Updated on 2024/04/28

写真a

 
KOBASHI, Makoto
 
Organization
Graduate School of Engineering Materials Process Engineering 1 Professor
Graduate School
Graduate School of Engineering
Undergraduate School
School of Engineering Materials Science and Engineering
Title
Professor
External link

Degree 1

  1. Doctor of Engineering ( 1995.7   Nagoya University ) 

Research Interests 14

  1. Additive manufacturing

  2. Porous metals, Lattice metals

  3. Multi-material, dissimilar material bonging (metal/polymer)

  4. Metal matrix composite

  5. Thermal management (heat storage, heat dissipation)

  6. Metal matrix composite

  7. Additive Manufacturing

  8. porous materials

  9. Ceramics matrix composite

  10. metal/polymer bonding

  11. Porous metals, Lattice metals

  12. Multi-material, dissimilar material bonging (metal/polymer)

  13. Thermal management (heat storage, heat dissipation)

  14. Additive manufacturing

Research Areas 6

  1. Nanotechnology/Materials / Structural materials and functional materials

  2. Nanotechnology/Materials / Composite materials and interfaces

  3. Nanotechnology/Materials / Material processing and microstructure control

  4. Nanotechnology/Materials / Composite materials and interfaces

  5. Nanotechnology/Materials / Structural materials and functional materials

  6. Nanotechnology/Materials / Material processing and microstructure control

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Current Research Project and SDGs 6

  1. Multi-material by metal/CFRP bonding

  2. Hybridization of metal lattice and phase change material (PCM)

  3. Fabrication of Ceramic, Intermetallic foam

  4. Material development by laser additive manufacturing

  5. Synthesis of particle dispersed alloy with the help of Selfpropagating-High temperature reaction

  6. 各種ポーラス金属の製造技術の開発

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Research History 8

  1. Nagoya University   Vice Dean

    2020.4 - 2022.3

  2. Nagoya University   Vice Dean

    2020.4 - 2022.3

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  3. 名古屋大学   大学院工学研究科   教授

    2014.6

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    Country:Japan

  4. Nagoya University   Professor

    2014.6

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    Country:Japan

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  5. 名古屋大学大学院工学研究科 准教授(助教授)

    2004.4 - 2014.5

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    Country:Japan

  6. 文部省在外研究員(ドイツ・フラウンホーファー研究所等)

    2001.2 - 2001.4

  7. オックスフォード大学   材料工学科 客員研究員

    1996.4 - 1997.2

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    Country:Japan

  8. 名古屋大学工学部材料プロセス工学科・助手

    1990.4 - 2003.3

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    Country:Japan

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Education 3

  1. Nagoya University   Graduate School, Division of Engineering

    - 1990

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    Country: Japan

  2. Nagoya University   Graduate School, Division of Engineering

    - 1990

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    Country: Japan

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  3. Nagoya University   Faculty of Engineering

    - 1988

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    Country: Japan

Professional Memberships 10

  1. 日本金属学会

  2. 軽金属学会

  3. 塑性加工学会

  4. 日本鋳造工学会

  5. Japan Society of Powder and Powder Metallurgy

  6. 軽金属学会

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  7. Japan Society of Powder and Powder Metallurgy

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  8. 日本鋳造工学会

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  9. 日本金属学会

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  10. 塑性加工学会

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Committee Memberships 14

  1. 軽金属学会研究委員会   委員  

    2013.4   

  2. 日本塑性加工学会校閲運営委員会   委員  

    2013.4   

  3. アルミニウム協会ロードマップ検討委員会   委員  

    2012.4   

  4. 日本金属学会第二分科会   委員  

    2012.4   

  5. 軽金属学会学会賞選考委員会   委員  

    2012.4   

  6. 軽金属学会理事会   理事  

    2017.4   

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    Committee type:Academic society

  7. 軽金属学会理事会   理事  

    2017.4   

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    Committee type:Academic society

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  8. 軽金属学会研究委員会   委員  

    2014.4   

  9. 軽金属学会研究委員会   委員  

    2014.4   

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  10. 日本塑性加工学会校閲運営委員会   委員  

    2013.4   

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  11. 軽金属学会研究委員会   委員  

    2013.4   

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  12. 日本金属学会第二分科会   委員  

    2012.4   

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  13. アルミニウム協会ロードマップ検討委員会   委員  

    2012.4   

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  14. 軽金属学会学会賞選考委員会   委員  

    2012.4   

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Awards 8

  1. 軽金属功績賞

    2020.5   軽金属学会  

  2. 論文賞

    2020.5   粉体粉末冶金協会  

  3. 永井科学技術財団学術賞

    2013.3   永井科学技術財団  

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    Country:Japan

  4. 軽金属学会躍進賞

    2008.11   軽金属学会  

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    Country:Japan

  5. 軽金属論文賞

    1997   軽金属学会  

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    Country:Japan

  6. 軽金属奨励賞

    1997   軽金属学会  

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    Country:Japan

  7. 軽金属功績賞

    2020.5   軽金属学会  

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  8. 論文賞

    2020.5   粉体粉末冶金協会  

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Papers 287

  1. Elucidating dominant flow channel size for capillary performance of open-cell porous wicks Reviewed

    Shen, HF; Suzuki, A; Takata, N; Kobashi, M

    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER   Vol. 223   page: 125217   2024.5

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijheatmasstransfer.2024.125217

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  2. Laser-beam powder bed fusion of Al-Fe-Cu alloy to achieve high strength and thermal conductivity Reviewed

    Cheng, Y; Miyawaki, T; Wang, WY; Takata, N; Suzuki, A; Kobashi, M; Kato, M

    ADDITIVE MANUFACTURING LETTERS   Vol. 8   page: 100191   2024.2

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    DOI: 10.1016/j.addlet.2023.100191

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  3. Austenite Reversion Behavior of Maraging Steel Additivemanufactured by Laser Powder Bed Fusion

    Takata, N; Ito, Y; Nishida, R; Suzuki, A; Kobashi, M; Kato, M

    ISIJ INTERNATIONAL   Vol. 64 ( 2 ) page: 303 - 315   2024

  4. Evaluation of reactive wetting kinetics of carbon fibers by molten Al-Ti alloy and its application to the fabrication of Al/carbon fiber composites Reviewed

    Suzuki, A; Ishiguro, R; Miwa, T; Takata, N; Kobashi, M; Furukawa, Y

    JOURNAL OF ALLOYS AND COMPOUNDS   Vol. 968   page: 172168   2023.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jallcom.2023.172168

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  5. Persistent Homology Analysis of the Microstructure of Laser-Powder-Bed-Fused Al–12Si Alloy Reviewed

    Asuka Suzuki, Yusuke Sasa, Makoto Kobashi, Masaki Kato, Masahito Segawa, Yusuke Shimono, Sukeharu Nomoto

    Materials   Vol. 16 ( 22 ) page: 7228   2023.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    The laser powder bed fusion (L-PBF) process provides the cellular microstructure (primary α phase surrounded by a eutectic Si network) inside hypo-eutectic Al–Si alloys. The microstructure changes to the particle-dispersed microstructure with heat treatments at around 500 °C. The microstructural change leads to a significant reduction in the tensile strength. However, the microstructural descriptors representing the cellular and particle-dispersed microstructures have not been established, resulting in difficulty in terms of discussion regarding the structure–property relationship. In this study, an attempt was made to analyze the microstructure in L-PBF-built and subsequently heat-treated Al–12Si (mass%) alloys using the persistent homology, which can analyze the spatial distributions and connections of secondary phases. The zero-dimensional persistent homology revealed that the spacing between adjacent Si particles was independent of Si particle size in the as-built alloy, whereas fewer Si particles existed near large Si particles in the heat-treated alloy. Furthermore, the first principal component of a one-dimensional persistent homology diagram would represent the microstructural characteristics from cellular to particle-dispersed morphology. These microstructural descriptors were strongly correlated with the tensile and yield strengths. This study provides a new insight into the microstructural indices describing unique microstructures in L-PBF-built alloys.

    DOI: 10.3390/ma16227228

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  6. Machine learning surrogate modeling toward the design of lattice-structured heat sinks fabricated by additive manufacturing Reviewed

    Asuka Suzuki, Hideto Nakatani, Makoto Kobashi

    Materials & Design   Vol. 230   page: 111969   2023.6

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.matdes.2023.111969

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  7. Mechanical coupling and tuned anisotropic elasticity: Numerical and experimental material design for shear-normal and shear-shear interactions Reviewed International coauthorship

    Molavitabrizi, D; Suzuki, A; Kobashi, M; Mousavi, SM

    MATERIALS & DESIGN   Vol. 230   page: 111950   2023.6

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    DOI: 10.1016/j.matdes.2023.111950

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  8. Fabrication of Al-CNT composite with high hardness and electrical conductivity by controlling Al4C3 formation Reviewed

    Kim, D; Hirayama, Y; Liu, Z; Takagi, K; Kobashi, M

    JOURNAL OF ALLOYS AND COMPOUNDS   Vol. 942   page: 169102   2023.5

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    DOI: 10.1016/j.jallcom.2023.169102

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  9. B2-structured Fe<inf>3</inf>Al alloy manufactured by laser powder bed fusion: Processing, microstructure and mechanical performance Reviewed International coauthorship

    A. M. Vilardell, L. Pelcastre, D. Nikas, P. Krakhmalev, M. Kato, N. Takata, M. Kobashi

    Intermetallics   Vol. 156   page: 107849   2023.5

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    Prealloyed Fe3Al was successfully manufactured by laser powder bed fusion. The best set of process parameters led to parts with a relative density of 99.5 %, a surface roughness, Sa, of 31.5 ± 5.6 μm and a hardness of 319 ± 14 HV0.1. Its microstructure as well as its mechanical properties at room and high temperatures were analyzed. The results of the chemical composition showed minor variations in aluminum content oscillating between 21 and 28 at.% along the melt pool. Additionally, elongated grains were observed to grow parallel to the building direction, as well as the development of a weak {001} texture along the building direction. The mechanical properties were influenced by the temperature. Compression tests showed a loss in strength with the increase in temperature, from a yield strength of 621 ± 40 MPa at room temperature to 89 ± 20 MPa at 650 °C. Reciprocating sliding wear tests showed that fragmentation of the intermetallic at room temperature occurs, whereas plastic deformation dominated at higher temperatures. For all temperatures, tribochemical wear was also present due to the oxidation of wear debris.

    DOI: 10.1016/j.intermet.2023.107849

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  10. Ultra-high coercivity Sm-Co bulk magnets with remarkable thermal stability Reviewed

    Park, K; Hirayama, Y; Wang, J; Kobashi, M

    SCRIPTA MATERIALIA   Vol. 218   2022.9

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    DOI: 10.1016/j.scriptamat.2022.114847

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  11. Iron aluminides as an alternative binder for cemented carbides: A review and perspective towards additive manufacturing Reviewed International coauthorship

    Vilardell, AM; Cinca, N; Tarres, E; Kobashi, M

    MATERIALS TODAY COMMUNICATIONS   Vol. 31   2022.6

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    DOI: 10.1016/j.mtcomm.2022.103335

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  12. Laser powder bed fusion of polyamide-composite for antibacterial applications: Characterization and properties Reviewed International coauthorship

    Vilardell, AM; Yadroitsava, I; Wolf, WKC; Du Plessis, A; Tshibalanganda, M; Kouprianoff, DP; Garcia-Giralt, N; Kobashi, M; Yadroitsev, I

    MATERIALS TODAY COMMUNICATIONS   Vol. 31   2022.6

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    DOI: 10.1016/j.mtcomm.2022.103727

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  13. Exchange-Coupled SmCo5/Fe Nanocomposite Magnet Prepared by Low Oxygen Powder Metallurgy Process Reviewed

    Park K., Hirayama Y., Yamaguchi W., Kobashi M., Takagi K.

    IEEE TRANSACTIONS ON MAGNETICS   Vol. 58 ( 2 )   2022.2

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/TMAG.2021.3080688

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  14. Anisotropic Sm-Co nanopowder prepared by induction thermal plasma Reviewed

    Kwangjae Park, Yusuke Hirayama, Masaya Shigeta, Zheng Liu, Makoto Kobashi, Kenta Takagi

    Journal of Alloys and Compounds   Vol. 882   page: 160633 - 160633   2021.11

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    DOI: 10.1016/j.jallcom.2021.160633

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  15. Effect of added stabilizing elements on thermal activation process of plastic deformation in 18Cr ferritic stainless steel Reviewed

    Hongmei Li, Naoki Takata, Makoto Kobashi, Masataka Yoshino

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 824   2021.9

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    The effects of a trace amount (similar to 0.1 at.%) of added stabilizing elements (Nb, Ti, and Zr) on the tensile properties of 18Cr ferritic stainless steel sheets at strain rates ranging from 10(-3)-10(2) s(-1) (from ordinary quasi-static deformation to dynamic deformation) were investigated. The additional Ti or Zr elements formed coarse carbide or nitride precipitates, which consumed interstitial solute elements (C and/or N) in the ferrite matrix. In the Nb-added steel, however, only fine NbN precipitates with a few hundred nanometers in size were observed locally, implying a small amount of solute Nb in the ferrite matrix. Ti or Zr additions had only a slight effect on the deformation resistance of 18Cr ferritic steel sheets and strain rate sensitivity (m) of the flow stress, however, the Nb addition increased the deformation resistance and significantly reduced the strain rate sensitivity. The measured activation volume (v*) values of the Ti- and Zr-added steels (62 b(3) and 66 b(3)) were almost equivalent to one of the 18Cr base steel (64 b(3)). This result suggested that a general thermally activated process for screw dislocation motion is controlled by double-kink nucleation, which is slightly affected by Ti or Zr additions. The high v* value (106 b(3)) of the Nb-added steel indicated that the thermally activated process of plastic deformation would be associated with the substitutional solute Nb atoms (act as short-range obstacles) interacting with the moving dislocations. These results showed that the Nb element played a distinct role in plastic deformation from the other stabilizing elements of Ti and Zr.

    DOI: 10.1016/j.msea.2021.141866

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  16. Dual plateau stress of C15-type topologically close-packed lattice structures additive-manufactured by laser powder bed fusion Reviewed

    Xiaoyang Liu, Asuka Suzuki, Naoki Takata, Makoto Kobashi, Masaki Kato

    SCRIPTA MATERIALIA   Vol. 202   2021.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    Imitating crystal structures offers new avenues to design lattice structures composed of unit cells with nodes (act as atoms) and struts (act as atomic bonds). We found out unique dual plateau regions in the stress-strain curves of lattice structures inspired by topologically close-packed (TCP) structure of C15 Laves phase (AB(2)-type intermetallic compounds) and manufactured via the laser powder bed fusion. X-ray computed tomography of compressively deformed lattice structures as well as finite element analysis revealed that the existence of two kinds of units with different relative density caused the dual plateau regions. In addition, the C15 lattice structures exhibited a hybrid deformation mode of bending- and stretch-dominated deformations and can absorb high total energy of 5.0 MJ.m(-3) in two stress levels. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.scriptamat.2021.114003

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  17. Thermal activation process of plastic deformation in Fe-18Cr single-crystal micropillars with high-density dislocations Reviewed

    Hongmei Li, Tianqi Zhu, Naoki Takata, Makoto Kobashi, Masataka Yoshino

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 819   2021.7

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    Micropillar compression testing was performed on bcc solid-solution single-crystal micropillars with two diameter (d) ranges (2-3 and 5-6 mu m) prepared on the surfaces of fully annealed and subsequently 10% coldrolled 18Cr ferritic steel specimens. This was done to investigate the effect of initial dislocations on the plastic deformation of micron-sized crystals. The 10% cold rolling process significantly increased the stress level (provided by an activated single slip system) required to initiate slip in the annealed micropillars with different diameter ranges. In the case of the annealed micropillars, the strain-rate sensitivity (m) of the yield stress becomes lower for larger specimens (the m value decreased from 0.12 to 0.04). However, the 10% cold-rolled micropillars exhibited a much lower strain-rate sensitivity regardless of the specimen size. The activation volume (v*) of the annealed micropillars showed a significant specimen size dependency (v*proportional to d1.47), consistent with published data on the micropillar compression experiments of single-crystals of the bcc metals and alloys. For the 10% cold-rolled micropillars, the high v* values (88b3 and 112b3) showed a slight dependency on the specimen size (v*proportional to d0.33). The v* values appeared somewhat higher but were equivalent to those of bulk-size specimens, suggesting that the initial high-density dislocations would provide sufficient sources for dislocation multiplication in the micron-sized specimens under compression. The observed high v* values might be associated with the strong dislocation interactions in the alpha-(Fe, Cr) solid-solution matrix.

    DOI: 10.1016/j.msea.2021.141459

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  18. Highly Conductive Al/Al Interfaces in Ultrafine Grained Al Compact Prepared by Low Oxygen Powder Metallurgy Technique Reviewed

    Kim, D; Hirayama, Y; Liu, Z; Kwon, H; Kobashi, M; Takagi, K

    NANOMATERIALS   Vol. 11 ( 5 )   2021.5

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    DOI: 10.3390/nano11051182

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  19. Processability and Optimization of Laser Parameters for Densification of Hypereutectic Al-Fe Binary Alloy Manufactured by Laser Powder Bed Fusion Reviewed

    Wenyuan Wang, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    CRYSTALS   Vol. 11 ( 3 )   2021.3

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    Centimeter-sized samples of hypereutectic Al-15 mass% Fe alloy were manufactured by a laser powder bed fusion (L-PBF) process while systematically varying laser power (P) and scan speed (v). The effects on relative density and melt pool depth of L-PBF-manufactured samples were investigated. In comparison with other Al alloys, a small laser process window of P = 77-128 W and v = 0.4-0.8 ms(-1) was found for manufacturing macroscopically crack-free samples. A higher v and P led to the creation of macroscopic cracks propagating parallel to the powder-bed plane. These cracks preferentially propagated along the melt pool boundaries decorated with brittle theta-Al13Fe4 phase, resulting in low L-PBF processability of Al-15%Fe alloy. The deposited energy density model (using P center dot v(-1)(/2)) would be useful for identifying the optimum L-PBF process conditions towards densification of Al-15%Fe alloy samples, in comparison with the volumetric energy density (using P center dot v(-1)), however, the validity of the model was reduced for this alloy in comparison with other alloys with high thermal conductivities. This is likely due to inhomogeneous microstructures having numerous coarsened theta-Al13Fe4 phases localized at melt pool boundaries. These results provide insights into achieving sufficient L-PBF processability for manufacturing dense Al-Fe binary alloy samples.

    DOI: 10.3390/cryst11030320

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  20. Managing both high strength and thermal conductivity of a laser powder bed fused Al-2.5Fe binary alloy: Effect of annealing on microstructure Reviewed

    Xing Qi, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 805   page: 140591   2021.2

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    The microstructure of Al-2.5Fe (wt%) binary alloy samples additively manufactured by laser powder bed fusion (L-PBF) was systematically characterized, and its change due to subsequent annealing at 300 degrees C and 500 degrees C was examined. The as-fabricated samples featured homogeneous distribution of numerous fine particles of the metastable Al6Fe phase in the solidification microstructure where melt pools formed, and a relatively coarsened cellular structure was observed around the boundaries between the melt pools formed at different locations (melt pool boundaries). After the annealing at 300 degrees C, a slight growth of the nano-sized Al6Fe phase occurred, and coarsened plate-like.-Al13Fe4 phases were locally formed in the cellular structure at melt pool boundaries. Annealing at 500 degrees C induced a pronounced transformation of the metastable Al6Fe phase to the stable.-Al13Fe4 phase in the microstructure where melt pools formed, although no significant change in the microstructure of the a-Al matrix was detected. The thermal conductivity and tensile properties of as-fabricated and subsequently annealed specimens were measured. The as-fabricated specimens exhibited a high tensile strength of similar to 320 MPa and a thermal conductivity of similar to 150 W m(-1) K-1. Annealing at 300 degrees C improved the thermal conductivity to similar to 185 W m(-1) K-1 without a loss of tensile strength, whereas annealing at 500 degrees C significantly decreased the tensile strength. These results are utilized to discuss a balance between mechanical properties and thermal conductivity, which provided novel insights for managing both high strength and thermal conductivity of L-PBFbuilt Al-Fe binary alloys by controlling microstructure.

    DOI: 10.1016/j.msea.2020.140591

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  21. Understanding and suppressing shear band formation in strut-based lattice structures manufactured by laser powder bed fusion

    Liu Xiaoyang, Wada Takafumi, Suzuki Asuka, Takata Naoki, Kobashi Makoto, Kato Masaki

    MATERIALS & DESIGN   Vol. 199   2021.2

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    DOI: 10.1016/j.matdes.2020.109416

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  22. Understanding and suppressing shear band formation in strut-based lattice structures manufactured by laser powder bed fusion

    Liu Xiaoyang, Wada Takafumi, Suzuki Asuka, Takata Naoki, Kobashi Makoto, Kato Masaki

    MATERIALS & DESIGN   Vol. 199   2021.2

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  23. Fabrication of Metal Matrix Composite Containing Manganese Nitride Showing Giant Negative Thermal Expansion by Compressive Torsion Processing Reviewed

    Koshi Takenaka, Kentaro Otsuka, Yoshihiko Okamoto, Yuji Kume, Makoto Kobashi

    MATERIALS TRANSACTIONS   Vol. 62 ( 5 ) page: 590 - 595   2021

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:JAPAN INST METALS & MATERIALS  

    Antiperovskite manganese nitride Mn3.1Zn0.5Sn0.4N was composited with Al by compressive torsion processing (CTP). This class of nitrides is anticipated for use as a thermal-expansion compensator because of giant negative thermal expansion (NTE). It is difficult to form a composite with molten metal that causes a chemical reaction. To date, only limited success has been achieved. Composites formed by CTP at 573K exhibit lower thermal expansion and electrical resistivity than those produced by electric-current sintering. That achievement is attributable to suppressed chemical erosion of the filler by treatment at a lower temperature while the strong mechanical energy strengthens the interface between the filler and the matrix and reduces pores in the material. Compressive torsion processing is a promising method for forming metal matrix composites containing giant NTE fillers.

    DOI: 10.2320/matertrans.MT-M2020363

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  24. Induction-activated self-propagating, high-temperature synthesis of nickel aluminide

    Shekari M., Adeli M., Khobzi A., Kobashi M., Kanetake N.

    ADVANCED POWDER TECHNOLOGY   Vol. 28 ( 11 ) page: 2974 - 2979   2017.11

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    DOI: 10.1016/j.apt.2017.09.004

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  25. Change in microstructure of selectively laser melted AlSi10Mg alloy with heat treatments

    Takata Naoki, Kodaira Hirohisa, Sekizawa Keito, Suzuki Asuka, Kobashi Makoto

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 704   page: 218 - 228   2017.9

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    DOI: 10.1016/j.msea.2017.08.029

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  26. Compressive properties of porous Ti-Al alloys fabricated by reaction synthesis using a space holder powder

    Takata Naoki, Uematsu Keisuke, Kobashi Makoto

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 697   page: 66 - 70   2017.6

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    DOI: 10.1016/j.msea.2017.05.015

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  27. Microstructural origins of high strength of Al–Si alloy manufactured by laser powder bed fusion: In-situ synchrotron radiation X-ray diffraction approach Reviewed

    Naoki Takata, Mulin Liu, Masahiro Hirata, Asuka Suzuki, Makoto Kobashi, Masaki Kato, Hiroki Adachi

    Journal of Materials Science and Technology   Vol. 178   page: 80 - 89   2024.4

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    The microstructural factors contributing to the high strength of additive-manufactured Al–Si alloys using laser-beam powder bed fusion (PBF-LB) were identified by in-situ synchrotron X-ray diffraction in tensile deformation and transmission electron microscopy. PBF-LB and heat treatment were employed to manufacture Al–12%Si binary alloy specimens with different microstructures. At an early stage of deformation prior to macroscopic yielding, stress was dominantly partitioned into the α-Al matrix, rather than the Si phase in all specimens. Highly concentrated Si solute (∼3%) in the α-Al matrix promoted the dynamic precipitation of nanoscale Si phase during loading, thereby increasing the yield strength. After macroscopic yielding, the partitioned stress in the Si phase monotonically increased in the strain-hardening regime with an increase in the dislocation density in the α-Al matrix. At a later stage of strain hardening, the flow curves of the partitioned stress in the Si phase yielded stress relaxation owing to plastic deformation. Therefore, Si-phase particles localized along the cell walls in the cellular-solidified microstructure play a significant role in dislocation obstacles for strain hardening. Compared with the results of the heat-treated specimens with different microstructural factors, the dominant strengthening factors of PBF-LB manufactured Al–Si alloys were discussed.

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  28. CALPHAD-aided design of high-strength Al-Si-Mg alloys for sufficient laser powder bed fusion processability Reviewed

    Otani, Y; Saki, K; Takata, N; Suzuki, A; Kobashi, M; Kato, M

    JOURNAL OF ALLOYS AND COMPOUNDS   Vol. 977   page: 173449   2024.3

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  29. Microstructural factors controlling crack resistance of Zn-Al-Mg alloy coatings prepared via hot-dip galvanizing process: Combined approach of in-situ SEM observation with digital image correlation analysis Reviewed

    Kim, D; Takata, N; Yokoi, H; Suzuki, A; Kobashi, M

    JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T   Vol. 29   page: 1535 - 1541   2024.3

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  30. 単結晶マイクロピラー圧縮試験を用いたAl-Fe合金積層造形体の高強度支配因子の検討 Reviewed

    長子明弘, 朱 天斉, 高田尚記, 鈴木飛鳥, 小橋 眞

    軽金属   Vol. 73 ( 11 ) page: 523 - 529   2023.11

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  31. Wear properties of aluminum alloys fabricated by laser powder bed fusion Reviewed International coauthorship

    Gong, S; Takata, N; Kobashi, M; Shin, SE

    TRIBOLOGY INTERNATIONAL   Vol. 187   page: 108769   2023.9

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  32. Design of Al-Fe-Mn alloy for both high-temperature strength and sufficient processability of laser powder bed fusion Reviewed

    Wenyuan Wang, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    ADDITIVE MANUFACTURING   Vol. 68   page: 103524   2023.4

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    This paper presents a novel design concept for Al alloys with both sufficient laser powder bed fusion (L-PBF) processability and high-temperature mechanical performance using an Al-Fe-Mn ternary alloy with a refined alpha-Al/Al6M (M = Fe, Mn) two-phase microstructure. The near-eutectic (liquid -> alpha-Al(fcc) + Al6M) composition of Al-2.5Fe-2Mn (mass%) was designed to avoid the formation of coarse primary intermetallics (having a detrimental effect on the PBF processability for densification) based on non-equilibrium liquidus projection thermodynamic calculations. The designed Al-2.5Fe-2Mn alloy powder exhibited sufficient L-PBF processability, and fully dense centimeter-sized samples (relative densities of above 99%) were successfully prepared. The L-PBF Al-2.5Fe-2Mn alloy samples exhibited a significantly refined solidification microstructure consisting of Al6M and alpha-Al phases in the melt-pool regions. Fe and Mn alloying elements contributed to the formation of nanoscale Al6M-phase particles and a high solid solution concentration in the alpha-Al matrix. The strength of the L-PBF Al-2.5Fe-2Mn alloy was slightly reduced at higher temperatures, but remained above 240 MPa at an elevated temperature of 300 degrees C. This superior high-temperature mechanical performance was attributed to the high thermal stability of the refined alpha-Al/Al6M two-phase microstructure and the formation of nanosized Al6M-phase precipitates.

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  33. Microstructural origin of anisotropic tensile ductility of Al-Si alloy manufactured by laser powder bed fusion Reviewed

    Yuki Otani, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    Scripta Materialia   Vol. 226   2023.3

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    Aluminum alloys fabricated by laser powder bed fusion (L-PBF) exhibit anisotropic tensile ductility. To identify microstructural origins in melt-pool (MP) structures (formed by the L-PBF process) contributing to the anisotropic ductility, the local strain distribution inside the MP structure in deformation was quantified by a combination of digital image correlation (DIC) strain analysis and in-situ SEM observations of tensile tests. It was found that higher strain was localized in locally coarsened microstructures (softer regions) along melt-pool boundaries (MPBs). The strain localization played a significant role in crack initiation (and propagation) around MPBs, contributing to fracture. The strain localization at MPBs changed depending on the geometrical relation of the MPBs with the loading direction (LD), which was controlled by the LD with respect to the building direction of L-PBF samples. The three-dimensional MPB distribution related to the LD would be responsible for the anisotropic ductility.

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  34. Austenite Reversion Behavior of Maraging Steel Additive-manufactured by Laser Powder Bed Fusion Reviewed

    Naoki Takata, Yuya Ito, Ryoya Nishida, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN   Vol. 109 ( 3 ) page: 201 - 214   2023.3

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    This study was set to fundamentally investigate the characteristics of austenite reversion occurring in maraging steels additive-manufactured by laser powder bed fusion (L-PBF). The maraging steel samples manufactured under different L-PBF process conditions (laser power P and scan speed v) were subjected to heat treatments at 550 degrees C for various durations, compared with the results of the austenitized and water-quenched sample with fully martensite structure. The L-PBF manufactured samples exhibited the martensite structure (including localized austenite (gamma) phases) containing submicron-sized cellular structures. Enriched alloy elements were detected along the cell boundaries, whereas such cellar structure was not found in the water-quenched sample. The localized alloy elements can be rationalized by the continuous variations in the gamma-phase composition in solidification during the L-PBF process. The precipitation of nanoscale intermetallic phases and the following austenitic reversion occurred in all of the experimental samples. The L-PBF manufactured samples exhibited faster kinetics of the precipitation and austenite reversion than the water-quenched sample at elevated temperatures. The kinetics changed depending on the L-PBF process condition. The enriched Ni element (for stabilizing gamma phase) localized at cell boundaries would play a role in the nucleation site for the formation of gamma phase at 550 degrees C, resulting in the enhanced austenite reversion in the L-PBF manufactured samples. The variation in the reaction kinetics depending on the L-PBF condition would be due to the varied thermal profiles of the manufactured samples by consecutive scanning laser irradiation operated under different P and v values.

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  35. Effects of Mn and Cu Additions on Solidification Microstructure and High-Temperature Strength of Cast AlFe Binary Alloy Reviewed

    Naoki Okano, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    Materials Transactions   Vol. 64 ( 2 ) page: 492 - 499   2023

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    In order to investigate the effects of Mn and Cu additions on solidification microstructure and high-temperature strength of cast AlFe alloys, we have fabricated various AlFe-based alloys with compositions of Al1%Fe, Al1%Fe1%Mn, Al1%Fe1%Cu, and Al1%Fe1%Cu1%Mn (mol%) solidified at different cooling rates (0.3 K·s11 and 145 K·s11). In the Al1%Fe binary alloy, the coarsened ª-Al13Fe4 phase with a needle-shaped morphology was often observed in the furnace-cooled sample (0.3 K·s11), whereas the cast sample (145 K·s11) exhibited several elongated ¡ phases surrounded by fine ¡/Al6Fe eutectic microstructure. Such a solidification microstructure was observed in the cast Al1%Fe1%Cu alloy, whereas the Al23CuFe4 phase was locally formed in the finally solidified zone in the furnace-cooled sample. In the Al1%Fe1%Mn alloy, the Al6(Fe, Mn) phase was formed regardless of the cooling rate. Finer ¡/Al6(Fe, Mn) two-phase eutectic microstructure was almost entirely occupied in the cast sample. The fine eutectic microstructure was observed in the cast Al1%Fe1%Cu1%Mn alloy as well. Compression tests for cast alloy specimens revealed that the Al1%Fe1%Cu1%Mn alloy exhibited the highest strength level among the studied alloy specimens, indicating the combined addition of Mn and Cu elements could be effective in improving the high-temperature strength of the cast AlFe alloys.

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  36. Influence of Dislocation Substructure on Size-Dependent Strength of High-Purity Aluminum Single-Crystal Micro pillars Reviewed

    Naoki Takata, Shintaro Uesugi, Tianqi Zhu, Socihiro Takeyasu, Asuka Suzuki, Makoto Kobashi

    MATERIALS TRANSACTIONS   Vol. 64 ( 8 ) page: 1952 - 1958   2023

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    In order to understand the influence of dislocation substructures on the size-dependent strength (smaller is stronger) of micron-sized metals, we have fabricated single-crystal cylindrical micropillars with various diameters approximately ranging from 1 to 10 mu m, which were prepared on the surface of the fully annealed sample and the subsequently cold-rolled samples of high-purity aluminum (Al). The annealed micropillars exhibited a size dependence of the resolved shear stress required for slip. The shear stress (tau(i)) normalized by shear modulus (G) and the specimen diameter (d) normalized by Burgers vector (b) followed the correlation of tau(i)/G=0.33(d/b)(-0.63). The size-dependent strength was reduced by cold-rolling, resulting in lower power-law exponents (0.26 similar to 0.31) for the correlation in the cold-rolled specimens. The fine dislocation substructures introduced by the cold-rolling could be associated with the reduced size-dependent strength, which can be rationalized using the stochastic model of the dislocation source length in an assumption of homogenously distributed dislocations existing in the experimental micropillars. The inhomogeneous dislocation substructure with various dislocation cell sizes would contribute to a variation in the measured strength depending on the location, likely due to the probability of exiting the dislocation cell walls (local variation in dislocation density) in the micropillars fabricated on the cold-rolled Al samples<bold>.</bold>

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  37. Introducing Hatch Spacing into Deposited Energy Density toward Efficient Optimization of Laser Powder Bed Fusion Process Parameters Reviewed

    Mai Kunieda, Asuka Suzuki, Naoki Takata, Masaki Kato, Makoto Kobashi

    Materials Transactions   Vol. 64 ( 6 ) page: 1099 - 1106   2023

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    The optimization of processing parameters is indispensable for the laser powder bed fusion (L-PBF) process. The deposited energy density (DED) is one of the process indexes for the L-PBF process and has a simplified formula of P v 0.5, where P is the laser power, and v is the scan speed. This parameter describes the change in the relative density and the melt pool morphology with laser power and scan speed well, whereas it does not include the effect of other processing parameters, e.g., hatch spacing (S). In the present study, an attempt was made to incorporate the effect of S into DED. Al12Si (mass%) alloy cube samples were fabricated by L-PBF under various P, v, and S, for evaluating the relative density and the melt pool morphology. The melt pool depth and width of L-PBF-manufactured Al12Si alloy increased linearly with P v 0.5 and did not exhibit a clear correlation with S. Based on the experimental observation, the effect of hatch spacing on DED was estimated to be S 0.5, and a new index of P v 0.5 S 0.5 was proposed. This index described the change in the relative density of the L-PBF-manufactured Al12Si alloy with laser conditions (P, v, and S) well when the thermal conduction mode melting was dominant. This study also indicated the limitation of the applicability of P v 0.5 S 0.5 under the keyhole or transition mode melting.

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  38. Effect of solute Ni on thermal activation process of plastic deformation in Fe-18Cr single-crystal micropillars Reviewed

    Tianqi Zhu, Hongmei Li, Naoki Takata, Makoto Kobashi, Masataka Yoshino

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 857   2022.11

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    The aim of the present study was to identify the effect of solute Ni element on the plastic deformation and its thermal activation process of 18Cr ferritic stainless steels. Single-crystal micropillars with different diameters of approximately 2 and 5 mu m were fabricated on the surface of Fe-18%Cr-Ni alloy sheets containing different contents of Ni (0-2 mass%). Compression tests were performed on the micropillars at different initial strain rates to investigate the strain rate sensitivity (m) of stress for the slip initiation and the specimen-size dependence of the m value. In micropillars with a small diameter of 2 mu m, the Fe-18%Cr binary alloy specimen exhibited a relatively higher strain-rate sensitivity of initial slip stress (m = 0.12), whereas m was reduced to 0.01 by adding 2% Ni. The same trend was observed in micropillars with a larger size of approximately 5 mu m. The experimental results were utilized to evaluate the activation volume of plastic deformation. The activation volumes of the Fe-18%Cr alloy and alloy containing 1% Ni followed the specimen-size dependence trend of activation volume in bcc metals; however, the alloy containing 2% Ni exhibited larger activation volumes, suggesting a different thermal activation process presumably due to the significant interaction that occurred between dislocations and solute Ni atoms in bcc solid-solutions.

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  39. Design of heat-resistant Al–Mg –Zn–Cu–Ni quinary alloy: Controlling intermetallic phases and mechanical performance at elevated temperature

    Ruoqi Li, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    Materials Science and Engineering: A   Vol. 857   2022.11

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    Owing to good formability, wrought Al alloys are used in a wide range of industries, including turbochargers in automobile engines. The development of Al alloys with increased high-temperature strength is necessary to improve the fuel efficiency of engines. In this study, a modified heat-resistant Al–Mg–Zn–Cu–Ni quinary alloy with superior high-temperature strength and creep rupture life at 200 °C (potential temperature in service for compressor radial impellers) was designed. The thermodynamic assessments provided a modified alloy composition of Al–5Mg–3.5Zn–2Cu–2Ni (at %) exhibiting α-Al phase in equilibrium with T-Al6Mg11Zn11 and Al3(Ni, Cu)2 phases at elevated temperatures. The experimental alloy showed granular T and Al3(Ni, Cu)2 phases often located on grain boundaries in the α-Al matrix, although the undissolved Al3Ni phase (formed in solidification) locally remained. Apart from the T phase, the η-Zn2Mg phase containing Cu element preferentially precipitated on grain boundaries. A large number of fine precipitates were dispersed homogeneously in the grain interior after the aging at 200 °C or 300 °C. Compared to the base alloy with a ternary composition of Al–5Mg–3.5Zn (at %) and conventional Al alloys, the designed quinary alloy (pre-aged at 200 °C for 10 h) showed a high strength at elevated temperatures above 200 °C. The creep-rupture life at 200 °C/105 MPa was remarkably extended to 665 h by the addition of Cu and Ni elements into the base ternary alloy. The rupture life was more than ten times longer than one (57 h) of the ternary alloys. The alloy modification based on the thermodynamic calculations provides an effective approach for designing lightweight Al alloys with superior high-temperature strength and creep rupture life.

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  40. Machine-learning assisted optimization of process parameters for controlling the microstructure in a laser powder bed fused WC/Co cemented carbide Reviewed

    Asuka Suzuki, Yusuke Shiba, Hiroyuki Ibe, Naoki Takata, Makoto Kobashi

    Additive Manufacturing   Vol. 59   2022.11

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    A Single laser scan was performed on a sintered WC/Co composite and the process conditions were optimized to realize a WC/Co two-phase microstructure in a WC/Co composite fabricated by laser powder bed fusion (L-PBF). Laser irradiation on the sintered WC/Co composites generated two different microstructural regions. One is composed of WC and Co phases (WC/Co two-phase region), and the other includes W2C and W3Co3C phases (WC decomposition region). In the L-PBF-fabricated WC/Co composites, these two microstructural regions are distributed in a complex manner and their fractions varies depending on the laser parameters. Using a convolutional neural network model that is trained with the micrographs of single-laser-scanned WC/Co composites, the fractions of the two microstructural regions in the WC/Co composites fabricated by the L-PBF under various laser conditions were quantified. Multiple linear regression analyses revealed that the laser power and spot size contribute more than the scan speed, which has been verified by numerical analysis based on the moving heat source model. A support vector machine (SVM) suggested that low laser power and low scan speed are required for suppressing the WC decomposition in the consolidated samples. The WC decomposition has been successfully suppressed in the samples fabricated under SVM-recommended conditions.

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  41. Optimizing Laser Conditions and Controlling Microstructure/Properties of Laser Powder Bed Fused Al-Si Alloys

    SUZUKI Asuka, TAKATA Naoki, KOBASHI Makoto, KATO Masaki

    Journal of the Japan Society of Powder and Powder Metallurgy   Vol. 69 ( 10 ) page: 417 - 425   2022.10

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    In the laser beam powder bed fusion (PBF-LB) processes, laser parameters need to be customized for fabricating dense components. Al-Si alloys are representative Al alloys used for the PBF-LB processes. The Al-Si alloys fabricated by the PBF-LB processes exhibit characteristic microstructures and mechanical properties, which are affected by the laser parameters. This paper describes the effect of laser conditions on the relative density, microstructure, and mechanical properties of Al-12Si (mass%) alloy fabricated by the PBF-LB process. The first topic is a machine-learning-assisted exploration of laser parameters (laser power and scan speed) for fabricating dense Al-12Si alloy parts. Using a neural network model, the laser condition range for fabricating dense Al-12Si alloy parts is predicted. A methodology for accurately predicting the laser condition range for fabricating dense components is introduced. The second topic is controlling the microstructures and mechanical properties of the dense Al-12Si alloys. Variations in α-Al crystal grain size/orientation, the width of primary α-Al phase, and solute Si content in α-Al matrix with laser conditions are introduced. The changes in mechanical properties with laser conditions and correlation with microstructural features are also described.

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  42. Controllable tensile performance of additively manufactured Al–Fe alloy Reviewed

    Xing Qi, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    Materials Science and Engineering: A   Vol. 855   2022.10

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    Achieving both high strength and ductility is challenging in additive manufacturing of Al alloys using the laser powder bed fusion (L-PBF) process by altering the laser conditions to control the microstructural characteristics. The current work focuses on the influence of varying laser energy density (ED), which is adjusted by different sets of laser power (P) and scan speed (v), on the microstructure-tensile property relationships of the L-PBF-fabricated Al–2.5%Fe alloy under varying laser conditions (P = 204–230 W, v = 450–600 mm/s) with a fixed powder layer thickness (t = 30 μm) and hatch distance (h = 30 μm). With increasing ED (= P/v·t·h), a slight increase in the average size of the columnar α-Al grains was found in the experimental samples concurrently with a higher fraction of <001>-oriented grains. Nanosized particles of the Al6Fe phase with an increased tendency to interconnect were observed in the matrix inside the melt pool, and the θ phase formed within the submicron-sized cellular structure along the melt pool boundaries (MPBs). A low tensile ductility, induced by the local microstructural inhomogeneities across MPBs, was found in all specimens tensile-deformed along the building direction, which was characterized by a preference fracture along the MPBs. At higher applied ED, the tensile ductility of the experimental Al–2.5Fe alloy was significantly improved with only a slight decrease in tensile strength. The difference in concentration of Fe across the MPBs in the matrix was also moderately diminished, which is consistent with the reduced local difference in microhardness across the MPBs under higher ED conditions. Therefore, the present results demonstrate that local microstructural inhomogeneities across MPBs can be controlled by the laser conditions, thereby producing both high strength and good ductility in the L-PBF processed Al–Fe alloys.

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  43. Meso-structural Control on Metal Surfaces Based on Powder Metallurgy and Its Application to Metal/Polymer Joining

    Suzuki Asuka, Takata Naoki, Kobashi Makoto

    Journal of the Society of Powder Technology, Japan   Vol. 59 ( 10 ) page: 511 - 517   2022.10

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    This paper introduces meso-scale structure synthesis on metal surfaces through reaction processes from raw metal powders. The mesostructures are applied to metal/polymer anchor joining. The first topic is the synthesis of Fe-based porous structure on Fe substrate through the combustion reaction of the Fe-Ti-B system. The structure could be controlled in view of the phase equilibria at the maximum temperature of the reaction. A Fe/epoxy resin joint via the porous structure exhibits high tensile strength in a direction perpendicular to the joint interface. The second topic is the fabrication of mesostructure protruded on an Al alloy surface by laser scanning on Al-Ti-C powders. The meso-structural morphology is related to the formation of TiC and Al<sub>3</sub>Ti phases, which can be understood based on the solidification sequence after the laser irradiation. An Al alloy/CFRTP joint via the mesostructure exhibits high joint strength compared with previously reported similar anchor joints.

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  44. Aluminum matrix composites reinforced with multi-walled carbon nanotubes and C-60 manufactured by laser powder bed fusion Reviewed International coauthorship

    Sangmin Yoo, Se-Eun Shin, Naoki Takata, Makoto Kobashi

    JOURNAL OF MATERIALS SCIENCE   Vol. 57 ( 38 ) page: 17984 - 17999   2022.10

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    Carbon nano-materials are widely used as reinforcing materials for aluminum-based composites due to their excellent metallurgical properties. This study presents an approach for manufacturing Al/C composites utilizing a high energy ball milling and laser powder bed fusion (LPBF) process. We prepared Al/C-60 and Al/MWCNT composites under 25 different conditions to observe their microstructure and mechanical property trends according to laser power and scan speed. The relative density of LPBFed composites increased as the energy density increased due to the oxide layer present on the aluminum surface and the high laser reflectance. It was found that, as the energy density increased, the increase in nanohardness and elastic modulus of the LPBFed composites was due to the high relative density. However, the high laser power condition of 179 W resulted in the softening of materials due to grain coarsening, resulting in a decrease in nanohardness and elastic modulus. Under the same laser conditions, the nanohardness of the LPBFed Al/2 vol.% MWCNT composites was approximately 0.5 GPa higher than that of the LPBFed Al/1 vol.% C-60 composites, which is explained by the high relative density and grain refinement strengthening.

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  45. Enhancing the solid-state joinability of A5052 and CFRTP via an additively manufactured micro-structure Reviewed

    Keiichiro Iwata, Asuka Suzuki, Seung Gwang Kim, Naoki Takata, Makoto Kobashi

    Journal of Materials Processing Technology   Vol. 306   2022.8

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    An Al alloy (A5052) sheet was joined with a carbon fiber-reinforced thermoplastic (CFRTP) sheet by hot pressing without melting the CFRTP sheet (that is, solid-state joining). A micro-structure was manufactured via laser irradiation of Al-Ti-C powders bedded on the A5052 sheet. The laser irradiation to Al-Ti-C powders generates numerous particle-shaped protrusions additively on the A5052 sheet, which facilitate the infiltration of CFRTP and mechanically interlock with the CFRTP sheet. To determine the optimal conditions for joining A5052 and CFRTP consisting of a polyamide 6 (PA6) matrix, the effects of joining temperature during hot pressing on the interfacial structure and joint strength were investigated. The maximum joint strength was attained at the joining temperature of 210 °C. At lower temperatures, PA6 was not sufficiently softened to infiltrate the micro-structure, resulting in lower joint strengths. At higher temperatures, carbon fibers (CFs) were exposed on the CFRTP surface and inhibited the penetration of PA6 and CFs into the micro-structure, thereby lowering the joint strength. To infiltrate PA6 and CFs into the micro-structure, hot pressing was performed in a gradient temperature field. The proposed process enabled appropriate infiltration of CFs and PA6 into the micro-structure and led to high and stable joint strength. It is expected that using the additively manufactured micro-structure approach proposed herein, the operating windows of various cutting-edge joining processes can be expanded to more moderate and lower energy conditions.

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  46. Microstructural Variations in Laser Powder Bed Fused Al-15%Fe Alloy at Intermediate Temperatures Reviewed

    Wenyuan Wang, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    MATERIALS   Vol. 15 ( 13 )   2022.7

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    The samples of the Al-15Fe (mass%) binary alloy that were additively manufactured by laser powder bed fusion (L-PBF) were exposed to intermediate temperatures (300 and 500 degrees C), and the thermally induced variations in their microstructural characteristics were investigated. The L-PBF-manufactured sample was found to have a microstructure comprising a stable theta-Al13Fe4 phase localized around melt-pool boundaries and several spherical metastable Al6Fe-phase particles surrounded by a nanoscale alpha-Al/Al6Fe cellular structure in the melt pools. The morphology of the theta phase remained almost unchanged even after 1000 h of exposure at 300 degrees C. Moreover, the nanoscale alpha-Al/Al6Fe cellular structure dissolved in the alpha-Al matrix; this was followed by the growth (and nucleation) of the spherical Al6Fe-phase particles and the precipitation of the theta phase. Numerous equiaxed grains were formed in the alpha-Al matrix during the thermal exposure, which led to the formation of a relatively homogenous microstructure. The variations in these microstructural characteristics were more pronounced at the higher investigated temperature of 500 degrees C.

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  47. Fast scanning calorimetry study of Al alloy powder for understanding microstructural development in laser powder bed fusion Reviewed

    Naoki Takata, Mulin Liu, Hongmei Li, Asuka Suzuki, Makoto Kobashi

    MATERIALS & DESIGN   Vol. 219   2022.7

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    We examined the variation in the solidification microstructure of AlSi10Mg alloy powder over a wide range of cooling rates controlled by using the fast scanning calorimetry (FSC) technique. Two exothermic peaks derived from the primary solidification of the alpha-Al phases and the alpha-Al/Si eutectic reaction were detected. These exothermic peaks became broader and shifted to lower temperatures at higher cooling rates. Focus ion beam (FIB) milling enables microstructural characterization of AlSi10Mg powder solidified at controlled cooling rates above 10(2) degrees C center dot s(-1) in the FSC equipment. The sample solidified at 4 x 10(4) degrees C center dot s(-1) exhibited a fine microstructure consisting of a primary alpha-Al phase surrounded by lamellar-shaped Si phases. The fraction of the Si phase continuously decreased with increasing cooling rate, indicating higher content of solute Si element in the alpha-Al phase solidified at a higher cooling rate. The secondary dendrite arm spacing (k) of the primary alpha-Al phase decreased in the sample solidified at a higher cooling rate (dT/dt). The relation follows a general equation of lambda = A (dT/dt)(-n) (A: 38.4, n: 0.33) in wide range of cooling rate (10(-1) similar to 10(4) degrees C center dot s(-1)). The results were utilized to discuss the cooling rate of Al alloys during the laser powder bed fusion (L-PBF) process. (c) 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/).

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  48. Design and controlling microstructure of cast-type aluminum eutectic alloys with an allowable service temperature of 300°C

    Takata Naoki, Okano Naoki, Aikawa Motonari, Okano Taiki, Suzuki Asuka, Kobashi Makoto

    Journal of Japan Institute of Light Metals   Vol. 72 ( 6 ) page: 381 - 387   2022.6

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    DOI: 10.2464/jilm.72.381

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  49. Image-based finite element analysis of anomalous thermal conductivity in Al-10%Si-0.4%Mg alloy additive-manufactured by laser powder bed fusion

    Suzuki Asuka, Miyasaka Tatsuya, Takata Naoki, Kobashi Makoto

    Journal of Japan Institute of Light Metals   Vol. 72 ( 5 ) page: 164 - 171   2022.5

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    Laser powder bed fused Al-10Si-0.4Mg (mass%) alloy exhibits low and anisotropic thermal conductivity. To elucidate dominant microstructural features generating the characteristic thermal conductivity, thermal conduction analysis was performed by an image-based finite element method (FEM) using scanning electron microscope (SEM) images. The serial sectioning images of as-fabricated and 300ºC/2 h heat treated Al-10Si-0.4Mg alloys were obtained by focused ion beam SEM (FIB-SEM) and were used for constructing three-dimensional models. The homogenization method was applied to calculate average thermal conductivity of these models. When the thermal conductivity of <i>α</i>-Al phase was set at the thermal conductivity of pure aluminum, calculated thermal conductivity of as-fabricated model was much higher than experimentally measured thermal conductivity of as-fabricated Al-10Si-0.4Mg alloy, indicating that <i>α</i>-Al phase in the as-fabricated Al-10Si-0.4Mg alloy had much lower thermal conductivity than pure aluminum. In addition, the anisotropy of thermal conductivity appeared only in the as-fabricated model in which the <i>α</i>-Al/Si interfacial thermal resistance was taken into account. These results were used for discussing dominant contributors of low and anisotropic thermal conductivity of laser additive manufactured Al-10Si-0.4Mg alloy.

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  50. Observation of compressive deformation behavior of Al-12%Si alloy lattice structures additive-manufactured by laser powder bed fusion using mechanical stress-induced luminescent material

    Kato Masaki, Suzuki Asuka, Mcmillan Matthew, Liu Xiaoyang, Takata Naoki, Kobashi Makoto

    Journal of Japan Institute of Light Metals   Vol. 72 ( 5 ) page: 246 - 250   2022.5

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    DOI: 10.2464/jilm.72.246

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  51. Negative strain rate sensitivity of yield strength of Al-Si alloy additive-manufactured using laser powder bed fusion Reviewed

    Naoki Takata, Mulin Liu, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    Scripta Materialia   Vol. 213   page: 114635 - 114635   2022.5

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  52. Novel approach in fabricating microchannel-structured La(Fe,Si)13Hy magnetic refrigerant via low-contamination route using dissolutive mold Reviewed

    Kaoru Imaizumi, Asaya Fujita, Asuka Suzuki, Makoto Kobashi, Kimihiro Ozaki

    Materials &amp; Design   Vol. 217   page: 110651 - 110651   2022.5

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  53. Microstructure and magnetocaloric property of homogeneous La(FexSi1−x)13 compounds fabricated by laser fusion using a powder mixture of Fe and LaySiz compounds Reviewed

    Kaoru Imaizumi, Asaya Fujita, Asuka Suzuki, Makoto Kobashi, Kimihiro Ozaki

    Journal of Alloys and Compounds   Vol. 901   page: 163706 - 163706   2022.4

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  54. Improvement of magnetocaloric effect in La(FexSi1-x)13 by dealing with inhibitory microstructures at high Fe concentration Reviewed

    Kaoru Imaizumi, Asaya Fujita, Asuka Suzuki, Makoto Kobashi, Kimihiro Ozaki

    Acta Materialia   Vol. 227   page: 117726 - 117726   2022.4

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  55. Design and Microstructural Control of Heat-Resistant Aluminum Wrought Alloys Based on Calculated Phase Diagrams Reviewed

    Takata Naoki, Suzuki Asuka, Kobashi Makoto

    Materia Japan   Vol. 61 ( 4 ) page: 195 - 201   2022.4

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    DOI: 10.2320/materia.61.195

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  56. High-temperature strength sustained by nano-sized eutectic structure of Al–Fe alloy manufactured by laser powder bed fusion Reviewed

    Wenyuan Wang, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    Materials Science and Engineering: A   Vol. 838   page: 142782 - 142782   2022.3

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  57. Solidification microstructure and room-temperature fracture toughness of Al-based cast alloys prepared through eutectic reactions in Al-Mg-Zn ternary system

    Naoki Okano, Motonari Aikawa, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    Journal of Japan Institute of Light Metals   Vol. 72 ( 3 ) page: 79 - 87   2022.3

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  58. Change in microstructural characteristics of laser powder bed fused Al–Fe binary alloy at elevated temperature Reviewed

    Xing Qi, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    Journal of Materials Science &amp; Technology   Vol. 97   page: 38 - 53   2022.1

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    DOI: 10.1016/j.jmst.2021.04.038

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  59. Influence of Added Fourth Elements on Precipitation in Heat-Resistant Al–Mg–Zn Ternary Alloys Reviewed

    Hiroki Ishii, Rikito Takagi, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    MATERIALS TRANSACTIONS   Vol. 63 ( 4 ) page: 513 - 521   2022

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    DOI: 10.2320/matertrans.MT-L2021021

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  60. Effect of heat treatment on solute Si content in Al-12%Si alloy additive-manufactured by laser powder bed fusion

    Naoki Takata, Mulin Liu, Asuka Suzuki, Makoto Kobashi, Masaki Kato, Shumpei Iwai, Hiroki Adachi

    Keikinzoku/Journal of Japan Institute of Light Metals   Vol. 72 ( 5 ) page: 178 - 184   2022

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    We have investigated microstructural characteristics and solute Si element in the α-Al (fcc) matrix of Al-12%Si binary alloy additive-manufactured by laser powder bed fusion (L-PBF) process in terms of different locations in the melt-pool structure (inside melt-pool or around melt-pool boundaries). Their variations by post heat-treatments at various temperatures were examined. The fraction of Si phase and lattice parameter of α-Al phase were quantified by XRD measurements combined with sample rotation and oscillation systems. In the L-PBF manufactured sample, the columnar α -Al phases contained highly concentrated Si element in solution (above 3 mol%) inside melt-pools, whereas the measured Si content was approximately 2 mol% in the relatively coarsened α-Al phase along melt-pool boundaries. The location dependence of solute Si content would be associated with a continuous change in growth rate of solid phase in solidification by local heating in the L-PBF process. The solute Si content was significantly reduced by heat-treatments and its location dependence appeared less pronounced. The as-manufactured sample exhibited a lower lattice parameter of α-Al phase with concentrated Si in solution in comparison with the heat-treated samples. The fraction of Si phase became higher in the heat-treated samples. These results were rationalized by microstructural change at elevated temperatures.

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  61. Application of Machine Learning to Process Parameter Optimizations of Metal Additive Manufacturing

    SUZUKI Asuka, IBE Hiroyuki, TAKATA Naoki, KOBASHI Makoto, KATO Masaki

    Journal of Japan Thermal Spray Society   Vol. 59 ( 4 ) page: 210 - 216   2022

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    This paper introduces machine learning approaches for process parameter optimizations of the laser powder bed fusion (L-PBF) process, which is one of the most representative additive manufacturing technologies. The first topic is an exploration of laser conditions for obtaining dense Al-12 mass%Si alloy parts using a neural network. A neural network architecture and training manner for precisely predicting optimized laser conditions using limited data are introduced. The second topic is laser parameter optimization for controlling the microstructure of L-PBF-fabricated WC/Co composites. Two characteristic microstructural regions (WC/Co two-phase region and WC decomposition region) are formed in the L-PBF-fabricated WC/Co composites. The WC decomposition region is formed by the melting of the WC particles and has a detrimental effect on the mechanical properties. Therefore, its formation should be suppressed. To quantify the amount of the WC decomposition region formed, a convolutional neural network model, in which micrographs of single-laser-scanned WC/Co composites were trained, was constructed. The support vector machine was also used for optimizing the laser parameters. These machine learning methods can make an efficient estimation of optimized laser parameters for the L-PBF process.

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  62. Precipitation morphology and kinetics of T-Al6Mg11Zn11 intermetallic phase in Al–Mg–Zn ternary alloys Reviewed

    Naoki Takata, Rikito Takagi, Ruoqi Li, Hiroki Ishii, Asuka Suzuki, Makoto Kobashi

    Intermetallics   Vol. 139   page: 107364 - 107364   2021.12

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  63. Control of microstructural characteristics and mechanical properties of AlSi12 alloy by processing conditions of laser powder bed fusion Reviewed

    Asuka Suzuki, Tatsuya Miyasaka, Naoki Takata, Makoto Kobashi, Masaki Kato

    Additive Manufacturing   Vol. 48   page: 102383   2021.12

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    To elucidate the possibility of controlling the microstructure and mechanical properties of Al-Si alloys additive-manufactured by laser powder bed fusion (L-PBF), the relationship among the laser conditions, microstructural characteristics (crystal grain, cellular microstructure, and solute Si in alpha-Al matrix), and tensile properties of L-PBF manufactured AlSi12 alloy samples was investigated. The crystal grain size and fraction of 001 ori-ented alpha-Al crystal grains toward the building direction increased as the laser power became higher and scanning velocity became slower. The width of cellular microstructure (sub-cell size) where the primary alpha-Al phase was surrounded by alpha-Al/Si eutectic microstructure increased as the laser power became higher and scanning velocity became slower. The refinement of microstructure was attributed to the solidification under high cooling rate, which was achieved by low laser power and high scanning velocity. The area fraction of Si phase analyzed from FE-SEM images tended to decrease as the laser power became higher and scanning velocity became slower, suggesting the possibility of solute Si concentration in alpha-Al matrix controlled by laser conditions. The STEM/EDS analysis revealed high concentration of solute Si in the alpha-Al matrix (above a solubility limit of 1.5 mol% in the Al-Si binary system) of L-PBF manufactured AlSi12 alloy samples and its concentration became higher in the sample manufactured using a higher laser power. The tensile tests of as-built AlSi12 specimens fabricated under various laser conditions were also performed. High strength and high ductility tended to be achieved when high power laser was applied in slow laser scanning velocity. The 0.2% proof stress was relatively higher when the laser scanning velocity was faster. The mechanical properties correlated with crystal grain size and sub-cell size rather than solute Si in the alpha-Al matrix. These results provide new insights to control mechanical performance of AlSi12 alloy via L-PBF processing parameters.

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  64. Precipitation Hardening at Elevated Temperatures above 400 °C and Subsequent Natural Age Hardening of Commercial Al–Si–Cu Alloy Reviewed

    Ruoqi Li, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Yuji Okada, Yuichi Furukawa

    Materials   Vol. 14 ( 23 ) page: 7155 - 7155   2021.12

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    The precipitation of intermetallic phases and the associated hardening by artificial aging treatments at elevated temperatures above 400 °C were systematically investigated in the commercially available AC2B alloy with a nominal composition of Al–6Si–3Cu (mass%). The natural age hardening of the artificially aged samples at various temperatures was also examined. A slight increase in hardness (approximately 5 HV) of the AC2B alloy was observed at an elevated temperature of 480 °C. The hardness change is attributed to the precipitation of metastable phases associated with the α-Al15(Fe, Mn)3Si2 phase containing a large amount of impurity elements (Fe and Mn). At a lower temperature of 400 °C, a slight artificial-age hardening appeared. Subsequently, the hardness decreased moderately. This phenomenon was attributed to the precipitation of stable θ-Al2Cu and Q-Al4Cu2Mg8Si6 phases and their coarsening after a long duration. The precipitation sequence was rationalized by thermodynamic calculations for the Al–Si–Cu–Fe–Mn–Mg system. The natural age-hardening behavior significantly varied depending on the prior artificial aging temperatures ranging from 400 °C to 500 °C. The natural age-hardening was found to strongly depend on the solute contents of Cu and Si in the Al matrix. This study provides fundamental insights into controlling the strength level of commercial Al–Si–Cu cast alloys with impurity elements using the cooling process after solution treatment at elevated temperatures above 400 °C.

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  65. Enhancement in strength and ductility of laser powder bed fused Al–12Si alloy by introducing nanoscale precipitates

    Mulin Liu, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    Additive Manufacturing Letters   Vol. 1   page: 100008 - 100008   2021.12

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    DOI: 10.1016/j.addlet.2021.100008

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  66. Controlling WC/Co two-phase microstructure of cemented carbides additive-manufactured by laser powder bed fusion: Effect of powder composition and post heat-treatment Reviewed

    Hiroyuki Ibe, Yuta Kato, Junya Yamada, Masaki Kato, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    Materials & Design   Vol. 210   page: 110034 - 110034   2021.11

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    DOI: 10.1016/j.matdes.2021.110034

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  67. Control of surface micro−structure for Al alloy/polymer joining fabricated by laser process using Al−Ti−C powders: Effect of powder composition. Reviewed

    Seung-Gwang Kim, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    Journal of Advanced Joining Processes   Vol. 4   page: 100068 - 100068   2021.11

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    DOI: 10.1016/j.jajp.2021.100068

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  68. Inhomogeneous Microstructure and its Thermal Stability of AlSi10Mg Lattice Structure Manufactured via Laser Powder Bed Fusion

    Mulin Liu, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    Materials Science Forum   Vol. 1016   page: 826 - 831   2021.10

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    The inhomogeneous microstructure and its change by annealing for an AlSi10Mg lattice structure with a body-centered cubic unit cell additively manufactured via laser powder bed fusion (LPBF) were investigated. The as-built lattice structure exhibited a cellular microstructure consisting of a number of primary α-Al phases decorated with α-Al/Si eutectic structure. The developed microstructure varied depending on the locations of the node and strut parts of the lattice structure. At the location near the bottom surface of the node part, the cellular microstructure became coarser and more equiaxed than those at the location near the top surface. At the location near the bottom surface of the strut part, the columnar α-Al phases were often elongated along the direction of the strut part. After the annealing at 300 °C for 2 h, numerous Si particles finely precipitated within the primary α-Al phases and coarsening of the eutectic Si phases occurred. After the annealing at 530 °C for 6 h, the microstructural characteristics changed significantly. A significant coarsening of the Si particles and the formation of Fe-containing intermetallic phase (Β-AlFeSi) with a plate-shaped morphology occurred. The microstructures became homogeneous in the whole area of the lattice structure annealed at 530 °C for 6 h.

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  69. Influence of added fourth elements on precipitation in heat-resistant Al-Mg-Zn ternary alloys

    Hiroki Ishii, Rikito Takagi, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    Journal of Japan Institute of Light Metals   Vol. 71 ( 7 ) page: 275 - 282   2021.7

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  70. In Situ X-Ray Observations and Microstructural Characterizations for Understanding Combustion Foaming and Reaction Processes to Synthesize Porous Al3Ti Composites From Al-Ti-B4C Powders Reviewed

    Inukai Takamasa, Suzuki Asuka, Takata Naoki, Kobashi Makoto, Okada Yuji, Furukawa Yuichi

    ADVANCED ENGINEERING MATERIALS   Vol. 23 ( 5 )   2021.5

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    The combustion foaming behaviors to synthesize closed-cellular porous Al3Ti composites are observed in situ using X-ray radioscopy. The in situ observation of the thermal explosion (TE) mode foaming reveals that the combustion foaming process consists of six steps. The shape of the sample changes uniformly in the first three steps before the sample foams. First, the sample expands uniformly 1) gradual expansion) and maintains an almost constant volume for a fixed period 2) temporary steady state at a constant volume). During these stages, bubbles are not generated inside the sample. Subsequently, the sample shrinks uniformly 3) slight shrinkage). After these three steps, the bubbles are rapidly generated inside the sample 4) rapid foaming). Immediately after foaming, the sample shrinks drastically while bubbles are ruptured and combined 5) severe shrinkage and bubble coarsening). Finally, the sample solidifies as a porous metal 6) solidification). The sample fabricated under the self-propagating high-temperature synthesis (SHS) mode includes graded microstructures corresponding to steps (1)-(4). The microstructures of the samples foamed under the TE and SHS modes are characterized. These results are used for discussing the elementary reaction steps arising at steps (1)-(4).

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  71. Critical resolved shear stress of activated slips measured by micropillar compression tests for single-crystals of Cr-based Laves phases Reviewed International coauthorship

    Xue Yunlong, Takata Naoki, Li Hongmei, Kobashi Makoto, Yuan Liang

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 806   2021.3

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    Single-crystal micropillar compression tests were performed in this study to investigate the mechanical properties and deformation mechanisms of Cr-based Laves phases. The results showed that, the activated slip system in the C15-Cr2Nb was exclusively the basal slip {111}< 110 >, transiting from the pyramidal slip {11 (2) over bar2}<(11) over bar 23 > to the prismatic slips {10 (1) over bar0}< 0001 > and {11 (2) over bar0}< 1 (1) over bar 00 > in the C14-Cr2Ta with the increased inclination angle. The average compressive strength of the C15-Cr2Nb changed between 10.0 GPa and 11.7 GPa, and that of the C14-Cr2Ta ranged within 11.6-12.4 GPa. The compressive strength changed due to the evolutions of activated slip systems in both Laves phases. The critical resolved shear stress (CRSS) of the C15-Cr2Nb was estimated as 4.4-4.6 GPa, which was lower than 5.1-6.1 GPa in the C14-Cr2Ta, and the higher CRSS of the C14-Cr2Ta resulted from higher shear modulus. The mechanical properties and deformation mechanisms obtained were helpful for better understanding and designing the Cr-based Laves phase alloys.

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  72. Understanding and suppressing shear band formation in strut-based lattice structures manufactured by laser powder bed fusion Reviewed

    Xiaoyang Liu, Takafumi Wada, Asuka Suzuki, Naoki Takata, Makoto Kobashi, Masaki Kato

    MATERIALS & DESIGN   Vol. 199   page: 109416   2021.2

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    DOI: https://doi.org/10.1016/j.matdes.2020.109416

  73. Understanding and suppressing shear band formation in strut-based lattice structures manufactured by laser powder bed fusion Reviewed

    Xiaoyang Liu, Takafumi Wada, Asuka Suzuki, Naoki Takata, Makoto Kobashi, Masaki Kato

    MATERIALS & DESIGN   Vol. 199   page: 109416   2021.2

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  74. Joint strength of Fe/epoxy resin hybrid structure via porous Fe/TiB2 composite layer synthesized by in-situ reaction process Reviewed

    Suzuki Asuka, Noritake Kazuki, Takata Naoki, Kobashi Makoto

    JOURNAL OF MATERIALS PROCESSING TECHNOLOGY   Vol. 288   2021.2

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    Fe/epoxy resin hybrid structures were fabricated via three-dimensional open-cellular porous Fe/TiB2 composite layers by an in-situ reaction synthesis process. Pores in the porous layer were filled with an epoxy resin to form an interpenetrating phase layer (IPL) consisting of epoxy resin and Fe/TiB2 composite. The relationship between the tensile joint strength perpendicular to the joint interface and structures of the porous layer was investigated. The tensile joint strength increased with increasing the roughness of an end surface of the porous layer but decreased when the surface roughness was higher than approximately 30 mu m. The decrement in the joint strength was caused by a transition of the fracture position from an epoxy resin/IPL interface to Fe/IPL, interface due to poor adhesiveness of the porous layer/Fe interface. A high-resolution X-ray computed tomography (CT) was utilized for investigating change in area fraction of the epoxy resin with depth from the end surface of the IPL. Based on the X-ray CT and fractography, it was revealed that the joint strength could be understood in view of epoxy resin/IPL interfacial strength at the fracture position estimated from the mixture law when the adhesiveness of the porous layer/Fe interface was enough. Based on the results above, an in-situ reaction induced from a functionally graded powder condition was applied for enhancing joint strength.

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  75. Effect of trace solute titanium on plastic deformation of alpha-(Fe, Cr) single-crystal micropillars fabricated from 18Cr ferritic stainless steel Reviewed

    Li Hongmei, Zhu Tianqi, Takata Naoki, Kobashi Makoto, Yoshino Masataka

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 803   2021.1

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    The effect of a trace amount (similar to 0.1 at.%) of solute Ti on the compression response of cylindrical single-crystal micropillars fabricated from a 18Cr ferritic stainless steel was investigated. The micropillars of the solution treated steel samples were fabricated on a special grain with different diameter ranges (d = 2-3 mu m or 5-6 mu m). By this process, the flow stress required for slip initiation (corresponding to the yield stress) and its strain rate dependence could be determined. The compression tests on the micropillars revealed that Ti addition (solute Ti in the alpha-(Fe, Cr) ferrite matrix) has a slight effect on the activated slip system and stress level required for the slip initiation of 18Cr steel specimens with two different sizes. In addition, the strain rate sensitivity (m) of the yield stress at an offset strain of 0.2% (0.2% proof stress) in the small micropillars (d = 2-3 mu m) of the micron sized 18Cr steel specimens decreased slightly (from 0.12 to 0.08), owing to the Ti addition. However, the m value (0.04) of the large micropillars (d = 5-6 mu m) of the 18Cr steel is unaffected by Ti addition and is equivalent to the m value measured for millimeter-sized specimens (conventional bulk specimens). The low activation volume (v*) values (18-19 b3) were obtained for the small micropillars of both the 18Cr and Ti-added steels. For the large specimens, the v* value of the 18Cr steel decreased slightly from 50 b3 to 46 b3 owing to the Ti addition and is close to the value obtained from the millimeter-sized specimens. These results indicate that the trace amount of solute Ti has a slight effect on the thermal activation process for controlling the dislocation motion in the 18Cr ferritic stainless steels. The intriguing low activation volume in the small micropillars is discussed in comparison with the results of micron-scale specimens of various bcc metals and alloys.Y

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  76. Microstructure of Al-2.5 Fe Binary Alloy Fabricated by Laser Powder Bed Fusion Reviewed International journal

    Xing Qi, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    Materials Science Forum   Vol. 1016   page: 1175 - 1180   2021.1

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    In the present study, microstructural and crystallographic features of an Al-Fe binary alloy with a near eutectic composition (Al-2.5wt%Fe) fabricated by laser powder bed fusion (LPBF) process were examined. The LPBF processing for the Al-Fe alloy powder was conducted at room temperature using a 3D Systems ProX 200 operating at a laser power of 204 W and a laser scan speed of 0.6 m/s and 0.8 m/s to fabricate cube samples with high relative density above 99 %. The fabricated sample exhibited characteristic microstructure consisting of a number of melt pools in which the regions had locally melted and rapidly solidified by laser irradiation during the LPBF process. Numerous fine particles of Al-Fe intermetallics with a mean size below 100 nm were found within the α-Al matrix in the observed melt pools, whereas relatively coarsened particles were localized around melt pool boundaries. Electron backscatter diffraction (EBSD) analyses revealed a number of columnar α-Al grains with a mean size of approximately 10 µm. The LPBF-fabricated Al-Fe alloy exhibits a high hardness of approximately 90 HV, which is more than twice higher than the conventionally casted Al-Fe alloy.

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  77. Mechanical behavior of in-situ alloyed Ti6Al4V(ELI)-3 at.% Cu lattice structures manufactured by laser powder bed fusion and designed for implant applications Reviewed International coauthorship

    Vilardell A. M, Takezawa A, du Plessis A, Takata N, Krakhmalev P, Kobashi M, Albu M, Kothleitner G, Yadroitsava I, Yadroitsev I

    JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS   Vol. 113   page: 104130 - 104130   2021.1

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  78. Manufacturing and characterization of in-situ alloyed Ti6Al4V(ELI)-3 at.% Cu by laser powder bed fusion Reviewed International coauthorship

    Vilardell A. M, Yadroitsev I, Yadroitsava I, Albu M, Takata N, Kobashi M, Krakhmalev P, Kouprianoff D, Kothleitner G, du Plessis A

    ADDITIVE MANUFACTURING   Vol. 36   2020.12

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    Biofunctionalization of Ti6Al4V alloy with metallic agents like Ag or Cu is a promising approach to add antibacterial properties and thus to reduce the risk of implant failure. This research investigates the in-situ alloying of Ti6Al4V(ELI) with 3 at.% Cu powders using Laser Powder Bed Fusion (L-PBF). The morphology and geometrical characteristics of the single tracks and layers were studied. Laser powers of 170 W and 340 W, and scanning speeds ranging from 0.4 to 1.4 m/s and 0.8–2.8 m/s were implemented. Single track results showed balling effect and humping at high scanning speeds, 1.4 m/s and 1.6 m/s, for each laser powder respectively. Conversely, keyhole formation occurred at lower scanning speeds of 0.4–0.6 m/s for 170 W laser power, and below and 0.8 m/s for 340 W laser power. For both laser powers, single layers resulted in smoother surfaces at lower scanning speeds. These results were used for the development of optimal process parameters for 3D cubes with 99.9 % density. Optimal process parameters were found for 170 W and 340 W laser powders at 0.7−0.9 and 1.0–1.2 m/s scanning speeds, respectively. In-situ alloying by L-PBF was challenging and a homogeneous distribution of Cu within the alloy was hard to achieve. The increase in laser power from 170 to 340 W resulted in small increase in homogenization. Microstructural analyses after stress-relieving treatment showed the presence of α’ and β phases, as well as CuTi2 intermetallic precipitates. The finer microstructure together with CuTi2 intermetallic precipitates resulted in an increase in hardness. This study demonstrates the potential for printing in-situ alloyed Ti6Al4V(ELI)- 3 at.% Cu for biomedical applications. However, further studies are required to determine the effectiveness of antibacterial properties.

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  79. Effect of Annealing on Anisotropic Tensile Properties of Al-12%Si Alloy Fabricated by Laser Powder Bed Fusion Reviewed

    Liu Mulin, Wada Takafumi, Suzuki Asuka, Takata Naoki, Kobashi Makoto, Kato Masaki

    CRYSTALS   Vol. 10 ( 11 )   2020.11

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    In this study, we systematically investigated microstructures and tensile properties of an Al-12mass%Si alloy additive-manufactured by laser powder bed fusion (LPBF) process and subsequently annealed at various temperatures. Microstructure of the as-fabricated sample was characterized by a number of melt pools consisting of alpha-Al phases surrounded by Si eutectic phases. Fine Si precipitates were observed in the alpha-Al phase in the sample annealed at 200 degrees C. The eutectic Si phase appears to agglutinate, resulting in a coarsened Si phase formed at high temperatures above 300 degrees C. The initial cellular microstructure completely disappears and a number of coarsened Si phases and plate-shaped intermetallic phases (beta-AlFeSi) were formed in the sample annealed at 530 degrees C. However, the grain morphology of the alpha-Al matrix slightly changed after the annealing at high temperatures. The as-fabricated specimen showed a high strength above 400 MPa and a low ductility of below 10% in total elongation. The tensile ductility varied depending on the tensile direction. The annealed specimens exhibited a lower tensile strength and larger elongation, whereas the direction dependence of the tensile properties was less pronounced in the specimens annealed at higher temperatures. The anisotropic tensile ductility can be rationalized by preferential fractures occurred around melt pool boundaries.

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  80. Formation of multiple intermetallic phases in a hypereutectic Al-Fe binary alloy additively manufactured by laser powder bed fusion Reviewed

    Wang Wenyuan, Takata Naoki, Suzuki Asuka, Kobashi Makoto, Kato Masaki

    INTERMETALLICS   Vol. 125   2020.10

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    An attempt was made to additively manufacture an Al-Fe binary alloy sample with a hypereutectic composition of 15 wt% Fe using a laser powder bed fusion (LPBF) process. The LPBF-built Al-15Fe alloy sample exhibited a microstructure consisting of a number of melt pools in which regions had locally melted and rapidly solidified due to scanning laser irradiation during the LPBF process. The alpha-Al (fcc) matrix consists of a number of elongated grains with a mean size of approximately 10 mu m. These microstructural features correspond well to previous results of Al alloys additively manufactured by the LPBF process. It was found that relatively coarsened stable theta-Al13Fe4 phases with a length of a few micrometers were localized along the melt pool boundaries. Numerous spherical particles of a metastable Al-Fe intermetallic phase were finely distributed within the nanoscale eutectic microstructure consisting of alpha-Al and metastable Al6Fe phases inside the melt pools. The metastable phase formation corresponds well to the previous results on the rapidly solidified Al-Fe alloys. The refined multiple intermetallic phases produced by the LPBF process contribute to a high hardness of approximately 200 HV. The refined microstructure appeared stable at an elevated temperature of 300 degrees C. The high microstructural stability would sustain sufficient strength in a hostile environment for long-term periods of service at elevated temperatures above 200 degrees C. The present results were utilized to discuss the formation sequence of multiple Al-Fe intermetallic phases in rapid solidification by the LPBF process.

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  81. Laser powder bed fusion of a near-eutectic Al-Fe binary alloy: Processing and microstructure Reviewed

    Qi Xing, Takata Naoki, Suzuki Asuka, Kobashi Makoto, Kato Masaki

    ADDITIVE MANUFACTURING   Vol. 35   2020.10

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    This study focused on additive manufacturing (AM) of the Al-Fe binary alloy samples with a near-eutectic composition of 2.5 mass% Fe using the laser powder bed fusion (LPBF) process. The melt pool depth, relative density, and hardness of LPBF-fabricated Al-2.5Fe alloy samples under different laser power (P) and scan speed (v) conditions were systematically examined. The results provided optimum laser parameter sets (P = 204 W, v <= 800 mm s(-1)) for the fabrication of dense alloy samples with high relative densities > 99%. Additionally, Pv(-1/2), which is based on the deposited energy density model, was found to be a more appropriate parameter for additively manufacturing Al-2.5Fe alloy samples, and using it to simplify the relative densities of the samples made the determination of a threshold value for the laser parameters required to fabricate dense alloy samples. The microstructural and crystallographic characterization of the LPBF-built Al-2.5Fe alloy samples revealed a characteristic microstructure consisting of multi-scan melt pools that resulted from local melting and rapid solidification owing to laser irradiation during the LPBF process. Furthermore, a number of columnar grains with a mean width of similar to 21 mu m elongated along the building direction were also observed in the alpha-Al matrix. Numerous nano-sized particles of the metastable Al6Fe intermetallic phase with a mean size < 100 nm were finely dispersed in the alpha-Al matrix. The hardness of the refined microstructure produced by the LPBF process was high at similar to 90 HV, which is more than twofold higher than that of conventionally casted alloys that contain the coarsened plate-shaped Al13Fe4 intermetallic phase in equilibrium with the alpha-Al matrix.

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  82. Manufacturing Aluminum/Multiwalled Carbon Nanotube Composites via Laser Powder Bed Fusion Reviewed International coauthorship

    Lee Eo Ryeong, Shin Se Eun, Takata Naoki, Kobashi Makoto, Kato Masaki

    MATERIALS   Vol. 13 ( 18 )   2020.9

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    This study provides a novel approach to fabricating Al/C composites using laser powder bed fusion (LPBF) for a wide range of structural applications utilizing Al-matrix composites in additive manufacturing. We investigated the effects of LPBF on the fabrication of aluminum/multiwalled carbon nanotube (Al/MWCNT) composites under 25 different conditions, using varying laser power levels and scan speeds. The microstructures and mechanical properties of the specimens, such as elastic modulus and nanohardness, were analyzed, and trends were identified. We observed favorable sintering behavior under laser conditions with low energy density, which verified the suitability of Al/MWCNT composites for a fabrication process using LPBF. The size and number of pores increased in specimens produced under high energy density conditions, suggesting that they are more influenced by laser power than scan speed. Similarly, the elastic modulus of a specimen was also more affected by laser power than scan speed. In contrast, scan speed had a greater influence on the final nanohardness. Depending on the laser power used, we observed a difference in the crystallographic orientation of the specimens by a laser power during LPBF. When energy density is high, texture development of all samples tended to be more pronounced.

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  83. Morphology and mechanical properties of the T-Al6Mg11Zn11 phase in the eutectic microstructure of Al-Zn-Mg ternary alloys Reviewed

    Takata Naoki, Okano Taiki, Aikawa Motonari, Suzuki Asuka, Kobashi Makoto, Hagihara Koji

    INTERMETALLICS   Vol. 124   2020.9

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    We designed three Al-based cast alloys strengthened by T-Al6Mg11Zn11 intermetallic phases using a eutectic reaction (liquid alpha(fcc) + T) in the Al-Mg-Zn ternary system and then fabricated them using solidification processes. Thermodynamic assessment provided target alloy compositions of Al-26.5Zn-21.5 Mg (at%), Al-23.5Zn-22.5 Mg (at%), and Al-13Zn-28Mg (at%) with the alpha-Al (fcc) phase in equilibrium with the T phase with high fractions (>60%). All of the alloys exhibited regularly arrayed fibers of the alpha phase embedded in a T-phase matrix in alpha/T two-phase eutectic microstructures. A slight effect of phase compositions on the fibrous eutectic morphology was observed, whereas the volume fraction of the T phase could be controlled according to the thermodynamic assessments. The fibrous alpha phases had faceted interfaces of {111} planes with a surrounding T-phase matrix, suggesting a low interfacial energy of the alpha/T interfaces. The fabricated eutectic alloys exhibited a high Vickers hardness (>230 HV) and high yield strength at elevated temperatures above 250 degrees C. The Mg-rich alloy with a composition of Al-13Zn-28Mg (at%) exhibited a relatively lower hardness, responsible for the low hardness of the T phase with a Mg-rich composition. The Mg-rich alloy exhibited the plasticity at a lower temperature of 200 degrees C but comparatively lower strength at elevated temperatures above 250 degrees C. These results indicated that chemical composition strongly affected the mechanical properties of the T phase in the eutectic alloys. The present results provide important insights into control of the mechanical properties of Al-based eutectic alloys reinforced by the T intermetallic phase.

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  84. Compressive Properties of Al-Si Alloy Lattice Structures with Three Different Unit Cells Fabricated via Laser Powder Bed Fusion Reviewed International journal

    Liu Xiaoyang, Sekizawa Keito, Suzuki Asuka, Takata Naoki, Kobashi Makoto, Yamada Tetsuya

    MATERIALS   Vol. 13 ( 13 )   2020.7

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    In the present study, in order to elucidate geometrical features dominating deformation behaviors and their associated compressive properties of lattice structures, AlSi10Mg lattice structures with three different unit cells were fabricated by laser powder bed fusion. Compressive properties were examined by compression and indentation tests, micro X-ray computed tomography (CT), together with finite element analysis. The truncated octahedron- unit cell (TO) lattice structures exhibited highest stiffness and plateau stress among the studied lattice structures. The body centered cubic-unit cell (BCC) and TO lattice structures experienced the formation of shear bands with stress drops, while the hexagon-unit cell (Hexa) lattice structure behaved in a continuous deformation and flat plateau region. The Hexa lattice structure densified at a smaller strain than the BCC and TO lattice structures, due to high density of the struts in the compressive direction. Static and high-speed indentation tests revealed that the TO and Hexa exhibited slight strain rate dependence of the compressive strength, whereas the BCC lattice structure showed a large strain rate dependence. Among the lattice structures in the present study, the TO lattice exhibited the highest energy absorption capacity comparable to previously reported titanium alloy lattice structures.

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  85. 超硬合金粉末を用いたレーザ積層造形の微視組織形成過程

      Vol. 67 ( 6 ) page: 313 - 319   2020.6

  86. Formation Process of Microstructure in Laser Powder Bed Fusion with WC Cemented Carbide Powder

    IBE Hiroyuki, KATO Yuta, YAMADA Jyunya, KATO Masaki, SUZUKI Asuka, TAKATA Naoki, KOBASHI Makoto

    Journal of the Japan Society of Powder and Powder Metallurgy   Vol. 67 ( 6 ) page: 313 - 319   2020.6

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    In this paper, the microstructure formation process of WC cemented carbide manufactured by Laser Powder Bed Fusion (LPBF) was investigated with WC/25 wt%Co agglomerated and sintered powder. The internal structure of the as-built cemented carbide specimen was categorized into two regions. The first region included many pores and a unique microstructure which was not observed from the samples fabricated with conventional manufacturing methods. In this region, W<sub>2</sub>C and W<sub>3</sub>Co<sub>3</sub>C were formed due to a WC decomposition and an evaporation of graphite and Co during laser irradiation. On the other hand, the second region showed the similar microstructure to the conventional method. The microstructure of the first region revealed that the powder was completely melted during a laser scanning process. The precipitation process of W<sub>2</sub>C, W<sub>3</sub>Co<sub>3</sub>C, and Graphite phase was considered with calculated liquidus projection of a C-Co-W ternary phase diagram.

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  87. Effect of Heat Treatment on Gradient Microstructure of AlSi10Mg Lattice Structure Manufactured by Laser Powder Bed Fusion Reviewed International journal

    Liu Mulin, Takata Naoki, Suzuki Asuka, Kobashi Makoto

    MATERIALS   Vol. 13 ( 11 )   2020.6

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    The present study addressed the effect of heat treatment process on microstructure of an AlSi10Mg lattice structure with a body-centered cubic unit cell manufactured via laser powder bed fusion (LPBF). The as-manufactured lattice specimen exhibited a unique cellular structure composing of primary a-Al phases bounded by a-Al/Si eutectic microstructure. A gradient microstructure (continuous microstructural changes) was found in the node and strut portions composed of the lattice specimen. The microstructure appears more equiaxed and coarser with approaching the bottom surface of both portions. The continuous microstructural changes contributed to a variation in hardness measured at different locations in the as-manufactured lattice specimen. Si particles finely precipitate in the primary a-Al phases, and eutectic Si particle coarsening occurs at an elevated temperature of 300 °C. The microstructural coarsening is more pronounced at a higher temperature. A number of significantly coarsened Si particles and a stable Fe-containing intermetallic phase (b-AlFeSi) were observed at all locations in 530 °C solution-treated specimen. The homogenous microstructure results in a constant hardness value independent of the location in the lattice specimen. These results provide new insights to control the compressive properties of the AlSi10Mg lattice structure manufactured via LPBF by subsequent heat treatment processes.

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  88. Anomalous strengthening by supersaturated solid solutions of selectively laser melted Al-Si-based alloys Reviewed

    Takata Naoki, Liu Mulin, Kodaira Hirohisa, Suzuki Asuka, Kobashi Makoto

    ADDITIVE MANUFACTURING   Vol. 33   2020.5

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    To identify the dominant contributing factor in the anomalously high strength of Al-Si-based alloys fabricated by selective laser melting (SLM), microstructural characteristics of a SLM-built Al-10Si-0.3 Mg alloy (AlSi10Mg) and their changes upon annealing at elevated temperatures were investigated. The as-built AlSi10Mg alloy exhibits a peculiar microstructure comprising of a number of columnar alpha-Al (fcc) phase with concentrated Si in solution. Numerous nano-sized particles were observed within the alpha-Al matrix. At elevated temperatures, a number of Si phase (diamond structure) precipitates consumed the solute Si in the columnar alpha-Al phase, but the microstructure of the alpha-Al matrix changed slightly. After annealing at elevated temperatures, the tensile strength of the as-built AlSi10Mg alloy substantially decreased accompanied by a reduction in the strain hardening rate. The supersaturated solid solution of the alpha-Al phase containing numerous nano-sized particles enhanced the strain hardening, resulting in the anomalous strengthening of the SLM-built AlSi10Mg alloy. The microstructural features were formed due to rapid solidification at an extremely high cooling rate in the SLM process, which provides important insights into controlling the strength of Al-Si-based alloys fabricated by SLM.

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  89. Microstructure and compressive properties of porous hybrid materials consisting of ductile Al/Ti and brittle Al3Ti phases fabricated by reaction sintering with space holder Reviewed

    Suzuki Asuka, Kosugi Naoki, Takata Naoki, Kobashi Makoto

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 776   2020.3

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    The strain-hardening of cell wall in porous metals decreases the energy absorption properties. In order to suppress the strain hardening, porous hybrid materials consisting of ductile Al and Ti phases and brittle Al3Ti phase were synthesized by reaction sintering between Al and Ti powders with NaCl space holder. Changes in the porous structure and microstructure with sintering were investigated. Area fraction of Al3Ti phase formed at Al/Ti interface increased following the Johnson-Mehl-Avrami-Koromogrov (JMAK) equation of three-dimensional diffusion-controlled growth with zero nucleation rate. The growth of Al3Ti phase led to the formation of pores and cracks in cell wall by Kirkendall effect and volume shrinkage. Effect of microstructure on compressive properties of the porous Al/Al3Ti/Ti hybrids were also investigated. Porous hybrids consisting of α-Al matrix exhibited the plateau region with positive slopes due to the strain hardening of α-Al phase. Porous hybrids consisting of Al3Ti matrix exhibited the plateau region with the slope of almost zero, resulting in high energy absorption capacity and efficiency. Fractography revealed that crack propagated in brittle Al3Ti phase but arrested at α-Al phase. These results were used to discuss the microstructure for improving energy absorption properties.

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  90. In Situ Scanning Electron Microscopy Observation of Crack Initiation and Propagation in Hydroxide Films Formed by Steam Coating on Aluminum-Alloy Sheets Reviewed International journal

    Li Hongmei, Takata Naoki, Kobashi Makoto, Serizawa Ai

    MATERIALS   Vol. 13 ( 5 )   2020.3

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    Hydroxide film was formed on 6061 Al-alloy (Al-1.00Mg-0.62Si(wt.%)) sheets by steam coating with the temperature of 220 °C for 24 h. During bending test of the coated specimens, the crack initiation and propagation processes in the hydroxide film were investigated using in situ SEM observations. The hydroxide film formed exhibited a dual-layer structure composed of an inner amorphous layer and an outer polycrystalline γ-AlO(OH)-phase layer. On the compressively strained surface, lateral cracks are preferentially initiated inside the inner amorphous layer, and propagate either inside this layer or on its interface with the outer γ-AlO(OH) layer. Digital image correlation analyses of the in situ observed SEM images suggested that the concentrated tensile strain along the surface normal localized at some parts of the amorphous layer could contribute to the crack initiation. On the tensile-strained surface, a number of cracks were initiated inside the inner amorphous layer along the surface normal and propagate into the outer γ-AlO(OH) layer. No cracks were found along the interface of the amorphous layer with the Al-alloy substrate. As a result, the anticorrosion hydroxide film adhered on the Al sheet after bending deformation. Such strong adhesion contributes to the excellent corrosion resistance of the Al-alloy parts provided by the steam coating.

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  91. Effect of hot-press thermal history on joint strength of A5052/Polyamide-6 hybrid structure via a porous layer Reviewed

    Kim Seung-Gwang, Suzuki Asuka, Takata Naoki, Kobashi Makoto

    JOURNAL OF MATERIALS PROCESSING TECHNOLOGY   Vol. 276   2020.2

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    The influence of the joining temperature history on the mechanical behavior of an Al alloy (A5052)/Polyamide-6 (PA6) lap joint was investigated. PA6 is a semi-crystalline thermoplastic and its mechanical behavior depends on its crystalline properties, which are affected by thermal processing. The A5052/PA6 joining process was carried out at 215 °C using a hydraulic hot-press. The temperature was decreased from 215 °C to various pre-set temperatures at a cooling rate of about 2 °C/s followed by air cooling under the application of pressure. The crystallinity of PA6 and strength of the lap joint increased with a decrease in the joining temperature from 215 to 190 °C and remained constant at temperatures below 190 °C. The thermoanalytical examination revealed that the crystallinity increase was caused by slow cooling. The results demonstrated that slow cooling is an effectual approach to improve the bonding strength. The fractography analysis results showed that the fracture mode of PA6 changed from ductile to brittle with an increase in its crystallinity.

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  92. Anomalous size-dependent strength in micropillar compression deformation of commercial-purity aluminum single-crystals

    Naoki Takata, Soichiro Takeyasu, Hongmei Li, Asuka Suzuki, Makoto Kobashi

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 772   2020.1

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    An anomalously reduced size-dependent strength of commercial-purity aluminum (Al) single-crystal micropillars with diameters ranging approximately from 1 to 10 mu m is reported. High-purity Al (99.99%) single-crystal micropillars exhibited an obvious size dependence of the resolved shear stress for slip. The measured shear stress resolved onto a primary slip system (tau(i)) scaled by the shear modulus (G) and the pillar diameter (d) scaled by the Burgers vector (b) showed the following correlation: tau(i)/G = 0.33(d/b)(-0.63), which agreed well with previous works. However, the commercial-purity Al samples exhibited a lower power-law exponent (0.19) for their size-dependent strength, resulting in (tau(i)/G) = 0.006(d/b)(-0.19). TEM characterization revealed the local presence of Al-Fe intermetallic precipitates surrounded by relatively high-density dislocations in annealed commercial-purity Al samples. These results indicate the relatively high-density dislocations could be responsible for the reduced size-dependent strength, which was confirmed by the remarkably reduced size dependence of their resolved shear stress by prior cold rolling. The reduced size-dependent strength can be rationalized using the stochastic model of the dislocation source length. Thus, this study provides a new insight to allow the application of the micropillar compression test to commercially produced Al alloys.

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  93. Development of gradient microstructure in the lattice structure of AlSi10Mg alloy fabricated by selective laser melting

    Mulin Liu, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    Journal of Materials Science and Technology   Vol. 36   page: 106 - 117   2020.1

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    To identify the microstructural features of the lattice structures of Al alloys built via the selective laser melting (SLM) process, AlSi10Mg alloy with a body-centered cubic (BCC)-type lattice structure was prepared. Characteristic microstructures comprising melt pools with several columnar α-Al phases with <001 > orientations along the elongation direction and surrounded by eutectic Si particles were observed at all portions of the built lattice structure. In the node portions of the lattice structure, a gradient microstructure (continuous change in microstructure) was observed. The columnar α-Al phases were observed near the top surface of the node portion, whereas they became coarser and more equiaxed near the bottom surface, resulting in softening localized near the bottom surface. In the strut portions of the lattice structure, the columnar α-Al phases were elongated along the inclined direction of struts. This trend was more prevalent near the bottom surface. The α-Al phases became coarser and more equiaxed near the bottom surface as well. The aforementioned results were the basis of a discussion of the development of the gradient microstructure in lattice-structured Al alloys during the SLM process in terms of thermal conductivities at the boundaries between the manufactured (locally melted and rapidly solidified) portions and adjacent (unmelted) alloy powder.

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  94. Influence of Brazing Time on Liquid Migration and Cell Structure of Porous Aluminum

    Tomohito Kurosaki, Makoto Kobashi, Naoki Takata, Asuka Suzuki, Tadashi Minoda

    MATERIALS TRANSACTIONS   Vol. 61 ( 2 ) page: 368 - 374   2020

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  95. Strain Rate Sensitivity of Flow Stress Measured by Micropillar Compression Test for Single Crystals of 18Cr Ferritic Stainless Steel

    Tianqi Zhu, Hongmei Li, Naoki Takata, Makoto Kobashi, Masataka Yoshin

    ISIJ INTERNATIONAL   Vol. 60 ( 4 ) page: 774 - 781   2020

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    We have fabricated cylindrical single-crystal micropillars with different diameter (d) ranges of 2-3 mu m and 5-6 mu m on a specific grain in the 18Cr ferritic stainless steel with a ferrite single-phase microstructure. The initial strain rate at the onset of plastic deformation was controlled by variable loading rate in the used nanoindenter. The strain rate sensitivity of the stress required for the slip initiation were examined using the fabricated micropillars. The present compression tests addressed the shear stress on an activated single slip system of micron-scale single-crystals. Smaller-sized micropillars (d = 2-3 mu m) often exhibit intermittent strain bursts. The stress for slip initiation (after an elastic loading) changes depending on the initial strain rate, resulting in a high strain rate sensitivity (m) of 0.12. Larger-sized micropillars (d = 5-6 mu m) show a continuous yielding. A slight change in their yield stress depending on the initial strain rate provides a relatively low m of 0.04. It is similar to one of the millimeter-sized specimens measured by conventional tensile tests. These results provide new insights to optimize the specimen size for the micro pillar compression test applied for the 18Cr ferritic stainless steels.

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  96. Preparation and Magnetic Properties of Nano-Sized Iron Powder Particles Coated with Silica Film by Calcium Hydride Reduction Method

    Matsumoto, A; Sugiura, T; Kobashi, M; Yamamoto, S

    MATERIALS TRANSACTIONS   Vol. 61 ( 7 ) page: 1404 - 1408   2020

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  97. Adhesion properties of hydroxide films formed on the Al-Mg-Si aluminum alloy sheets prepared by steam coating process

    Hongmei Li, Naoki Takata, Makoto Kobashi, Ai Serizawa

    Keikinzoku Yosetsu/Journal of Light Metal Welding   Vol. 58   page: 102 - 106   2020

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    © 2020 Japan Light Metal Welding Association In this study, in order to evaluate the adhesion properties of the hydroxide film formed on 6061 alloy (Al-1Mg- 0.6Si (wt.%)) sheets prepared by steam coating, we examined the microstructure and cracking behavior of hydroxide film on Al alloy sheets prepared by steam coating at 220°C for 24 h. EBSD analyses revealed the steam-coated sample exhibits microstructure of a-Al matrix consisted of equiaxed grains with a mean grain size of approximately 20 mm. The studied sample exhibits high hardness of 79 HV due to the strengthening by the precipitates of nanoscale particles (Mg2Si). The observation for the surface morphologies revealed the hydroxide film consisted of a number of particles with a mean size of approximately 300 nm and cross-sectional microstructural observations identified a continuous hydroxide film with a thickness of approximately 1.2 mm. The XRD measurement demonstrated the formed hydroxide film consisted of the g-AlO(OH) phase. Minute microstructure analyses revealed that the hydroxide film exhibits a dual layer structure consisting of g-AlO(OH) crystalline layer on the surface and a continuous Al-rich layer on the Al alloy. The cracking and delamination behavior of the hydroxide film were examined by bending test. It was found that the local delamination of g-AlO(OH) phase would occur under compressive stress rather than tensile stress, whereas the delamination of the hydroxide film from the Al alloy substrate was not observed. These results indicate that the hydroxide film prepared by steam coating has a remarkable adhesion strength on the Al alloy substrate.

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  98. アルミニウム合金粉末のレーザ積層造形に伴う組織形成の理解に向けて

      Vol. 66 ( 12 ) page: 573 - 580   2019.12

  99. アルミニウム合金粉末のレーザ積層造形に伴う組織形成の理解に向けて

      Vol. 66 ( 12 ) page: 573 - 580   2019.12

  100. Topology optimization and characterization of Ti6A14V ELI cellular lattice structures by laser powder bed fusion for biomedical applications

    Vilardell, AM; Takezawa, A; du Plessis, A; Takata, N; Krakhmalev, P; Kobashi, M; Yadroitsava, I; Yadroitsev, I

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 766   2019.10

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  101. Effects of Heat Treatments on Compressive Deformation Behaviors of Lattice‐Structured AlSi10Mg Alloy Fabricated by Selective Laser Melting

    Asuka Suzuki, Keito Sekizawa, Mulin Liu, Naoki Takata, Makoto Kobashi

    Advanced Engineering Materials   Vol. 21 ( 10 ) page: 1900571 - 1900571   2019.10

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  102. Synthesis and structural control of Fe-based porous layer on Fe substrate for joining with resin parts using combustion reaction

    Asuka Suzuki, Kazuki Noritake, Naoki Takata, Makoto Kobashi

    Advanced Powder Technology   Vol. 30 ( 10 ) page: 2101 - 2109   2019.10

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    DOI: 10.1016/j.apt.2019.06.024

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  103. レーザ積層造形技術が生み出すアルミニウム合金造形体の特異な組織形成

      Vol. 91 ( 9 ) page: 612 - 617   2019.9

  104. レーザ積層造形技術が生み出すアルミニウム合金造形体の特異な組織形成

      Vol. 91 ( 9 ) page: 612 - 617   2019.9

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  105. CaH2還元によるSiO2被覆Feナノ粒⼦の合成と磁気特性

      Vol. 66 ( 9 ) page: 429 - 433   2019.9

  106. CaH2還元によるSiO2被覆Feナノ粒⼦の合成と磁気特性

      Vol. 66 ( 9 ) page: 429 - 433   2019.9

  107. Microstructure and cracking behavior of hydroxide films formed on aluminum-alloy sheets prepared by steam coating

    Hongmei Li, Naoki Takata, Makoto Kobashi, Ai Serizawa

    Materials Science and Engineering A   Vol. 764   2019.9

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    © 2019 Elsevier B.V. To elucidate the adhesion properties of anticorrosion hydroxide films formed on aluminum (Al)-alloy sheets prepared by the steam coating process, cracks that propagated inside the hydroxide film formed on Al–Mg–Si alloy (6061 grade) sheets were characterized. Continuous hydroxide films with different thicknesses of 0.7 μm and 1.4 μm formed at different temperatures of 180 °C and 200 °C, respectively. Microstructural characterizations revealed that these hydroxide films exhibited a dual-layer structure consisting of a polycrystalline γ-AlO(OH) layer (on the surface side) and a continuous amorphous layer (on the Al-alloy side). Bending tests caused numerous cracks inside the hydroxide films under tension and compression. On the tensile-strained surface, numerous vertical cracks penetrated through the hydroxide films, although their delamination was not observed. On the compressive-strained surface, local delamination of the upper γ-AlO(OH) layer occurred. However, cracks were not observed in the lower amorphous layer on the Al-alloy substrate deformed under compression. These results indicate that the dual-layer-structured hydroxide film prepared by steam coating exhibits remarkable adhesion to the Al-alloy substrate.

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  108. Joining of metals and polymers using powder metallurgy with laser irradiation

    Seung-Gwang Kim, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    Journal of Materials Processing Technology   Vol. 270   page: 1 - 7   2019.8

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  109. Design of laser parameters for selectively laser melted maraging steel based on deposited energy density

    Asuka Suzuki, Ryoya Nishida, Naoki Takata, Makoto Kobashi, Masaki Kato

    Additive Manufacturing   Vol. 28   page: 160 - 168   2019.8

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  110. Formation of Fe<sub>2</sub>Al<sub>5</sub> Phase Layer on Fe-Si Alloy Sheets Hot-Dipped in Zn-0.2Al Alloy Melt

    Naoki Takata, Kunihisa Hayano, Asuka Suzuki, Makoto Kobashi

    Tetsu-to-Hagane   Vol. 105 ( 7 ) page: 701 - 708   2019.7

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  111. Formation sequence of Fe–Al intermetallic phases at interface between solid Fe and liquid Zn–6Al–3Mg alloy

    Hiroki Yokoi, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    Intermetallics   Vol. 109   page: 74 - 84   2019.6

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    DOI: 10.1016/j.intermet.2019.03.011

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  112. Effect of powder blending ratio on porous structure formed by combustion synthesis reaction between Ni and Al together with space holder Reviewed

    Yunmao Shu, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    Journal of Functionally Graded Materials   Vol. 33   page: 38 - 43   2019.5

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  113. ろう付用Al–Si系合金材を用いたポーラスアルミニウムの接合におけるポーラスアルミニウムの気孔構造変化と液相の挙動

      Vol. 69 ( 2 ) page: 93 - 100   2019.2

  114. ろう付用Al–Si系合金材を用いたポーラスアルミニウムの接合におけるポーラスアルミニウムの気孔構造変化と液相の挙動

      Vol. 69 ( 2 ) page: 93 - 100   2019.2

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  115. Fabrication of porous NiAl intermetallic compounds with a hierarchical open-cell structure by combustion synthesis reaction and space holder method Reviewed

    Yunmao Shu, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    Journal of Materials Processing Technology   Vol. 264   page: 182 - 189   2019.2

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  116. Transmission Electron Microscopic Observation of Layered Double Hydroxide Films Formed on Aluminum Alloys Prepared by Steam Coating Process

    Takata Naoki, Li Hongmei, Kobashi Makoto, Shimada Yuta, Serizawa Ai, Ishizaki Takahiro

    Tetsu-to-Hagane   Vol. 105 ( 2 ) page: 177 - 182   2019.2

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    <p>Microstructures and crystallographic features of layered double hydroxide (LDH) particles and the LDH film formed on the aluminum alloy sheet (alloy 7075) using the steam coating process were examined by transmission electron microscopy (TEM). The LDH powder particles exhibited a hexagonal-disc-shape morphology. Their disc plane and side planes were parallel to a basal plane and prism planes of the LDH hexagonal crystal, respectively. A cross-sectional thin TEM sample was prepared from the interface between the LDH film and the Al alloy substrate using a focused ion beam combined with pick-up technique. TEM observations revealed that the LDH film formed on the Al alloy exhibited a dual-layer structure, which consists of a continuous Zn-rich amorphous layer (including numerous nano-particles with fcc structure) on the Al substrate side and a LDH layer composed of a number of disc-shaped LDH particles.</p>

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  117. Synthesis of porous Al/Al3Ti composite with hierarchical open–cell structure for combining with phase change material Reviewed

    Asuka Suzuki, Shohei Miyake, Wataru Naruse, Naoki Takata, Makoto Kobashi

    Journal of Alloys and Compounds   Vol. 770   page: 1100 - 1111   2019.1

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    DOI: 10.1016/j.jallcom.2018.08.211

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  118. Microstructure and strength of a novel heat-resistant aluminum alloy strengthened by T-Al6Mg11Zn11 phase at elevated temperatures Reviewed

    Naoki Takata, Masato Ishihara, Asuka Suzuki, Makoto Kobashi

    Materials Science & Engineering A   Vol. 739   page: 62 - 70   2019.1

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  119. Microstructure and Mechanical property of Porous Nickel aluminides Fabricated by Reactive Synthesis with Space Holder Powder

    Yunmao Shu, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    MRS Advances   Vol. 4 ( 25-26 ) page: 1515 - 1521   2019

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    DOI: 10.1557/adv.2019.153

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  120. Tensile Properties of a Heat-Resistant Aluminium Alloy Strengthened by T-Al6Mg11Zn11 Intermetallic Phase

    Satoshi Nakatsuka, Masato Ishihara, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    MRS Advances   Vol. 4 ( 25-26 ) page: 1485 - 1490   2019

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    DOI: 10.1557/adv.2019.107

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  121. 460°CにおけるFe-Si合金/純Zn浴の特異な固液界面反応

      Vol. 105 ( 7 ) page: 693 - 700   2019

  122. 水蒸気プロセスにより作製したアルミニウム合金表面の層状複水酸化物皮膜の透過電子顕微鏡観察

      Vol. 105 ( 2 ) page: 299 - 303   2019

  123. 溶融Zn-0.2Al浴に浸漬したFe-Si合金におけるFe2Al5 相の形成

      Vol. 105 ( 7 ) page: 701 - 708   2019

  124. 460°CにおけるFe-Si合金/純Zn浴の特異な固液界面反応

      Vol. 105 ( 7 ) page: 693 - 700   2019

  125. Finite element simulation for selective laser melting of AlSi10Mg alloy powder bed layers

    OIDE Kai, KOBAYASHI Takaya, TAKATA Naoki, KOBASHI Makoto

    The Proceedings of The Computational Mechanics Conference   Vol. 2019.32   page: 096   2019

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    In recent years, fabricating with a 3D printer has become common, but it is essential to understand the process of melting and solidification in order to obtain accurate information on its strength. It is not easy to obtain the information in the process of fabricating, so it has been estimated by visual observation of the fabricated samples. In this study, the process of selective laser melting (SLM) is reproduced by finite element simulation for AlSi10Mg alloy samples with different widths by Takata et al.<sup>(1)</sup>, and the process is clarified though it is within the qualitative range.

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  126. Structural design and bonding strength evaluation of Al/epoxy resin joint via interpenetrating phase layer Reviewed

    Asuka Suzuki, Yuta Arai, Naoki Takata, Makoto Kobashi

    Journal of Materials Processing Technology   Vol. 262   page: 11 - 18   2018.12

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  127. Microstructural characterization of cellular AlSi10Mg alloy fabricated by selective laser melting Reviewed

    Mulin Liu, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    Materials and Design   Vol. 157   page: 478 - 491   2018.11

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    DOI: 10.1016/j.matdes.2018.08.005

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  128. Size dependence of microstructure of AlSi10Mg alloy fabricated by selective laser melting Reviewed

    Naoki Takata, Hirohisa Kodaira, Asuka Suzuki, Makoto Kobashi

    MATERIALS CHARACTERIZATION   Vol. 143   page: 18 - 26   2018.9

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    In order to investigate the size dependence of microstructure of the AlSi10Mg alloy fabricated by selective laser melting (SLM) combined with a powder bed technique, plate-shaped AlSi10Mg alloy samples with various widths (ranging from approximately 10 mm to 0.3 mm) were produced in this study. All the fabricated samples exhibited characteristic microstructural morphologies consisting of melt pools with columnar alpha-Al grains surrounded by fine eutectic Si particles, whereas their sample sizes had a relatively small effect on the texture and average grain size of the alpha-Al matrix. However, the formation of fine Si precipitates inside the columnar alpha-Al grains was observed more often for the smaller-sized samples, which could be a possible dominant contributor to the observed softening of the sample by reducing sample size. The obtained results were utilized for discussing the size dependence of the strength of the SLM-manufactured porous alloy samples.

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  129. Kinetics of Zr-Al intermetallic compound formation during ultra-high vacuum magnetron sputter-deposition of Zr/Al2O3(0001) thin films

    Tanaka Koichi, Fankhauser Joshua, Zaid Hicham, Aleman Angel, Sato Masaki, Yu Dian, Ebnonnasir Abbas, Li Chao, Kobashi Makoto, Goorsky Mark S, Kodambaka Suneel

    ACTA MATERIALIA   Vol. 152   page: 34 - 40   2018.6

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  130. Crystallographic Features of Microstructure in Maraging Steel Fabricated by Selective Laser Melting Invited Reviewed

    Naoki Takata, Ryoya Nishida, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    Metals   Vol. 8 ( 6 ) page: 440   2018.6

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    This study characterizes the microstructure and its associated crystallographic features of bulk maraging steels fabricated by selective laser melting (SLM) combined with a powder bed technique. The fabricated sample exhibited characteristic melt pools in which the regions had locally melted and rapidly solidified. A major part of these melt pools corresponded with the ferrite (alpha) matrix, which exhibited a lath martensite structure with a high density of dislocations. A number of fine retained austenite (gamma) with a < 001> orientation along the build direction was often localized around the melt pool boundaries. The orientation relationship of these fine gamma grains with respect to the adjacent alpha grains in the martensite structure was (111)(gamma)/ /(011)(alpha) and [-101](gamma) / /[-1-11](alpha) (Kurdjumov-Sachs orientation relationship). Using the obtained results, we inferred the microstructure development of maraging steels during the SLM process. The results depict that new and diverse high-strength materials can be used to develop industrial molds and dies.

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  131. 高純度アルミニウム単結晶マイクロピラーの強度に及ぼす試験片寸法および形状の影響

      Vol. 68 ( 5 ) page: 250 - 256   2018.5

  132. Effect of Specimen Size and Shape on Strength and Deformation of High-Purity Aluminum Single-Crystal Micropillars Invited Reviewed

    Soichiro Takeyasu, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    Journal of The Japan Institue of Light Metals   Vol. 68 ( 5 ) page: 250-256 - 256   2018.5

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    In the present study, we have examined the compression response of single-crystal cylindrical micropillars with different diameters (approximately ranging from 1 to 10 µm) and shape parameters prepared on the sample surface of 4N purity aluminum (Al) sheets with the recrystallized microstructure. The compression tests for micropillars with various sizes demonstrated the flow stress of micropillars increases with decreasing pillar diameter. The observed size dependence of resolved shear stress for slip corresponds well to the previous studies on micropillars prepared from 3N and 5N purity Al sheets. The measured shear stress resolved onto a primary slip system (τ<sub>i</sub>) scaled by shear modulus (<i>G</i>) and the pillar diameter (<i>d</i>) scaled by Burgers vector (<i>b</i>) shows the following correlation: (τ<sub>i</sub>/<i>G</i>)=0.33(<i>d</i>/<i>b</i>)<sup>−0.63</sup>. The compression response of micropillars with different <i>d</i><sub>1</sub>/<i>d</i><sub>2</sub> (ratio of top diameter (<i>d</i><sub>1</sub>) to bottom diameter (<i>d</i><sub>2</sub>) of cylindrical micropillars) revealed higher <i>d</i><sub>1</sub>/<i>d</i><sub>2</sub> than 0.5 is required for precisely measuring the strength of cylindrical micropillars, which was confirmed by the observations of compressed micropillars.

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  133. Effect of layer thickness on bonding strength of Al/epoxy resin joints via interpenetrating phase layer Reviewed

    Asuka Suzuki, Yuta Arai, Naoki Takata, Makoto Kobashi

    JOURNAL OF MATERIALS PROCESSING TECHNOLOGY   Vol. 254   page: 338 - 345   2018.4

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    Open porous Aluminum (Al) layer was fabricated on Al substrate, and epoxy resin (epoxy) was infiltrated into the layer and cured. Al and epoxy formed "interpenetrating phase layer (IPL)", and interlocked three-dimensionally each other. The volume fraction of epoxy in the IPL was fixed at 0.8, and the effect of the thickness of the IPL (t(IPL)) on the tensile strength (sigma(j)) was investigated. sigma(j) increased when tin was in the range of 0-2 mm, and decreased when t(IPL) was 5 mm and 10 mm. Based on observations of fractured surfaces, this decrease in cri was due to incomplete infiltration of epoxy. When t(IPL) was in the range of 0-2 mm, separation of Al and epoxy and rupture of epoxy occurred at the epoxy/IPL interface edge, which was the starting point for the fracture. For t(IPL) < 0.5 mm, the area fraction of epoxy at the epoxy/IPL interface was lower than 0.8, resulting in significant stress concentration. tin needs to be higher than the pore diameter in the Al substrate. By controlling t(IPL), Al/IPL/epoxy joints were obtained with a tensile strength of 38.0 MPa.

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  134. Microstructure of intermetallic-reinforced Al-Based alloy composites fabricated using eutectic reactions in Al-Mg-Zn ternary system Reviewed

    Naoki Takata, Taiki Okano, Asuka Suzuki, Makoto Kobashi

    INTERMETALLICS   Vol. 95   page: 48 - 58   2018.4

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    We designed two types of Al-based alloy composites reinforced by eta-Zn2Mg (hexagonal) and T-Al6Mg11Zn11 (cubic) intermetallic phases using monovariant eutectic reactions in the Al-Mg-Zn ternary system and then attempted to fabricate them using solidification. Thermodynamic assessment revealed two alloy compositions of Al-18Mg-36Zn and Al-22.5Mg-23.5Zn (at%) with the alpha-Al (fcc) phase reinforced with high fractions (> 50%) of the eta and T phases. Both alloys exhibited fine two-phase eutectic microstructures consisting of alpha/eta and alpha/T phases, respectively. The morphology of the alpha-Al phase in the eutectic colonies varied from lamellae to fibers upon changing the neighboring intermetallic phase. These eutectic microstructures exhibit high stability at an elevated temperature of 300 degrees C. In addition, the size and spacing of the alpha-Al phase could be controlled by changing the cooling rate during solidification. The fabricated composites exhibited high hardness values exceeding 220 HV, which were much superior to those of conventional Al alloys. The calculated solidification path and component partitioning in the liquid phase during solidification provided insights into the solidification segregation of Zn element in the Al-18Mg-36Zn alloy. The Zn-enriched regions would enhance the local microstructural change at elevated temperatures, which confirmed by the microstructural observations of the alloy exposed at 300 degrees C.

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  135. Enhanced Interfacial Reaction of Fe–Si Alloy Sheets Hot-Dipped in Zn Melt at 460°C Reviewed

    Naoki Takata, Kunihisa Hayano, Asuka Suzuki, Makoto Kobashi

    ISIJ International   Vol. 58 ( 9 ) page: 1608 - 1615   2018

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  136. Design methodology for porous composites with tunable thermal expansion produced

    A. Takezawa, M. Kobashi

    Composites Part B   Vol. 131   page: 21-29   2017.12

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    DOI: https://doi.org/10.1016/j.compositesb.2017.07.054

  137. Design methodology for porous composites with tunable thermal expansion produced by multi-material topology optimization and additive manufacturing

    Akihiro Takezawa, Makoto Kobashi

    COMPOSITES PART B-ENGINEERING   Vol. 131   page: 21 - 29   2017.12

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    To realize negative thermal expansion (NTE), porous composites made of two materials with different coefficients of thermal expansion are being actively researched. NTE can be realized by taking advantage of the thermal deformation mechanisms of a composite material's internal geometry. However, in addition to negative thermal expansion, materials with anisotropic and large positive thermal expansion are also desirable for various applications. Also, additive manufacturing provides new ways to fabricate composites by layering multiple materials at arbitrary points in three-dimensional space. In this study, we developed a design methodology for porous composites, which showed defined thermal expansion characteristics, including negative and positive thermal expansion as well as isotropic and anisotropic thermal expansion. Our approach was tested based on the fabrication of a multi-material photopolymer by additive manufacturing. The internal geometries required to produce such characteristics were designed by topology optimization, which is the most effective structural optimization method for realizing macroscopic inward deformation and for maintaining stiffness. The designed structures were converted to three-dimensional models and fabricated by multi-material photopolymer additive manufacturing. Using laser scanning dilatometry, we measured the thermal expansion of these specimens, revealing well-ordered thermal expansion, from anisotropic positive thermal expansion to anisotropic negative thermal expansion, over a wide range of about -3 x 10(-4) K-1 to 1 x 10(-3) K-1. (C) 2017 Elsevier Ltd. All rights reserved.

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  138. Size Dependence of Microstructure of AlSi10Mg Alloy Fabricated by Selective Laser Melting Reviewed

    N.Takata, H.Kodaira, A.Suzuki, M.Kobashi

    Materials Characterization     2017.12

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    DOI: https://doi.org/10.1016/j.matchar.2017.11.052

  139. High-stiffness and strength porous maraging steel via topology optimization and selective laser melting

    Akihiro Takezawa, Yuichiro Koizumi, Makoto Kobashi

    Additive Manufacturing   Vol. 18   page: 194 - 202   2017.12

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    © 2017 Elsevier B.V. Recent additive manufacturing technologies can be used to fabricate porous metals with precise internal pore structures and effective performance. We use topology optimization to derive an optimal pore structure shape with high stiffness that is verified experimentally. The design maximizes the effective bulk modulus and isotropic stiffness, and the performance is compared with Hashin–Shtrikman (HS) bounds. The optimized structure is fabricated via selective laser melting of maraging steel, which is a high-strength, iron-nickel steel that cannot easily be made porous with conventional methods. The optimal porous structure achieved 85% of the performance of the HS upper bound in numerical simulations, and at least 90% of them were realized in compressive testing. Finally, the performance is discussed relative to that of other metals.

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  140. Effect of layer thickness on bonding strength of Al/epoxy resin joints via interpenetrating phase layer Reviewed

    A.Suzuki, Y.Arai, N.Takata, M.Kobashi

    Journal of Materials Processing Technology   Vol. 25   page: 338-345   2017.11

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  141. 金属粉末レーザ積層造形法によって作製されたAL-10Si-0.4Mg合金の組織と機械的性質 Invited Reviewed

    高田尚記, 小平寛久, 関沢圭人, 鈴木飛鳥, 小橋 眞

    軽金属   Vol. 67 ( 11 ) page: 582-588   2017.11

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  142. 化学反応を利用したアルミニウム基複合材料の製造方法 Invited Reviewed

    小橋 眞、高田尚記、鈴木飛鳥

    軽金属   Vol. 67 ( 11 ) page: 571-575   2017.11

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  143. Solid Fe/Liquid Zn Interfacial Reaction of Hot-Dip Galvanized Fe-Si Alloy Sheets Invited Reviewed

    Naoki Takata, Kunihisa Hayano, Asuka Suzuki, Makoto Kobashi

    Proceedings of GALVATEC2017 (11th International Conference on Zinc and Zinc Alloy Coated Steel Sheet)     page: 177-181   2017.11

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  144. 金属粉末レーザ積層造形法によって作製されたAL-10Si-0.4Mg合金の組織と機械的性質 Invited Reviewed

    高田尚記, 小平寛久, 関沢圭人, 鈴木飛鳥, 小橋 眞

    軽金属   Vol. 67 ( 11 ) page: 582-588   2017.11

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  145. 化学反応を利用したアルミニウム基複合材料の製造方法 Invited Reviewed

    小橋 眞, 高田尚記, 鈴木飛鳥

    軽金属   Vol. 67 ( 11 ) page: 571-575   2017.11

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  146. High-stiffness and strength porous maraging steel via topology optimization and selective laser melting

    A. Takezawa, Y. Koizumi, M. Kobashi

    Additive Manufacturing   Vol. 18   page: 194-202   2017.10

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    DOI: https://doi.org/10.1016/j.addma.2017.10.004

  147. Induction-Activated Self-propagating, High-temperature Synthesis of Nickel Aluminide

    M. Shekari, M. Adeli, A. Khobzi, M. Kobashi, N. Kanetake

    Advanced Powder Technology   Vol. 28   page: 2974-2979   2017.9

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  148. Induction-Activated Self-propagating, High-temperature Synthesis of Nickel Aluminide

    M. Shekari, M. Adeli, A. Khobzi, M. Kobashi, N. Kanetake

    Advanced Powder Technology   Vol. 28   page: 2974-2979   2017.9

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  149. Change in Microstructure of Selectively Laser Melted AlSi10Mg Alloy with Heat Treatments Reviewed

    N.Takata, H.Kodaira, K.Sekizawa, A.Suzuki, M.Kobashi

    Materials Science & Engineering A   Vol. 704   page: 218-228   2017.8

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  150. Change in Microstructure of Selectively Laser Melted AlSi10Mg Alloy with Heat Treatments Reviewed

    N.Takata, H.Kodaira, K.Sekizawa, A.Suzuki, M.Kobashi

    Materials Science & Engineering A   Vol. 704   page: 218-228   2017.8

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  151. 燃焼合成反応を利用したFe/TiB2複合材料の合成とポーラス化 Invited Reviewed

    伊藤 峻, 髙田 尚記, 小橋 眞

    粉体および粉末冶金   Vol. 64 ( 6 ) page: 288-294   2017.6

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  152. 燃焼合成反応を利用したFe/TiB2複合材料の合成とポーラス化 Invited Reviewed

    伊藤 峻, 髙田 尚記, 小橋 眞

    粉体および粉末冶金   Vol. 64 ( 6 ) page: 288-294   2017.6

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  153. Compressive properties of porous Ti-Al alloys fabricated by reaction Reviewed

    N. Takata, K. Uematsu, M. Kobashi

    Materials Science & Engineering A   Vol. 697   page: 66-70   2017.5

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  154. Implementation of DSC analysis in reaction kinetics during heating of Ti-50 at.%Al powder mixture Reviewed

    M. Adeli, S. H. Seyedein, M. R. Aboutalebi, M. Kobashi, N. Kanetake

    JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY   Vol. 128 ( 2 ) page: 867 - 874   2017.5

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    In this study, the reactions in Ti-50 at.%Al powder mixture upon heating at constant heating rates were studied using DSC analysis. Heating up the mixture resulted in melting of aluminum at temperatures close to its melting temperature, which was manifested as an endothermic peak in DSC curves. The melting of aluminum was the onset of an intense exothermic reaction, so-called combustion synthesis reaction which results in the formation of titanium aluminide. The shift in exothermic peak temperature in various linear heating rates was used to calculate the apparent activation energy according to Kissinger-type model-free methods. Heating rates of 10, 20, 30, 40, and 50 K min(-1) were used to estimate the activation energy based on DSC data. In order to study the effect of ball-milling on reaction behavior, the starting powder mixture was ball-milled for different times, and a comparison was made between non-ball-milled and ball-milled DSC curves. The results showed that ball-milling tends to diminish the endothermic peak of melting of aluminum and shift the exothermic reaction temperature to lower temperatures, apparently altering the mechanism from a solid-liquid to an almost solid-solid one. The activation energy of the process in the non-ball-milled state was found to be close to the activation energy of diffusion of aluminum in TiAl (220 kJ mol(-1)). However, the application of same model-free methods to the ball-milled samples showed unexpectedly increased values for activation energy. It would be appropriate to check other methods as well as for calculation of activation energy in the ball-milled systems.

    DOI: 10.1007/s10973-016-5982-9

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  155. Compressive properties of porous Ti-Al alloys fabricated by reaction Reviewed

    N. Takata, K. Uematsu, M. Kobashi

    Materials Science & Engineering A   Vol. 697   page: 66-70   2017.5

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  156. 粉末冶金法を利用したポーラス金属の製造プロセスおよび気孔構造制御 Invited Reviewed

    小橋 眞

    粉体および粉末冶金   Vol. 64 ( 2 ) page: 61-67   2017.3

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  157. 粉末冶金法を利用したポーラス金属の製造プロセスおよび気孔構造制御 Invited Reviewed

    小橋 眞

    粉体および粉末冶金   Vol. 64 ( 2 ) page: 61-67   2017.3

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  158. Porous metal produced by selective laser melting with effective isotropic Reviewed

    A. Takezawa, M.Kobashi, Y. Koizumi, M. Kitamura

    International Journal of Heat and Mass Transfer   Vol. 105   page: 564-572   2017.2

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  159. Porous metal produced by selective laser melting with effective isotropic thermal conductivity close to the Hashin-Shtrikman bound Reviewed

    Akihiro Takezawa, Makoto Kobashi, Yuichiro Koizumi, Mitsuru Kitamura

    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER   Vol. 105   page: 564 - 572   2017.2

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    Additive manufacturing may be a novel method for fabricating porous materials. These materials can achieve effective performance because of their internal geometries. Metal-additive manufacturing is expected to utilize thermal conduction materials and devices. We have developed a porous metal with effective isotropic thermal conductivity by using metal-selective laser melting additive manufacturing. The internal pore structure was designed by topology optimization, which is the most effective structural optimization technique to maximize effective thermal conductivity. The designed structure was converted to a three-dimensional STL model, which is a native digital format of additive manufacturing, and assembled as a test piece. Effective thermal conductivity was measured by a steady-state method in which the effective thermal conductivity was calculated from a one-dimensional temperature gradient and the heat flux of the test pieces. The test pieces showed an effective thermal conductivity close to the Hashin-Shtrikman or Maxwell-Eucken bound, which is the theoretical limit of effective performance with an error less than 10%. (C) 2016 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.ijheatmasstransfer.2016.10.006

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  160. Porous Ti-Al Intermetallic Based Alloys Fabricated by Pressure-Sintering Elemental Powders with a Space Holder Powder Reviewed

    N.Takata, K.Uematsu, M.Kobashi

    MRS advances   Vol. 2 ( 26 ) page: 1387-1392   2017.1

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    DOI: https://doi.org/10.1557/adv.2017.123

  161. Porous Ti-Al Intermetallic Based Alloys Fabricated by Pressure-Sintering Elemental Powders with a Space holder Powder Reviewed

    Naoki Takata, Keisuke Uematsu, Makoto Kobashi

    MRS ADVANCES   Vol. 2 ( 26 ) page: 1387 - 1392   2017

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    In the present study, we have attempted to produce the porous Ti-Al intermetallic based alloys by pressure-sintering of the elemental powders of Ti and Al through a combustion reaction, with a NaCl space holder to achieve the development of a highly porous structure. The powders of Ti (particle size: <45 pm) and Al (particle size: <45 pm) were mixed to various total compositions of Ti-0-40 Al (at.%), and NaCl (particle size: 300-400 mu m) was mixed with the Ti/Al powder to give a highly porous structure. The mixed powder was sintered at 700 degrees C: under a constant pressure of 30 MPa to form cylindrical specimens with a diameter of 20 mm. The soaking of the specimens in pure water allows for the removal of NaCl (with a volume fraction of 60 %) and the formation of the pores to achieve a controlled relative density of 0.4. The present process can produce porous Ti Al alloys with various compositions. In as-sintered Ti-AI specimens, an inhomogeneous microstructure consisting of Ti particles surrounded by the a Ti Al alloy layer (various Ti-Al intermetallic phases) was observed. The as-sintered specimens exhibited the brittle behavior under compression, which is independent of their Al content. However, in a Ti-20Al alloy heat-treated at 1300 degrees C, a nearly Ti3Al single-phase microstructure appeared in the porous specimen. The heat-treated porous Ti-20Al alloy shows both a high plateau-strength level of approximately 100 MPa and a high plateau-end strain over 50%, resulting in a high absorption energy. The present results demonstrate that controlling the microstructure for the formation of the Ti(3)AI single-phase would he an effective method to achieve high energy absorption capacity of the porous Ti Al alloy.

    DOI: 10.1557/adv.2017.123

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  162. Reactive processing of aluminum matrix composites

    Makoto Kobashi, Naoki Takata, Asuka Suzuki

    Journal of Japan Institute of Light Metals   Vol. 67 ( 11 ) page: 571 - 575   2017

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    DOI: 10.2464/jilm.67.571

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  163. Implementation of DSC analysis in reaction kinetics during heating of Ti-50 at.%Al powder mixture Reviewed

    M. Adeli, S. H. Seyedein, M. R. Aboutalebi, M. Kobashi, N. Kanetake

    J. Thermal Analysis and Calorimetry   Vol. 128 ( 2 ) page: 867-874   2016.12

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    DOI: DOI 10.1007/s10973-016-5982-9

  164. 圧縮ねじり加工における試料内せん断ひずみ分布に対する回転回数の影響 Reviewed

    久米 裕二, 本橋 雅和, 小橋 眞, 金武 直幸

    塑性と加工   Vol. 57 ( 664 ) page: 468-472   2016.5

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    DOI: https://doi.org/10.9773/sosei.57.468

  165. Growth and Characterization of Epitaxial Zr(0001) Thin Films on Al2O3(0001) Reviewed

    J. Fankhauser, M. Sato, D. Yu, A. Ebnonnasir, M. Kobashi, M. S. Goorsky, S. Kodambaka

    J. Vacuum Sci. & Tech. A   Vol. 34   2016

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    DOI: 10.1116/1.4961452

  166. 圧縮ねじり成形による Cu-Cr 混合粉末の低温固化成形と微視組織制御 Reviewed

    久米裕二, 高市祐太郎, 小橋 眞, 金武直幸, 他4名

    銅と銅合金   Vol. 54   page: 163-168   2015.9

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    DOI: 163-168

  167. Porous composite with negative thermal expansion obtained by photopolymer additive manufacturing Reviewed

    A. Takezawa, M. Kobashi, Y. Koizumi, M. Kitamura

      Vol. 3   2015.7

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    DOI: 10.1063/1.4926759

  168. X線CTを用いたシンタクティックフォーム/アルミニウムフォーム相互浸透複合材料の圧縮変形挙動の解析 Invited Reviewed

    成瀬 亘、近藤紗也子、小橋 眞、他3名

    軽金属   Vol. 64   page: 598-603   2014.10

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  169. Structural topology optimization with strength and heat conduction constraints Reviewed

    A.Takezawa, G.H. Yoon, S.H.Jeong, M.Kobashi, M.Kitamura

    Computer Methods in Applied Mechanics and Engineering     2014.4

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    DOI: 10.1016/j.cma.2014.04.003

  170. Combustion foaming of Al-Ti intermetallics studied in situ by fast X-ray radioscopy Invited Reviewed

    Y. Arakawa, C. Jiménez, F. García-Moreno, J. Banhart, M. Kobashi, et. al.

    Procedia Materials Science   Vol. 4   page: 268-272   2014

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  171. Hierarchical open cellular porous TiAl manufactured by space holder process Reviewed

    M.Kobashi, S.Miyake, N.Kanetake

    Intermetallics   Vol. 42   page: 32-34   2013.7

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    DOI: 10.1016/j.intermet.2013.04.017

  172. Foaming Behavior of Long Scale Al-Ti Intermetallic Foam by SHS Mode Combustion Reaction Reviewed

    Y.Arakawa M.Kobashi N.Kanetake

    Intermetallics   Vol. 41   page: 22-27   2013.5

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    DOI: 10.1016/j.intermet.2013.04.004

  173. 圧縮ねじり加工した過共晶Al-Si合金の機械的特性 Reviewed

    久米裕二、大田真一郎、小橋 眞、金武直幸

    軽金属   Vol. 63 ( 5 ) page: 182-187   2013.5

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  174. 圧縮ねじり加工によるAl-Fe合金の晶出物微細化と機械的特性 Reviewed

    久米裕二、大田真一郎、小橋 眞、金武直幸

    塑性と加工   Vol. 54 ( 625 ) page: 175-180   2013.2

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  175. 圧縮ねじり加工によるCu-Cr複相合金焼結体のクロム粒子微細化

    久米裕二、高市祐太郎、小橋 眞、金武直幸

    銅と銅後金   Vol. 51 ( 1 ) page: 25-30   2013.1

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  176. Effect of Elemental Powder Size on Foaming Behavior of NiTi Alloy Made by Combustion Synthesis Reviewed

    Y.Arakawa, M.Kobashi, N.Kanetake

    Materials   Vol. 5 ( 7 ) page: 1267-1274   2012.7

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  177. Effect of precursor's composition and thickness on foaming behavior of Al-Ti intermetallics in volume combustion and self-propagating high-temperature synthesis modes Reviewed

    M.Kobashi S.Murata N.Kanetake

    Materials Science Research   Vol. 1 ( 4 ) page: 1-10   2012.4

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  178. Fabrication of Porous Fe/TiB2 Composites by Reactive Precursor Method Reviewed

    O. Kato, M. Kobashi, N.Kanetake

    Journal of Materials Science Research   Vol. 1 ( 2 ) page: 110-118   2012.2

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  179. Effect of precursor's composition and thickness on foaming behavior of Al-Ti intermetallics in volume combustion and self-propagating high-temperature synthesis modes Reviewed

    M.Kobashi, S.Murata, N.Kanetake

    Journal of Materials Science Research   Vol. 1 ( 4 ) page: 1-10   2012

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  180. Effect of heat absorbing powder addition on cell morphology of porous titanium composite manufactured by reactive precursor method Reviewed

    M.Kobashi, Y.Kamiya, N.Kanetake

    Materials Science & Engineering A   Vol. 556   page: 388-394   2012

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  181. 研究,創造技術の歩みと展望 粉末材料・複合材料・ポーラス材料 Invited Reviewed

    金武 直幸、近藤勝義、 久保田正広、 佐々木 元、 小橋 眞、 北薗幸一、 鈴木進補

    軽金属   Vol. 61 ( 11 ) page: 678-683   2011.11

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  182. BN-アルミニウム間反応を利用したAlN基複合材料の合成におけるプロセス条件の影響 Reviewed

    小橋 眞、斎木健蔵、金武直幸

    日本金属学会   Vol. 75 ( 10 ) page: 525-531   2011.10

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  183. Evaluation of nitrogen conversion ratio on reaction between BN and aluminum Reviewed

    Makoto Kobashi, Kenzo Saiki, Naoyuki Kanetake

    Materials Transaction   Vol. 52 ( 10 ) page: 00-00   2011.10

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  184. SiO2/Mg間の燃焼反応および反応浸透による複合材料組織に及ぼす反応熱量の影響 Reviewed

    小橋 眞、山田裕磨、金武直幸

    軽金属   Vol. 61 ( 7 ) page: 310-315   2011.7

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  185. 燃焼合成NiTiのポーラス化に及ぼす発泡および吸熱助剤添加の影響 Reviewed

    荒川裕也、小橋 眞、金武直幸

    日本金属学会誌   Vol. 75 ( 7 ) page: 379-385   2011.7

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  186. Observation of foaming behavior for rolled sheet precursors made of various aluminum powders

    M.Kobashi, M.Noguchi, N.Kanetake

    Mat. Trans.   Vol. 52 ( 5 ) page: 934-938   2011.5

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  187. プリカーサ法による超軽量ポーラス金属および金属間化合物のプロセス技術 Reviewed

    小橋 眞、 金武直幸

    塑性と加工   Vol. 52 ( 2 ) page: 201-205   2011.2

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  188. Refinement of Grains and Second Phases in Aluminum Alloys by Compressive Torsion Processing Reviewed

    Yuji Kume, Makoto Kobashi, Naoyuki Kanetake

    Steel research international   Vol. 81 ( 9 ) page: 270-273   2010.9

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  189. Effect of elemental powder blending ratio on combustion foaming behavior of porous Al-Ti intermetallics and Al3Ti/Al composites Reviewed

    M.Kobashi, N.Inoguchi, N.Kanetake

    Intermetallics   Vol. 18   page: 1039-1045   2010

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  190. Combustion synthesis of porous TiC/Ti composite by a self propagating mode Reviewed

    M.Kobashi, D.Ichioka, N.Kanetake

    Materials   Vol. 3   page: 3939-3947   2010

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  191. A study on the combustion synthesis of titanium aluminide in the self-propagating mode Reviewed

    M. Adeli, S.H. Seyedein, M.R. Aboutalebi, M. Kobashi, N. Kanetake

    J Alloys and Compounds   Vol. 497   page: 100-104   2010

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  192. 無加圧浸透法によるAl2O3,Ti粒子強化Mg複合材料の組織と特性に及ぼすプリフォーム作製条件の影響 Reviewed

    小橋 眞、福田陽一、金武直幸

    軽金属   Vol. 60 ( 10 )   2010

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  193. Effects of Cu Powder Size on the Microstructure of TiB2/Cu Composites Fabricated by Reactive Infiltration Process Reviewed

    S.Kato, M.Kobashi, N.Kanetake

    Materials Science Forum   Vol. 654-656   page: 2724-2727   2010

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  194. Powder size effect on cell morphology of combustion synthesized porous Al3Ti/Al composite Reviewed

    M.Kobashi, N.Inoguchi, N.Kanetake

    Intermetallics   Vol. 18   page: 1102–1105   2010

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  195. Visualization and Quantification of Severe internal deformation on compressive torsion process Reviewed

      Vol. 654-656   page: 1247-1250   2010

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  196. 圧縮ねじり加工したAZ61マグネシウム合金の微視組織に及ぼす回転回数の影響 Reviewed

    筒井一輝、久米裕二、小橋 眞、金武直幸

    日本塑性加工学会誌   Vol. 51 ( 588 ) page: 38-42   2010

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  197. *Synthesis of Porous Al3Ti/Al composite and effect of precursor preparation conditions on cell morphology Reviewed

    N. InoguchiM. KobashiN.Kanetake

    Mat. Trans.   Vol. 50 ( 11 ) page: 2609-2614   2009.11

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  198. ポーラスマグネシウムの発泡特性および気孔性状に及ぼすプリカーサ加熱条件の影響 Reviewed

    小橋 眞前原一仁金武直幸

    軽金属   Vol. 59 ( 10 ) page: 261-264   2009.10

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  199. 圧縮ねじり加工によるアルミニウム切削屑の固相リサイクル Reviewed

    高橋、久米、小橋、金武

    軽金属   Vol. 59 ( 7 ) page: 354-358   2009.7

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  200. Self-propagating Foaming Process of Porous Al-Ni Intermetallics Assisted by Combustion Reaction Invited Reviewed

    M.Kobashi, K.Kudoh, N.Kanetake

    Materials   Vol. 2 ( 4 ) page: 2360-2368   2009.4

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  201. 板状ポーラスアルミニウムの発泡特性と気孔性状に及ぼす板厚拘束の影響 Reviewed

    小橋 眞,坂本憲昭,金武直幸

    軽金属   Vol. 58 ( 12 ) page: 7-12   2009.1

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  202. 圧縮ねじり加工したAZ61マグネシウム合金の微視組織に及ぼす回転回数の影響 Reviewed

    筒井一輝久米裕二小橋 眞金武直幸

    日本塑性加工学会誌   Vol. 51 ( 588 ) page: 38-42   2009

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  203. *燃焼合成法による超微細TiB2粒子生成過程の観察と微細化手法の検討 Invited Reviewed

    小橋 眞吉田 亘金武直幸

    軽金属   Vol. 58 ( 10 ) page: 491-496   2008.10

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    サブミクロンオーダーのセラミック粒子を金属母相中で直接合成する手法において、粒子サイズの制御手法を見出した。

  204. Foaming behavior of aluminum precursor produced from machined chip waste Reviewed

    N. Kanetake, M. Kobashi

      ( 10 ) page: 840-844   2008.10

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  205. *Reactive infiltration of TiN powder preform with molten Al for the fabrication of nitride ceramics composite Invited Reviewed

    Y. KobayashiM.KobashiN. Kanetake

    Mater. Trans   Vol. 49 ( 7 ) page: 1616-1620   2008.7

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    窒化アルミニウムを、既存技術より1000℃程度低温で成形する手法を開発した。

  206. *プリカーサ法によるポーラスアルミニウム充填構造体のプロセス技術 Invited Reviewed

    小橋 眞金武直幸

    まてりあ   Vol. 47 ( 04 ) page: 178-181   2008.4

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    ポーラス金属の応用開発技術の紹介

  207. 燃焼合成法による中空パイプ/Al3Niフォーム複合構造体の作製と気孔性状の解析 Invited Reviewed

    小橋 眞、金武直幸

    高温学会誌   Vol. 34 ( 2 ) page: 79-84   2008.2

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  208. 燃焼合成法によるポーラス材料の開発 Reviewed

    金武直幸、小橋 眞

    高温学会誌   Vol. 34 ( 02 ) page: 45-50   2008.2

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  209. 圧縮ねじり加工法による微細化組織の分布に及ぼすねじり負荷条件の影響 Reviewed

    久米裕二 小橋 眞 金武直幸

    日本塑性加工学会誌   Vol. 49 ( 1 ) page: 51-55   2008.1

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  210. Tensile Property of Hypereutectic Al-Si Alloy Re-fined by Compressive Torsion Processing

    Y. Kume, S. Tahara, M. Kobashi, N. Kanetake

      Vol. 1   page: 589-594   2008

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  211. Solid State Recycling of Aluminum Machined Chip Wastes by Compressive Torsion Processing

    N. Kanetake, M.Kobashi, Y.Kume

    Aluminium Alloys: Their Physical and Mechanical Properties   Vol. 1   page: 541-546   2008

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    Language:English   Publishing type:Research paper (scientific journal)  

  212. 圧縮ねじり加工法による結晶粒微細化に及ぼす加工温度と試料直径の影響 Reviewed

    久米裕二小橋 眞金武直幸

    日本塑性加工学会誌   Vol. 48 ( 11 ) page: 1007-1011   2007.11

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  213. Synthesis of Fine Ceramic Particles in Molten Aluminum by Combustion Reaction Reviewed

    W. Yoshida M.Kobashi N. Kanetake

    Mater. Trans.   Vol. 48 ( 9 ) page: 2374-2377   2007.9

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  214. Novel Processing of Porous Titanium Composite for Producing Open Cell Structure Reviewed

    M. KobashiN. Kanetake

      Vol. 26-28   page: 133-136   2007

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  215. Fabrication of Long Scale Aluminum Foam By Transfer Heat Foaming of Precursor Reviewed

    Fabrication of Long Scale Aluminum Foam By Transfer Heat Foaming of Precursor

    E. MizutaniM. KobashiN. Kanetake   Vol. 909-912   page: 2007   2007

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  216. Fabrication of Magnesium Foam by Precursor Method Using Machined Chips Reviewed

    K. MaeharaM. KobashiN. Kanetake

    Advanced Materials Research   Vol. 26-28   page: 905-908   2007

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  217. Effect of Powder Blending Ratio on Synthesis of TiB2 Particles by Al-Ti-B Combustion Reaction Reviewed

    W. YoshidaM. KobashiN. Kanetake

    Advanced Materials Research   Vol. 26-28   page: 325-328   2007

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  218. Fabrication of Oxide Ceramics Composite by Reactive Infiltration Process Reviewed

    Y. KobayashiM. KobashiN. KanetakeW. YoshidaM. KobashiN. Kanetake

    Advanced Materials Research   Vol. 26-28   page: 321-324   2007

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  219. Influence of Compressive Torsion Processing Temperature Microstructure Refinement and Property of Aluminum alloy Reviewed

    S.TaharaY. KumeM. KobashiN. Kanetake

    Advanced Materials Research   Vol. 26-28   page: 321-324   2007

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  220. Homogeneity of Grain Refinement of Aluminum Alloy with Compressive Torsion Processing Reviewed

    Y. KumeM. KobashiN. Kanetake

    Advanced Materials Research   Vol. 26-28   page: 107-110   2007

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  221. Effects of Processing Parameters on Pore Morphology of Combustion Synthesized Al-Ni Foams Invited Reviewed

    M. Kobashi, R.X. Wang, Y. Inagaki, N. Kanetake

    Mater. Trans.   Vol. 47 ( 9 ) page: 2172-2177   2006.9

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  222. Foaming and Filling-in Behavior of Porous Aluminum in Hollow Components Reviewed

    Mater. Trans.

    M. KobashiR. SatoN. Kanetake   Vol. 47 ( 9 ) page: 2178-2182   2006.9

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  223. Producing Technology of Aluminum Foam from Machined Chip Waste Reviewed

      Vol. 47 ( 9 ) page: 2125-2130   2006.9

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    アルミニウムフォーム(ポーラスアルミニウム)を化学反応を利用した自己構造化プロセスにより製造している。

  224. Fabrication of TiB2/Cu composites and simultaneous bonding with aluminum alloy using combustion reaction Reviewed

    Y.J.Kwon, M. Kobashi, N.Kanetake

      Vol. 70 ( 01 ) page: 34-42   2006.1

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  225. Innovative processing of porous and cellular materials by chemical reaction Reviewed

    N. Kanetake, M. Kobashi

    Scripta Materialia   Vol. 54   page: 521-525   2006

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  226. Microstructure Refinement of Al-Si alloy Using Compression Torsion Processing Reviewed

    Y.KumeM. KobashiN.Kanetake

    Mater. Sci. Forum   Vol. 519-521   page: 1441-1446   2006

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  227. Self-Blowing Process of Al Foam Assisted by Exothermic Reaction Reviewed

    M.Kobashi, N.Kanetake

    Mater. Sci. Forum   Vol. 519-521   page: 1335-1340   2006

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  228. Cell structure control of porous titanium composite synthesized by combustion reaction Invited Reviewed

    N. Kanetake, K. Kuze, M. Kobashi

    Advanced Engineering Materials   Vol. 8 ( 9 ) page: 836-840   2006

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  229. ポーラス金属の現状と今後の展開 Invited Reviewed

    小橋 眞

    軽金属   Vol. 55 ( 7 ) page: 327-332   2005

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    各種ポーラス金属の特徴、プロセス技法、アプリケーションについて解説している。

  230. Effect of Powder Blending Ratio on Pore Morphology of Combustion Processed Al-Ni Foams

    R.Wang, M.Kobashi, N.Kanetake

    Advanced Materials Research   Vol. 16-18   page: 53-56   2005

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  231. Foaming Behavior of Precursors Made of Various Kinds of Al Alloy Powder

    M.Ohta, M. Kobashi N. Kanetake

      Vol. 4   page: 111-114   2005

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  232. Effects of Processing Parameters on Pore Morphology of Combustion Synthesized Al-Ni Foams

    N. Kanetake, M.Kobashi, R.X.Wang

      Vol. 4   page: 177-180   2005

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  233. Technology of Producing Aluminum Foam from Machined Chips

    S. Tsuda M. Kobashi N. Kanetake

      Vol. 4   page: 337-340   2005

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  234. Fabrication of copper matrix composites and simultaneous bonding with aluminum alloy using combustion reaction of Cu-Ti-B system

    Y.J.kwon, M.Kobashi, N.Kanetake

    Mater. Trans.   Vol. 45 ( 11 ) page: 3163-3171   2004.11

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  235. 燃焼合成と溶湯撹拌の組合せによるTiC粒子強化アルミニウム複合材料の作製

    尾村直樹、 小橋 眞、 金武直幸

    日本金属学会誌   Vol. 68 ( 6 ) page: 367-371   2004.6

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  236. 燃焼合成と溶湯撹拌の組合せによるTiC/6061アルミニウム合金複合材料の作製

    尾村直樹、 小橋 眞、 金武直幸

    日本金属学会誌   Vol. 68 ( 4 ) page: 211-215   2004.4

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  237. Fabrication and simultaneous bonding of metal matrix composite by combustion synthesis reaction

    Y.J.kwon, M.Kobashi, N.Kanetake

    Scripta Mater.   Vol. 50   page: 577-581   2004

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  238. Al-TiH2混合粉末プリカーサの加熱によるポーラスアルミニウムの発泡過程

    小橋 眞、 棚橋伸也、 金武直幸

    軽金属   Vol. 53 ( 10 ) page: 427-432   2003.10

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  239. Formability of AZ91D alloy by casting-forging process

    T.Mohri, T.Nishiwaki. M.Kobashi, N.Kanetake

    Mater. Sci. Forum   Vol. 419 ( 4 ) page: 377-381   2003

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  240. 反応浸透法によるTiC粒子強化アルミニウム複合材料の作製

    尾村直樹、 小橋 眞、 長 隆郎、 金武直幸

    日本金属学会誌   Vol. 66 ( 12 ) page: 1317-1324   2002.12

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  241. Fabrication of TiB2/Al composites by combustion synthesis of Al-Ti-B system

    Y.J.Kwon, M.Kobashi, T.Choh, N.Kanetake

      Vol. 43 ( 11 ) page: 2796-2801   2002.11

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  242. Processing of Intermetallics Foam by Combustion Reaction

    M.Kobashi, N.Kanetake

    Advanced Engineering Materials   Vol. 4 ( 10 ) page: 745-747   2002.10

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  243. Synthesis of TiC/Aluminum composite by reactive infiltration process

    Mater. Sci. Forum   Vol. 396 ( 4 ) page: 271-276   2002

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  244. Al-Ti-B系の燃焼合成法を利用したTiB2/Al複合材料の作製

    権ヨングジャイ、 小橋 眞、 長 隆郎、 金武直幸

    軽金属   Vol. 51 ( 7 ) page: 351-355   2001.5

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  245. Wetting of alumina, iron and stainless steel substrates by molten magnesium

    W.Shi, M.Kobashi, T.Choh

      Vol. 92 ( 4 ) page: 382-385   2001.4

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  246. Cu-Ti-C系の燃焼合成反応によるTiC/Cu複合材料の作製

    権ヨングジャイ、 小橋 眞、 長 隆郎、 金武直幸

    日本金属学会誌   Vol. 65 ( 4 ) page: 273-278   2001.4

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  247. Wetting of Alumina, Iron and Stainless Steel Substrates by Molten Magnesium Reviewed

    Shi Wen, Kobashi Makoto, Choh Takao

    INTERNATIONAL JOURNAL OF MATERIALS RESEARCH   Vol. 92 ( 4 ) page: 382 - 385   2001.1

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    DOI: 10.3139/ijmr-2001-0074

    Web of Science

  248. 炭素およびAlN上における溶融マグネシウムの濡れ

    石ウェン、 小橋 眞、 長 隆郎

    日本金属学会誌   Vol. 64 ( 5 ) page: 335-338   2000.5

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  249. 黒鉛およびAlNの溶融マグネシウムによる濡れ

    日本金属学会誌   Vol. 64   page: 335-338   2000

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  250. 濡れ性評価に基づくアルミナ短繊維強化マグネシウム複合材料の作製とその圧縮強度

    軽金属   Vol. 49   page: 291-295   1999

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  251. 燃焼合成法による銅基複合材料の合成とアルミニウムとの同時接合

    日本金属学会誌   Vol. 63   page: 1109-1112   1999

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  252. Effect of Wettability and Powder Premixing on the Spontaneous Infiltration of Molten Mg into Alumina Fiber Preform

    Z. Netal.   Vol. 90   page: 294-298   1999

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  253. Synthesis of AlN/Al alloy composites by in situ reaction between Mg3N2 and aluminum

    M.Kobashi, N.Okayama, T.Choh

      Vol. 38 ( 3 ) page: 260-265   1997.3

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  254. Synthesis of Al2O3 matrix composites by reactive infiltration

    M.Kobashi, T.Choh

    J. Mater. Sci.   Vol. 32   page: 6279-6282   1997.3

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  255. Synthesis of boride and nitride ceramics in molten aluminum by reactive infiltration

    J. Mater. Sci.   Vol. 32   page: 6283-6289   1997

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  256. Fabrication and analysis of in situ formed boride/Al composites by reactive spontaneous infiltration

    Scripta Materialia   Vol. 37   page: 605-614   1997

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  257. Synthesis of boride and nitride ceramics in molten aluminum by reactive infiltration

    M.Kobashi, T.Choh

    J. Mater. Sci.   Vol. 32   page: 6283-6289   1997

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  258. Synthesis of AI2O3 matrix composites by reactive infiltration

    J. Mater. Sci.   Vol. 32   page: 6279-6282   1997

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  259. Synthesis of AIN/AL alloy composites by in situ reaction between Mg3N2 and Aluminum

    Materials Transactions, JIM   Vol. 38 ( 3 ) page: 260-265   1997

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  260. Synthesis of TiB2 dispersed alloys by self-propagating high- temperature reaction

    M.Kobashi, H.Tsukahara, T.Choh

      Vol. 4   page: 44-49   1997

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  261. Fabrication of intermetallic compound matrix composite by spontaneous infiltration and subsequent in situ reaction processes

    T.Choh, T.Mohri, M.Kobashi

    Journal of Mater. Processing Tech.   Vol. 63 ( 1-3 ) page: 379-383   1997

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  262. Fabrication and analysis of an in situ TiB2/Al composite by reactive spontaneous infiltration

    Scripta Materialia   Vol. 34 ( 8 ) page: 1257-1266   1996.8

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  263. 無加圧浸透現象を利用した金属間化合物複合材料の作製と圧縮特性

    毛利 猛、 小橋 眞、 金武 直幸、 長 隆郎

    日本金属学会誌   Vol. 60 ( 7 ) page: 653-659   1996.7

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  264. TaC粒子強化Al合金複合材料の引張特性とその計算予測

    毛利 猛、 小橋 眞、 金武 直幸、 長 隆郎

    日本金属学会誌   Vol. 60 ( 5 ) page: 504-511   1996.5

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  265. Effect of alloying elements in the brazing sheet on the bonding strength between Al2O3 and aluminum

    M. Kobashi, T.Ninomiya, N.Kanetake, T.Choh

      Vol. 34 ( 3 ) page: 415-420   1996.3

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  266. Synthesis of TiB2 dispersed sluminum alloys by the delf-propagating high-temperature reaction

      Vol. 146 ( 9 ) page: 444-449   1996

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  267. Synthesis of composite materials by infiltration of IVa, Va metals and BN powder mixtures with molten aluminum

      Vol. 146 ( 12 ) page: 638-643   1996

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  268. Effect of alloying elements in the brazing sheet on the bonding strength between AI2O3 and aluminum

    Scripta Materialia   Vol. 34 ( 3 ) page: 415-420   1996

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  269. Grain refing of the aluminum alloy by reaction synthesized TiB2-disperded alloys

      Vol. 146 ( 10 ) page: 473-478   1996

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  270. Fabrication of metal matrix composite by spontaneous infiltration and subsequent in situ reaction processes

    T. Choh, M. Kobashi, H. Nakata

      Vol. 217   page: 353-358   1996

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  271. Effect of alloying elements on SiC dispersion in liquid aluminum Reviewed

    M. Kobashi, T. Choh

    Materials Transaction   Vol. 31 ( 12 ) page: 1101-1107   1995.12

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  272. Fabrication of AlN particulate aluminum matrix composite by a melt stirring method Reviewed

    E.N.Taheri, M.Kobashi, T.Choh

    Scripta Materialia   Vol. 32 ( 12 ) page: 1923-1927   1995.12

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  273. 粒子強化アルミニウムおよびAl-3%Mg合金複合材料の強度特性に及ぼす熱履歴の影響 Reviewed

    毛利 猛、 小橋 眞、 金武直幸、 長 隆郎

    軽金属   Vol. 45 ( 7 ) page: 379-384   1995.7

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  274. In situ processing of TiB2, AIN/AI composites by spontaneous infiltration technique and the hardness of the composites

      Vol. 45 ( 7 ) page: 397-402   1995

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  275. The effect of surface active elements on the wetting behavior of iron molted aluminum alloy.

    ISIJ International   Vol. 35 ( 5 ) page: 488   1995

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  276. Fabrication of in situ particle composite by injecting N2 gas into molten aluminum

    Proc. of ICCM/9     page: 809-815   1993

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  277. The wettability and the reaction for SiC/particle/Al alloy system

    J. Mater. Sci.   Vol. 28   page: 684-690   1993

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  278. Role of Mg and Ti on SiCp, ZrCp/Al composite of elevated temperatures

    J. Mater. Sci.   Vol. 28   page: 5707-5712   1993

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  279. Dispersion behavior of various carbides into molten Al and mechanical properties of TiC/Al composite

    Journal of Japan Institut of Light Metals.   Vol. 43 ( 10 ) page: 522-527   1993

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  280. The fabrication of particulate composite by in-situ oxidation process

    J. Japan Inst. of Light Metals   Vol. 42   page: 3   1992

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  281. Interfacial reaction and interfacial shear strength between CVD-SiC fiber and aluminum

    J. Japan Inst. of Light Metals   Vol. 42   page: 9   1992

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  282. Effect of alloying elements on the interfactial shear strength between CVD-SiC fiber and aluminum

    J. Japan Inst. of Light Metals   Vol. 42   page: 9   1992

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  283. Dispersion behaviors of SiC and ZrC particles in Metal Matrix Composite by melt stirring method

    Recent Advances in Sci. and Eng. of Light Metals     1991

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  284. Particulate incorporation process and uniformity of particulate distribution of the aluminum matrix composite manufactured by melt stirring method

    J. Japan Inst. Metals   Vol. 55   page: 1   1991

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  285. Effects of alloying elements on SiC dispersion in liquid aluminum

    J. Japan Inst. of Metals   Vol. 54   page: 1   1990

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  286. Effect of alloying element on TiC dispersion in aluminum matrix composite

    J. Japan Inst. of Metals   Vol. 54   page: 12   1990

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  287. Effect of alloying elements on ZrC particulate dispersion in liquid aluminum

    J. Japan Inst. Metals   Vol. 54   page: 8   1990

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Books 5

  1. 相互浸透層を利用した樹脂/金属の接合技術

    小橋 眞( Role: Joint author)

    (株)技術情報協会  2017.10 

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    Language:Japanese Book type:Scholarly book

  2. 相互浸透層を利用した樹脂/金属の接合技術

    小橋 眞( Role: Joint author)

    (株)技術情報協会  2017.10 

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    Language:Japanese Book type:Scholarly book

    researchmap

  3. 太陽エネルギー社会を築く材料テクノロジー(Ⅱ)

    金武直幸, 他( Role: Joint author)

    コロナ社  2013.11 

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    Language:Japanese

  4. 複合材料技術総覧

    ( Role: Joint author)

    2011 

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    Language:Japanese

  5. *多孔体の精密制御と機能・物性評価

    ( Role: Joint author)

    サイエンス&テクノロジー㈱ (2008)  2008 

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    Language:Japanese

    金属間化合物多孔質体の製造プロセスの解説

MISC 20

  1. Analysis of mechanical properties in Al-Si additive manufactured alloy by in-situ XRD measurement during tensile test

    足立大樹, LIU Mulin, 小橋眞, 岩井駿介, 高田尚記

    X線材料強度に関するシンポジウム講演論文集   Vol. 57th   2023

  2. 引張試験/その場XRD測定を用いたAl-Si合金積層造形体の高強度支配因子の同定

    高田尚記, 劉牧霖, 平田雅裕, 鈴木飛鳥, 小橋眞, 加藤正樹, 足立大樹

    日本金属学会講演大会(Web)   Vol. 173rd   2023

  3. レーザ粉末床溶融結合法によるAl-Si合金のレーザ条件最適化と組織・特性制御—Optimizing Laser Conditions and Controlling Microstructure/Properties of Laser Powder Bed Fused Al-Si Alloys—特集 粉末積層3D造形に関わる材料および技術の最先端

    鈴木 飛鳥, 高田 尚記, 小橋 眞, 加藤 正樹

    粉体および粉末冶金 = Journal of the Japan Society of Powder and Powder Metallurgy : 粉体粉末冶金協会誌 / 粉体粉末冶金協会 編   Vol. 69 ( 10 ) page: 417 - 425   2022.10

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    CiNii Books

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  4. 金属積層造形のプロセスパラメータ最適化への機械学習の活用—Application of Machine Learning to Process Parameter Optimizations of Metal Additive Manufacturing—特集 モノづくりへのAI/IoT活用 : 溶射への導入に向けて

    鈴木 飛鳥, 伊部 博之, 高田 尚記, 小橋 眞, 加藤 正樹

    溶射 : 日本溶射学会誌   Vol. 59 ( 4 ) page: 210 - 216   2022.10

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    CiNii Books

    researchmap

  5. 耐用温度300°Cを実現する鋳造アルミニウム共晶合金の設計と組織形態制御—Design and controlling microstructure of cast-type aluminum eutectic alloys with an allowable service temperature of 300°C

    高田 尚記, 岡野 直輝, 相川 宗也, 岡野 大幹, 鈴木 飛鳥, 小橋 眞

    軽金属   Vol. 72 ( 6 ) page: 381 - 387   2022.6

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    Language:Japanese   Publisher:軽金属学会  

    CiNii Books

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  6. 計算状態図を基にした耐熱アルミニウム鍛造合金の設計と組織制御—Design and Microstructural Control of Heat-Resistant Aluminum Wrought Alloys Based on Calculated Phase Diagrams

    高田 尚記, 鈴木 飛鳥, 小橋 眞

    まてりあ = Materia Japan   Vol. 61 ( 4 ) page: 195 - 201   2022.4

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    Language:Japanese   Publisher:日本金属学会  

    CiNii Books

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  7. Meso-structural Control on Metal Surfaces Based on Powder Metallurgy and Its Application to Metal/Polymer Joining

    Asuka Suzuki, Naoki Takata, Makoto Kobashi

    Journal of the Society of Powder Technology, Japan   Vol. 59 ( 10 ) page: 511 - 517   2022

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    This paper introduces meso-scale structure synthesis on metal surfaces through reaction processes from raw metal powders. The mesostructures are applied to metal/polymer anchor joining. The first topic is the synthesis of Fe-based porous structure on Fe substrate through the combustion reaction of the Fe-Ti-B system. The structure could be controlled in view of the phase equilibria at the maximum temperature of the reaction. A Fe/epoxy resin joint via the porous structure exhibits high tensile strength in a direction perpendicular to the joint interface. The second topic is the fabrication of mesostructure protruded on an Al alloy surface by laser scanning on Al-Ti-C powders. The mesostructural morphology is related to the formation of TiC and Al3Ti phases, which can be understood based on the solidification sequence after the laser irradiation. An Al alloy/CFRTP joint via the mesostructure exhibits high joint strength compared with previously reported similar anchor joints.

    DOI: 10.4164/sptj.59.511

    Scopus

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  8. Advanced Powder Technology掲載論文シリーズ 粉末冶金に基づく金属表面でのメゾ構造制御とその金属/樹脂接合への応用—Research Series of Featured Papers in Advanced Powder Technology : Meso-structural Control on Metal Surfaces Based on Powder Metallurgy and Its Application to Metal/Polymer Joining

    鈴木 飛鳥, 高田 尚記, 小橋 眞

    粉体工学会誌 = Journal of the Society of Powder Technology, Japan / 粉体工学会 編   Vol. 59 ( 10 ) page: 511 - 517   2022

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    CiNii Books

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  9. 超硬合金の積層造形とプロセスインフォマティクス—Additive Manufacturing of Cemented Carbides and its Process Informatics—特集 積層造形最前線

    鈴木 飛鳥, 伊部 博之, 高田 尚記, 小橋 眞, 加藤 正樹

    ふぇらむ = Bulletin of the Iron and Steel Institute of Japan : (一社)日本鉄鋼協会会報 / 日本鉄鋼協会 編   Vol. 27 ( 12 ) page: 862 - 869   2022

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  10. ろう付用Al-Si系合金材を用いたポーラスアルミニウムの接合におけるポーラスアルミニウムの気孔構造変化と液相の挙動—Change in the Porous Structure and the Liquid Phase Migration in the Bonding Porous Aluminum Using an Al-Si Based Alloy Sheet for Brazing

    黒崎 友仁, 小橋 眞, 高田 尚記, 鈴木 飛鳥, 田中 宏樹, 箕田 正

    UACJ technical reports / UACJ技術開発研究所 編   Vol. 6 ( 1 ) page: 33 - 42   2019

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  11. Effect of Specimen Size and Shape on Strength and Deformation of High-Purity Aluminum Single-Crystal Micropillars Invited Reviewed

    Soichiro Takeyasu, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    Journal of The Japan Institue of Light Metals   Vol. 68 ( 5 ) page: 250-256   2018.5

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    DOI: 10.2464/jilm.68.250

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  12. アルミニウム合金に形成した層状複水酸化物皮膜の微細構造解析

    高田尚記, 小橋眞, 嶋田雄太, 芹澤愛, 石崎貴裕

    軽金属学会大会講演概要   Vol. 134th   2018

  13. Solid Fe/Liquid Zn Interfacial Reaction of Hot-Dip Galvanized Fe-Si Alloy Sheets Invited Reviewed

    Naoki Takata, Kunihisa Hayano, Asuka Suzuki, Makoto Kobashi

    Proceedings of GALVATEC2017 (11th International Conference on Zinc and Zinc Alloy Coated Steel Sheet)     page: 177-181   2017.11

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  14. 金属粉末レーザ積層造形法によって作製されたAL-10Si-0.4Mg合金の組織と機械的性質 Invited Reviewed

    高田尚記, 小平寛久, 関沢圭人, 鈴木飛鳥, 小橋 眞

    軽金属   Vol. 67 ( 11 ) page: 582-588   2017.11

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  15. 化学反応を利用したアルミニウム基複合材料の製造方法 Invited Reviewed

    小橋 眞, 高田尚記, 鈴木飛鳥

    軽金属   Vol. 67 ( 11 ) page: 571-575   2017.11

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  16. Induction-Activated Self-propagating, High-temperature Synthesis of Nickel Aluminide

    M. Shekari, M. Adeli, A. Khobzi, M. Kobashi, N. Kanetake

    Advanced Powder Technology   Vol. 28   page: 2974-2979   2017.9

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  17. Change in Microstructure of Selectively Laser Melted AlSi10Mg Alloy with Heat Treatments Reviewed

    N.Takata, H.Kodaira, K.Sekizawa, A.Suzuki, M.Kobashi

    Materials Science & Engineering A   Vol. 704   page: 218-228   2017.8

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  18. 燃焼合成反応を利用したFe/TiB2複合材料の合成とポーラス化 Invited Reviewed

    伊藤 峻, 髙田 尚記, 小橋 眞

    粉体および粉末冶金   Vol. 64 ( 6 ) page: 288-294   2017.6

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  19. Compressive properties of porous Ti-Al alloys fabricated by reaction Reviewed

    N. Takata, K. Uematsu, M. Kobashi

    Materials Science & Engineering A   Vol. 697   page: 66-70   2017.5

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  20. 粉末冶金法を利用したポーラス金属の製造プロセスおよび気孔構造制御 Invited Reviewed

    小橋 眞

    粉体および粉末冶金   Vol. 64 ( 2 ) page: 61-67   2017.3

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▼display all

Presentations 378

  1. マルエージング鋼積層造形体のオーステナイト逆変態挙動

    高田 尚記、伊藤 裕也、西田 亮也、鈴木 飛鳥、小橋 眞、加藤 正樹

    金属学会第168回講演大会・鉄鋼協会第181回春季講演大会  2021.3  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  2. Al-Fe二元系過共晶合金積層造形体の高温における組織変化

    王 文苑,高田尚記,鈴木飛鳥,小橋 眞,加藤正樹

    金属学会第168回講演大会・鉄鋼協会第181回春季講演大会  2021.3  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Poster presentation  

  3. レーザ粉末床溶融結合法により積層造形されたAl-2.5Fe二元合金の組織および機械的性質に及ぼす焼鈍の影響

    チーシン,高田尚記,鈴木飛鳥,小橋 眞,加藤正樹

    金属学会第168回講演大会・鉄鋼協会第181回春季講演大会  2021.3  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  4. Al-12Si合金積層造形体の過飽和固溶Si量に及ぼすレーザ条件の影響

    鈴木 飛鳥、宮坂 達也、高田 尚記、小橋 眞、加藤 正樹、若目田 寛、野本 祐春、下野 祐典

    金属学会第168回講演大会・鉄鋼協会第181回春季講演大会  2021.3  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  5. ナノ析出制御によるAl-Si合金積層造形体の強度と延性の向上

    劉 牧霖、髙田 尚記、鈴木 飛鳥、小橋 眞、加藤 正樹

    金属学会第168回講演大会・鉄鋼協会第181回春季講演大会  2021.3  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  6. Al-12Si合金積層造形体の過飽和固溶Si量に及ぼすレーザ条件の影響

    鈴木 飛鳥, 宮坂 達也, 高田 尚記, 小橋 眞, 加藤 正樹, 若目田 寛, 野本 祐春, 下野 祐典

    金属学会第168回講演大会・鉄鋼協会第181回春季講演大会  2021.3  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Language:Japanese   Presentation type:Oral presentation (general)  

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  7. Al-Fe二元系過共晶合金積層造形体の高温における組織変化

    王 文苑, 高田尚記, 鈴木飛鳥, 小橋 眞, 加藤正樹

    金属学会第168回講演大会・鉄鋼協会第181回春季講演大会  2021.3  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Language:Japanese   Presentation type:Poster presentation  

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  8. ナノ析出制御によるAl-Si合金積層造形体の強度と延性の向上

    劉 牧霖, 髙田 尚記, 鈴木 飛鳥, 小橋 眞, 加藤 正樹

    金属学会第168回講演大会・鉄鋼協会第181回春季講演大会  2021.3  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Language:Japanese   Presentation type:Oral presentation (general)  

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  9. レーザ粉末床溶融結合法により積層造形されたAl-2.5Fe二元合金の組織および機械的性質に及ぼす焼鈍の影響

    チーシン, 高田尚記, 鈴木飛鳥, 小橋 眞, 加藤正樹

    金属学会第168回講演大会・鉄鋼協会第181回春季講演大会  2021.3  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

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  10. マルエージング鋼積層造形体のオーステナイト逆変態挙動

    高田 尚記, 伊藤 裕也, 西田 亮也, 鈴木 飛鳥, 小橋 眞, 加藤 正樹

    金属学会第168回講演大会・鉄鋼協会第181回春季講演大会  2021.3  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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  11. 積層造形Al-12Si合金のレーザ照射条件と微視組織の相関解析

    宮坂達也,鈴木飛鳥,高田尚記,小橋 眞,若目田寛,野本祐春,下野祐典

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

  12. Al-Zn-Mg3元系共晶反応により形成するT-Al6Mg11Zn11相の形態と機械的性質

    高田尚記,岡野大幹,相川宗也,鈴木飛鳥,小橋眞,萩原幸司

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

  13. Microstructural Characterization of a Hypereutectic Al-Fe Binary Alloy Fabricated by Laser Powder Bed Fusion

    W. Wang,N. Takata,A. Suzuki, M. Kobashi, M. Kato

    2020.11 

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    Language:English   Presentation type:Poster presentation  

  14. アルミニウム/PCMハイブリットにおけるフィラー形状と放熱特性の関係

    谷本尚基,鈴木飛鳥,高田尚記,小橋 眞

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

  15. 燃焼合成発泡法によるL12型(Al,Fe)3Ti基複合材料の気孔構造と微視組織

    藤代暉雅,犬飼貴雅,鈴木飛鳥,高田尚記,小橋 眞,岡田裕二,古川雄一

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

  16. 付加製造アンカー構造を介したA5052/CFRTP接合体の接合温度制御による高強度化

    岩田慶一郎,金 昇光,鈴木飛鳥,高田尚記,小橋 眞

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

  17. 溶融Al-Ti合金/炭素繊維間の界面反応と濡れの速度論評価

    石黒廉吉,鈴木飛鳥,高田尚記,小橋 眞,杉浦直晋,古川雄一

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

  18. 溶融Al-Si合金/炭素繊維間の界面反応と濡れに及ぼす溶湯温度およびケイ素濃度の影響

    三輪拓海,石黒廉吉,鈴木飛鳥,高田尚記,小橋 眞,杉浦直晋,古川雄一

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

  19. Al-Zn-Mg3元系共晶反応により形成するT-Al6Mg11Zn11相の形態と機械的性質

    高田尚記, 岡野大幹, 相川宗也, 鈴木飛鳥, 小橋眞, 萩原幸司

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

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  20. Microstructural Characterization of a Hypereutectic Al-Fe Binary Alloy Fabricated by Laser Powder Bed Fusion

    W. Wang, N. Takata, A. Suzuki, M. Kobashi, M. Kato

    2020.11 

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    Event date: 2020.11

    Language:English   Presentation type:Poster presentation  

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  21. アルミニウム/PCMハイブリットにおけるフィラー形状と放熱特性の関係

    谷本尚基, 鈴木飛鳥, 高田尚記, 小橋 眞

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

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  22. 付加製造アンカー構造を介したA5052/CFRTP接合体の接合温度制御による高強度化

    岩田慶一郎, 金 昇光, 鈴木飛鳥, 高田尚記, 小橋 眞

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

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  23. 溶融Al-Si合金/炭素繊維間の界面反応と濡れに及ぼす溶湯温度およびケイ素濃度の影響

    三輪拓海, 石黒廉吉, 鈴木飛鳥, 高田尚記, 小橋 眞, 杉浦直晋, 古川雄一

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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  24. 積層造形Al-12Si合金のレーザ照射条件と微視組織の相関解析

    宮坂達也, 鈴木飛鳥, 高田尚記, 小橋 眞, 若目田寛, 野本祐春, 下野祐典

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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  25. 燃焼合成発泡法によるL12型(Al,Fe)3Ti基複合材料の気孔構造と微視組織

    藤代暉雅, 犬飼貴雅, 鈴木飛鳥, 高田尚記, 小橋 眞, 岡田裕二, 古川雄一

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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  26. 溶融Al-Ti合金/炭素繊維間の界面反応と濡れの速度論評価

    石黒廉吉, 鈴木飛鳥, 高田尚記, 小橋 眞, 杉浦直晋, 古川雄一

    軽金属学会第139回秋期講演大会  2020.11  一般社団法人軽金属学会

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  27. Al-Si共晶反応を利用して低温で誘起された Al-Ti系燃焼合成反応における反応プロセスの解明

    島田寛幸,鈴木飛鳥,高田尚記,小橋 眞

    粉体粉末冶金協会 2020年度秋季大会  2020.10  一般社団法人粉体粉末冶金協会

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    Language:Japanese   Presentation type:Oral presentation (general)  

  28. 気孔安定化粒子を添加したポーラス Al3Ti基複合材料の燃焼合成発泡挙動の透過 X線その場観察と気孔形態評価

    犬飼貴雅,鈴木飛鳥,高田尚記,小橋 眞,岡田裕二,古川雄一

    粉体粉末冶金協会 2020年度秋季大会  2020.10  一般社団法人粉体粉末冶金協会

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    Language:Japanese   Presentation type:Oral presentation (general)  

  29. CaH2による低温還元を利用したナノ Fe-Ni粉の合成

    宮本大也,松本章宏,小橋 眞

    粉体粉末冶金協会 2020年度秋季大会  2020.10  一般社団法人粉体粉末冶金協会

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    Language:Japanese   Presentation type:Oral presentation (general)  

  30. PBF積層造形の適用に向けた WC/Co焼結体へのレーザ照射による組織変化の評価

    柴 勇輔,伊部博之,鈴木飛鳥,高田尚記,小橋 眞

    粉体粉末冶金協会 2020年度秋季大会  2020.10  一般社団法人粉体粉末冶金協会

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    Event date: 2020.10

    Language:Japanese   Presentation type:Oral presentation (general)  

  31. Optimizations of process conditions for fabricating porous aluminum by pressure-less liquid phase sintering with Al-Cu eutectic alloy powder and space holder

    Samuel BUDIMAN, Asuka SUZUKI, Naoki TAKATA, Makoto KOBASHI

    2020.10 

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    Event date: 2020.10

    Language:English   Presentation type:Oral presentation (general)  

  32. Al-Si共晶反応を利用して低温で誘起された Al-Ti系燃焼合成反応における反応プロセスの解明

    島田寛幸, 鈴木飛鳥, 高田尚記, 小橋 眞

    粉体粉末冶金協会 2020年度秋季大会  2020.10  一般社団法人粉体粉末冶金協会

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    Event date: 2020.10

    Language:Japanese   Presentation type:Oral presentation (general)  

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  33. Optimizations of process conditions for fabricating porous aluminum by pressure-less liquid phase sintering with Al-Cu eutectic alloy powder and space holder

    Samuel BUDIMAN, Asuka SUZUKI, Naoki TAKATA, Makoto KOBASHI

    2020.10 

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    Event date: 2020.10

    Language:English   Presentation type:Oral presentation (general)  

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  34. CaH2による低温還元を利用したナノ Fe-Ni粉の合成

    宮本大也, 松本章宏, 小橋 眞

    粉体粉末冶金協会 2020年度秋季大会  2020.10  一般社団法人粉体粉末冶金協会

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    Event date: 2020.10

    Language:Japanese   Presentation type:Oral presentation (general)  

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  35. PBF積層造形の適用に向けた WC/Co焼結体へのレーザ照射による組織変化の評価

    柴 勇輔, 伊部博之, 鈴木飛鳥, 高田尚記, 小橋 眞

    粉体粉末冶金協会 2020年度秋季大会  2020.10  一般社団法人粉体粉末冶金協会

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    Event date: 2020.10

    Language:Japanese   Presentation type:Oral presentation (general)  

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  36. 気孔安定化粒子を添加したポーラス Al3Ti基複合材料の燃焼合成発泡挙動の透過 X線その場観察と気孔形態評価

    犬飼貴雅, 鈴木飛鳥, 高田尚記, 小橋 眞, 岡田裕二, 古川雄一

    粉体粉末冶金協会 2020年度秋季大会  2020.10  一般社団法人粉体粉末冶金協会

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    Event date: 2020.10

    Language:Japanese   Presentation type:Oral presentation (general)  

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  37. α-Al/T-Al6Mg11Zn11二相共晶合金の高温における強度と変形機構

    相川宗也,高田尚記,鈴木飛鳥,小橋 眞,西浦且章,萩原幸司

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  38. 機械学習を用いた積層造形Al-12Si合金におけるレーザ条件と相対密度の相関解析

    鈴木 飛鳥、宮坂 達也、高田 尚記、小橋 眞、加藤 正樹、若目田 寛、野本 祐春、下野 祐典

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  39. Effect of Pre-strain on Compression Response of α-(Fe, Cr) Single-Crystal Micropillars

    2020.9 

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    Event date: 2020.9

    Language:English   Presentation type:Oral presentation (general)  

  40. 溶融Zn-6Al-3Mg合金めっき皮膜の熱処理に伴う組織変化と加工性評価

    深田剛志,横井宏紀,高田尚記,鈴木飛鳥,小橋 眞

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Poster presentation  

  41. レーザ積層造形により作製したマルエージング鋼の組織と機械的特性に及ぼす熱処理の影響

    伊藤裕也,西田亮也,高田尚記,鈴木飛鳥,小橋 眞,加藤正樹

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  42. Al-Mg-Zn 3元系合金のT-Al6Mg11Zn11相の析出に及ぼす第4元素添加の影響

    石井大貴,高木力斗,高田尚記,鈴木飛鳥,小橋 眞

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Poster presentation  

  43. レーザ粉末床融法により作製されたAl-15Fe合金の微視組織

    王 文苑,高田尚記,鈴木飛鳥,小橋 眞,加藤正樹

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  44. Al-Si-Cu鋳造合金の400℃以上の高温における時効析出

    黎 若琪,高田尚記,鈴木飛鳥,小橋 眞,岡田裕二,古川雄一

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  45. 単結晶アルミニウムマイクロピラーの強度に及ぼす固溶Mg元素の影響

    上杉真太郎,竹安崇一郎,高田尚記,鈴木飛鳥,小橋 眞

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  46. Al-Mg-Zn 3元系合金のT-Al6Mg11Zn11相の析出に及ぼす第4元素添加の影響

    石井大貴, 高木力斗, 高田尚記, 鈴木飛鳥, 小橋 眞

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Poster presentation  

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  47. Effect of Pre-strain on Compression Response of α-(Fe, Cr) Single-Crystal Micropillars

    2020.9 

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    Event date: 2020.9

    Language:English   Presentation type:Oral presentation (general)  

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  48. Al-Si-Cu鋳造合金の400℃以上の高温における時効析出

    黎 若琪, 高田尚記, 鈴木飛鳥, 小橋 眞, 岡田裕二, 古川雄一

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  49. α-Al/T-Al6Mg11Zn11二相共晶合金の高温における強度と変形機構

    相川宗也, 高田尚記, 鈴木飛鳥, 小橋 眞, 西浦且章, 萩原幸司

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  50. レーザ粉末床融法により作製されたAl-15Fe合金の微視組織

    王 文苑, 高田尚記, 鈴木飛鳥, 小橋 眞, 加藤正樹

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  51. レーザ積層造形により作製したマルエージング鋼の組織と機械的特性に及ぼす熱処理の影響

    伊藤裕也, 西田亮也, 高田尚記, 鈴木飛鳥, 小橋 眞, 加藤正樹

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  52. 単結晶アルミニウムマイクロピラーの強度に及ぼす固溶Mg元素の影響

    上杉真太郎, 竹安崇一郎, 高田尚記, 鈴木飛鳥, 小橋 眞

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  53. 溶融Zn-6Al-3Mg合金めっき皮膜の熱処理に伴う組織変化と加工性評価

    深田剛志, 横井宏紀, 高田尚記, 鈴木飛鳥, 小橋 眞

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Poster presentation  

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  54. 機械学習を用いた積層造形Al-12Si合金におけるレーザ条件と相対密度の相関解析

    鈴木 飛鳥, 宮坂 達也, 高田 尚記, 小橋 眞, 加藤 正樹, 若目田 寛, 野本 祐春, 下野 祐典

    金属学会第167回講演大会・鉄鋼協会第180回秋季講演大会  2020.9  公益財団法人日本金属学会/一般社団法人日本鉄鋼協会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  55. ポーラス金属のメゾスケール形態制御による多機能化

    小橋 眞

    軽金属学会春期講演大会  2020.5.23  軽金属学会

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    Event date: 2020.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:香川大学   Country:Japan  

  56. 燃焼合成法によるAl3Ti基ポーラス複合材料の発泡挙動その場観察と気孔形態評価

    犬飼貴雅,鈴木飛鳥,高田尚記,小橋 眞,岡田裕二,古川雄一

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  57. レーザ積層造形により作製されたAl-Si合金造形体の過飽和固溶体による特異な強化

    高田尚記,小平寛久,劉 牧霖,鈴木飛鳥,小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  58. レーザー積層造形法により作製したアルミニウム合金ラティス構造体の圧縮変形挙動解析

    鈴木飛鳥,和田崇郁,高田尚記,小橋 眞,加藤正樹

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  59. アルミニウム溶湯/炭素繊維間の界面現象に及ぼす溶湯へのケイ素添加の影響

    三輪拓海,石黒廉吉,鈴木飛鳥,高田尚記,小橋 眞,杉浦直晋,古川雄一

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  60. その場反応付加製造によるアンカー構造を介したA5052/CFRTP接合体の強度に及ぼす接合条件の影響

    岩田慶一郎,金 昇光,鈴木飛鳥,高田尚記,小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  61. L12型結晶構造をもつ新規(Al, Fe)3Ti金属間化合物基ポーラス複合材料の燃焼合成発泡

    藤代暉雅,犬飼貴雅,鈴木飛鳥,高田尚記,小橋 眞,岡田裕二,古川雄一

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  62. Al-Mg-Zn3元系耐熱合金の析出に及ぼす第4添加元素の影響

    石井大貴,高木力斗,高田尚記,鈴木飛鳥,小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  63. レーザ積層造形法により作製したAl-15%Fe合金造形体の特性に及ぼすプロセス条件の影響

    王 文苑,高田尚記,鈴木飛鳥,小橋 眞,加藤正樹

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  64. アルミニウム鋳造合金AC2Bの400℃以上の高温における時効硬化

    黎 若琪,高田尚記,鈴木飛鳥,小橋 眞,岡田裕二,古川雄一

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  65. 異なる3種のユニットセルからなる積層造形Al-Si合金ラティス構造体の圧縮特性

    劉 肖揚,鈴木飛鳥,高田尚記,小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  66. 機械学習を用いたアルミニウム合金のレーザ積層造形パラメータ最適化に関する検討

    宮坂達也,鈴木飛鳥,高田尚記,小橋 眞,若目田寛,野本祐春,下野祐

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  67. その場反応型付加製造によるアルミニウム/樹脂接合用Al-TiC系アンカー層構造に及ぼす炭素量の影響

    金 昇光,鈴木飛鳥,高田尚記,小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  68. アルミニウム溶湯/炭素繊維間の界面現象に及ぼす溶湯へのチタン添加の影響

    石黒廉吉,鈴木飛鳥,高田尚記,小橋 眞,杉浦直晋,古川雄一

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  69. ボクセルFEMを用いたAl/PCMハイブリットにおけるアルミニウムフィラーの好適形状の検討

    谷本尚基,鈴木飛鳥,小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

  70. Al-Mg-Zn3元系耐熱合金の析出に及ぼす第4添加元素の影響

    石井大貴, 高木力斗, 高田尚記, 鈴木飛鳥, 小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

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  71. L12型結晶構造をもつ新規(Al, Fe)3Ti金属間化合物基ポーラス複合材料の燃焼合成発泡

    藤代暉雅, 犬飼貴雅, 鈴木飛鳥, 高田尚記, 小橋 眞, 岡田裕二, 古川雄一

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

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  72. その場反応付加製造によるアンカー構造を介したA5052/CFRTP接合体の強度に及ぼす接合条件の影響

    岩田慶一郎, 金 昇光, 鈴木飛鳥, 高田尚記, 小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

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  73. レーザ積層造形法により作製したAl-15%Fe合金造形体の特性に及ぼすプロセス条件の影響

    王 文苑, 高田尚記, 鈴木飛鳥, 小橋 眞, 加藤正樹

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

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  74. レーザ積層造形により作製されたAl-Si合金造形体の過飽和固溶体による特異な強化

    高田尚記, 小平寛久, 劉 牧霖, 鈴木飛鳥, 小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

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  75. レーザー積層造形法により作製したアルミニウム合金ラティス構造体の圧縮変形挙動解析

    鈴木飛鳥, 和田崇郁, 高田尚記, 小橋 眞, 加藤正樹

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Event date: 2020.5

    Language:Japanese  

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  76. ポーラス金属のメゾスケール形態制御による多機能化

    小橋 眞

    軽金属学会春期講演大会  2020.5.23  軽金属学会

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    Event date: 2020.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:香川大学   Country:Japan  

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  77. ボクセルFEMを用いたAl/PCMハイブリットにおけるアルミニウムフィラーの好適形状の検討

    谷本尚基, 鈴木飛鳥, 小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Language:Japanese  

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  78. アルミニウム鋳造合金AC2Bの400℃以上の高温における時効硬化

    黎 若琪, 高田尚記, 鈴木飛鳥, 小橋 眞, 岡田裕二, 古川雄一

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Language:Japanese  

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  79. アルミニウム溶湯/炭素繊維間の界面現象に及ぼす溶湯へのチタン添加の影響

    石黒廉吉, 鈴木飛鳥, 高田尚記, 小橋 眞, 杉浦直晋, 古川雄一

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Language:Japanese  

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  80. アルミニウム溶湯/炭素繊維間の界面現象に及ぼす溶湯へのケイ素添加の影響

    三輪拓海, 石黒廉吉, 鈴木飛鳥, 高田尚記, 小橋 眞, 杉浦直晋, 古川雄一

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Language:Japanese  

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  81. その場反応型付加製造によるアルミニウム/樹脂接合用Al-TiC系アンカー層構造に及ぼす炭素量の影響

    金 昇光, 鈴木飛鳥, 高田尚記, 小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Language:Japanese  

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  82. 機械学習を用いたアルミニウム合金のレーザ積層造形パラメータ最適化に関する検討

    宮坂達也, 鈴木飛鳥, 高田尚記, 小橋 眞, 若目田寛, 野本祐春, 下野祐

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Language:Japanese  

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  83. 異なる3種のユニットセルからなる積層造形Al-Si合金ラティス構造体の圧縮特性

    劉 肖揚, 鈴木飛鳥, 高田尚記, 小橋 眞

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Language:Japanese  

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  84. 燃焼合成法によるAl3Ti基ポーラス複合材料の発泡挙動その場観察と気孔形態評価

    犬飼貴雅, 鈴木飛鳥, 高田尚記, 小橋 眞, 岡田裕二, 古川雄一

    軽金属学会春期講演大会  2020.5  一般社団法人軽金属学会

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    Language:Japanese  

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  85. レーザ積層造形により作製されたAl-Si系合金造形体の強化機構

    高田 尚記、小平 寛久、劉 牧霖、鈴木 飛鳥、小橋 眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2020.3  公益社団法人日本金属学会

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    Event date: 2020.3

    Language:Japanese  

  86. レーザ積層造形法によって作製されたマルエージング鋼造形体のオーステナイト逆変態挙動

    伊藤裕也、西田亮也、高田 尚記、鈴木 飛鳥、小橋 眞、加藤 正樹

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2020.3  公益社団法人日本金属学会

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    Event date: 2020.3

    Language:Japanese  

  87. その場反応型付加製造による鉄/樹脂接合用アンカー層構造に及ぼす粉末組成の影響

    鈴木 飛鳥、植田 裕斗、高田 尚記、小橋 眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2020.3  公益社団法人日本金属学会

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    Event date: 2020.3

    Language:Japanese  

  88. その場反応型付加製造による鉄/樹脂接合用アンカー層構造に及ぼす粉末組成の影響

    鈴木 飛鳥, 植田 裕斗, 高田 尚記, 小橋 眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2020.3  公益社団法人日本金属学会

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    Language:Japanese  

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  89. レーザ積層造形法によって作製されたマルエージング鋼造形体のオーステナイト逆変態挙動

    伊藤裕也, 西田亮也, 高田 尚記, 鈴木 飛鳥, 小橋 眞, 加藤 正樹

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2020.3  公益社団法人日本金属学会

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    Language:Japanese  

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  90. レーザ積層造形により作製されたAl-Si系合金造形体の強化機構

    高田 尚記, 小平 寛久, 劉 牧霖, 鈴木 飛鳥, 小橋 眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2020.3  公益社団法人日本金属学会

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    Language:Japanese  

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  91. Effect of Joining Temperature History on Lap Shear Strength of Directly Joined A5052/Polyamide-6 via Porous Layer International conference

    eung-Gwang Kim, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    INALCO2019  2019.11 

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    Event date: 2019.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  92. Adhesion Properties of Hydroxide Films Formed on the 6061 Aluminum Alloy Prepared by Steam Coating International conference

    Hongmei Li, Naoki Takata, Makoto Kobashi, Ai Serizawa

    INALCO2019  2019.11 

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    Event date: 2019.11

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  93. Adhesion Properties of Hydroxide Films Formed on the 6061 Aluminum Alloy Prepared by Steam Coating International conference

    Hongmei Li, Naoki Takata, Makoto Kobashi, Ai Serizawa

    INALCO2019  2019.11 

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    Event date: 2019.11

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

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  94. Effect of Joining Temperature History on Lap Shear Strength of Directly Joined A5052/Polyamide-6 via Porous Layer International conference

    eung-Gwang Kim, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    INALCO2019  2019.11 

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    Event date: 2019.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

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  95. マイクロピラー圧縮試験で測定される工業用純アルミニウム単結晶の強度の特異性

    高田 尚記、竹安 崇一郎、李 鴻美、鈴木 飛鳥、小橋 眞

    軽金属学会第137回秋期講演大会  2019.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京農工大学   Country:Japan  

  96. 新規耐熱Al-5Mg-3.5Zn合金の高温引張特性

    中塚 怜志、髙田 尚記、鈴木 飛鳥、小橋 眞

    軽金属学会第137回秋期講演大会  2019.11  一般社団法人軽金属学会

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    Event date: 2019.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京農工大学   Country:Japan  

  97. マイクロピラー圧縮試験で測定される工業用純アルミニウム単結晶の強度の特異性

    高田 尚記, 竹安 崇一郎, 李 鴻美, 鈴木 飛鳥, 小橋 眞

    軽金属学会第137回秋期講演大会  2019.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京農工大学   Country:Japan  

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  98. 新規耐熱Al-5Mg-3.5Zn合金の高温引張特性

    中塚 怜志, 髙田 尚記, 鈴木 飛鳥, 小橋 眞

    軽金属学会第137回秋期講演大会  2019.11  一般社団法人軽金属学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京農工大学   Country:Japan  

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  99. SLM法により造形したBCC型ラティス構造体の圧縮変形挙動に及ぼすストラット形状の影響

    和田 崇郁、鈴木 飛鳥、高田 尚記、小橋 眞

    粉体粉末冶金協会第124回講演大会  2019.10  一般社団法人粉体粉末冶金協会

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    Event date: 2019.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  100. Al-Cu合金粉末を用いた液相焼結によるポーラスAl製造プロセスの検討

    鈴木 飛鳥、高田 尚記、小橋 眞

    粉体粉末冶金協会第124回講演大会  2019.10  一般社団法人粉体粉末冶金協会

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    Event date: 2019.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  101. レーザ誘起燃焼合成によるFe/樹脂接合用アンカーの構造に及ぼす粉末組成の影響調査

    植田 裕斗、鈴木 飛鳥、髙田 尚記、小橋 眞

    粉体粉末冶金協会第124回講演大会  2019.10  一般社団法人粉体粉末冶金協会

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  102. 選択的レーザ溶融法によるAl‐2.5Fe二元合金の作製

    Xing Qi、高田 尚記、鈴木 飛鳥、小橋 眞、加藤 正樹

    粉体粉末冶金協会第124回講演大会  2019.10  一般社団法人粉体粉末冶金協会

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    Event date: 2019.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  103. Al-Cu合金粉末を用いた液相焼結によるポーラスAl製造プロセスの検討

    鈴木 飛鳥, 高田 尚記, 小橋 眞

    粉体粉末冶金協会第124回講演大会  2019.10  一般社団法人粉体粉末冶金協会

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

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  104. SLM法により造形したBCC型ラティス構造体の圧縮変形挙動に及ぼすストラット形状の影響

    和田 崇郁, 鈴木 飛鳥, 高田 尚記, 小橋 眞

    粉体粉末冶金協会第124回講演大会  2019.10  一般社団法人粉体粉末冶金協会

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    Event date: 2019.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

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  105. レーザ誘起燃焼合成によるFe/樹脂接合用アンカーの構造に及ぼす粉末組成の影響調査

    植田 裕斗, 鈴木 飛鳥, 髙田 尚記, 小橋 眞

    粉体粉末冶金協会第124回講演大会  2019.10  一般社団法人粉体粉末冶金協会

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

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  106. 選択的レーザ溶融法によるAl‐2.5Fe二元合金の作製

    Xing Qi, 高田 尚記, 鈴木 飛鳥, 小橋 眞, 加藤 正樹

    粉体粉末冶金協会第124回講演大会  2019.10  一般社団法人粉体粉末冶金協会

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    Event date: 2019.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

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  107. Effect of sample dimensions on microstructure of selectively laser melted AlSi10Mg alloy International conference

    Naoki Takata, Hirohisa Kodaira, Asuka Suzuki Makoto Kobashi

    MS&T19  2019.9 

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    Event date: 2019.9 - 2019.10

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Portland, USA   Country:United States  

  108. Optimizing Laser Parameters for Selectively Laser Melted Maraging Steel Using Deposited Energy Density International conference

    Ryoya Nishida, Asuka Suzuki, Naoki Takata, Makoto Kobashi, Masaki Kato

    MS&T19  2019.9 

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    Event date: 2019.9 - 2019.10

    Language:English   Presentation type:Poster presentation  

    Venue:Portland, USA   Country:United States  

  109. Effect of Heat Treatments on Compressive Properties of Lattice-structured AlSi10Mg Alloy Fabricated by Selective Laser Melting International conference

    Asuka Suzuki, Keito Sekizawa, Mulin Liu, Takafumi Wada, Naoki Takata, Makoto Kobashi

    MS&T19  2019.9 

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    Event date: 2019.9 - 2019.10

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Portland, USA   Country:United States  

  110. Effect of Heat Treatments on Compressive Properties of Lattice-structured AlSi10Mg Alloy Fabricated by Selective Laser Melting International conference

    Asuka Suzuki, Keito Sekizawa, Mulin Liu, Takafumi Wada, Naoki Takata, Makoto Kobashi

    MS&T19  2019.9 

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    Event date: 2019.9 - 2019.10

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Portland, USA   Country:United States  

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  111. Optimizing Laser Parameters for Selectively Laser Melted Maraging Steel Using Deposited Energy Density International conference

    Ryoya Nishida, Asuka Suzuki, Naoki Takata, Makoto Kobashi, Masaki Kato

    MS&T19  2019.9 

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    Event date: 2019.9 - 2019.10

    Language:English   Presentation type:Poster presentation  

    Venue:Portland, USA   Country:United States  

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  112. Effect of sample dimensions on microstructure of selectively laser melted AlSi10Mg alloy International conference

    Naoki Takata, Hirohisa Kodaira, Asuka Suzuki, Makoto Kobashi

    MS&T19  2019.9 

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    Event date: 2019.9 - 2019.10

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Portland, USA   Country:United States  

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  113. Al/PA6接合用の多孔質層の構造に及ぼすレーザープロセス条件の影響

    金 昇光、加藤 留意、鈴木 飛鳥、髙田 尚記、小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.12  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

  114. 溶融Zn-Al-Mg合金めっき鋼鈑の皮膜破壊過程のSEM内曲げ試験/その場観察

    横井宏紀,髙田尚記,鈴木飛鳥,小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

  115. レーザ積層造形法により作製されたAlSi10Mg合金ラティス構造体の微視組織に及ぼす熱処理の影響

    劉 牧霖、鈴木 飛鳥、高田 尚記、小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.13  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

  116. SLM造形Al合金ラティス構造体の圧縮変形におけるFEM解析とX線CT観察

    鈴木 飛鳥、和田 崇郁、高田 尚記、小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.13  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

  117. Effect of Stabilizing Niobium Element on Compression Response of α-(Fe,Cr) Single-Crystal Micropillars

    2019.9.13 

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Country:Japan  

  118. Strain Rate Sensitivity of Flow Stress of α-(Fe,Cr) Single-crystal Micropillars

    2019.9.13 

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Country:Japan  

  119. α-Al/T-Al6Mg11Zn11二相共晶合金の高温における強度と組織変化

    相川 宗也、岡野 大幹、髙田 尚記、鈴木 飛鳥、小橋 眞、西浦 且章、萩原 幸司

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.12  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

  120. Al-Mg-Zn3元系合金のT-Al6Mg11Zn11相の析出形態と時効硬化挙動

    高木 力斗、髙田 尚記、鈴木 飛鳥、小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.12  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

  121. 純アルミニウム単結晶マイクロピラーの強度のサイズ依存性に及ぼす転位下部組織の影響

    上杉 真太郎、竹安 崇一郎、髙田 尚記、鈴木 飛鳥、小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.12  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

  122. 工業用純アルミニウム単結晶マイクロピラーの特異な強度のサイズ依存性

    高田 尚記、竹安 崇一郎、李 鴻美、鈴木 飛鳥、小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.12  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

  123. ompression response of Cr-based Laves phase single-crystal micropillars

    Xue Yunlong, Li Hongmei, Takata Naoki, Kobashi Makoto

    2019.9.12 

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Country:Japan  

  124. Al-Mg-Zn3元系合金のT-Al6Mg11Zn11相の析出形態と時効硬化挙動

    高木 力斗, 髙田 尚記, 鈴木 飛鳥, 小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.12  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

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  125. ompression response of Cr-based Laves phase single-crystal micropillars

    Xue Yunlong, Li Hongmei, Takata Naoki, Kobashi Makoto

    2019.9.12 

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Country:Japan  

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  126. Effect of Stabilizing Niobium Element on Compression Response of α-(Fe,Cr) Single-Crystal Micropillars

    2019.9.13 

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Country:Japan  

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  127. Al/PA6接合用の多孔質層の構造に及ぼすレーザープロセス条件の影響

    金 昇光, 加藤 留意, 鈴木 飛鳥, 髙田 尚記, 小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.12  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

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  128. SLM造形Al合金ラティス構造体の圧縮変形におけるFEM解析とX線CT観察

    鈴木 飛鳥, 和田 崇郁, 高田 尚記, 小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.13  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

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  129. レーザ積層造形法により作製されたAlSi10Mg合金ラティス構造体の微視組織に及ぼす熱処理の影響

    劉 牧霖, 鈴木 飛鳥, 高田 尚記, 小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.13  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

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  130. α-Al/T-Al6Mg11Zn11二相共晶合金の高温における強度と組織変化

    相川 宗也, 岡野 大幹, 髙田 尚記, 鈴木 飛鳥, 小橋 眞, 西浦 且章, 萩原 幸司

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.12  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

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  131. Strain Rate Sensitivity of Flow Stress of α-(Fe,Cr) Single-crystal Micropillars

    2019.9.13 

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Country:Japan  

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  132. 工業用純アルミニウム単結晶マイクロピラーの特異な強度のサイズ依存性

    高田 尚記, 竹安 崇一郎, 李 鴻美, 鈴木 飛鳥, 小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.12  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

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  133. 純アルミニウム単結晶マイクロピラーの強度のサイズ依存性に及ぼす転位下部組織の影響

    上杉 真太郎, 竹安 崇一郎, 髙田 尚記, 鈴木 飛鳥, 小橋 眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9.12  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

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  134. 溶融Zn-Al-Mg合金めっき鋼鈑の皮膜破壊過程のSEM内曲げ試験/その場観察

    横井宏紀, 髙田尚記, 鈴木飛鳥, 小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2019.9  公益社団法人日本金属学会

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

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  135. Design of novel aluminum alloys strengthened by T-Al6Mg11Zn11 phase for high temperature applications International conference

    Naoki Takata, Masatoshi Ishihara, Satoshi Nakatsuka, Asuka Suzuki, Makoto Kobashi

    EUROMAT 2019  2019.9.2 

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:Stockholm, Sweden   Country:Sweden  

  136. Precipitation morphology of T-Al6Mg11Zn11 phase in α-Al Matrix of Al-Mg-Zn ternary alloys International conference

    Rikito Takagi, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    EUROMAT 2019  2019.9.4 

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    Event date: 2019.9

    Presentation type:Poster presentation  

    Venue:Stockholm, Sweden   Country:Sweden  

  137. Development of Fe-Al intermetallic phases in hot-dip Zn–6Al–3Mg alloy coating on steel sheets International conference

    Hiroki Yokoi, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    EUROMAT 2019  2019.9.4 

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    Event date: 2019.9

    Presentation type:Poster presentation  

    Venue:Stockholm, Sweden   Country:Sweden  

  138. Design of novel aluminum alloys strengthened by T-Al6Mg11Zn11 phase for high temperature applications International conference

    Naoki Takata, Masatoshi Ishihara, Satoshi Nakatsuka, Asuka Suzuki, Makoto Kobashi

    EUROMAT 2019  2019.9.2 

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    Event date: 2019.9

    Presentation type:Oral presentation (general)  

    Venue:Stockholm, Sweden   Country:Sweden  

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  139. Development of Fe-Al intermetallic phases in hot-dip Zn–6Al–3Mg alloy coating on steel sheets International conference

    Hiroki Yokoi, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    EUROMAT 2019  2019.9.4 

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    Event date: 2019.9

    Presentation type:Poster presentation  

    Venue:Stockholm, Sweden   Country:Sweden  

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  140. Precipitation morphology of T-Al6Mg11Zn11 phase in α-Al Matrix of Al-Mg-Zn ternary alloys International conference

    Rikito Takagi, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    EUROMAT 2019  2019.9.4 

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    Event date: 2019.9

    Presentation type:Poster presentation  

    Venue:Stockholm, Sweden   Country:Sweden  

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  141. Structural Control of Fe-based Porous Layer Fabricated through Combustion Synthesis for Joining with Resin Parts International conference

    Asuka Suzuki, Kazuki Noritake, Naoki Takata, Makoto Kobashi

    11th International Conference on Porous Metals and Metallic Foams : MetFoam 2019  2019.8.21 

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    Event date: 2019.8

    Presentation type:Oral presentation (general)  

    Venue:Dearborn, USA   Country:United States  

  142. Fabrication of Porous Layer on Fe Substrate through Laser-induced Combustion Synthesis International conference

    Yuto Ueda, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    11th International Conference on Porous Metals and Metallic Foams : MetFoam 2019  2019.8.21 

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    Event date: 2019.8

    Presentation type:Poster presentation  

    Venue:Dearborn, USA   Country:United States  

  143. Change in Compressive Properties of Lattice-structured Al-Si Alloy Fabricated by Selective Laser Melting under Various Heat Treatment Conditions International conference

    Takafumi Wada, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    11th International Conference on Porous Metals and Metallic Foams : MetFoam 2019  2019.8.21 

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    Event date: 2019.8

    Presentation type:Poster presentation  

    Venue:Dearborn, USA   Country:United States  

  144. Deformation of Porous Structure during Bonding Porous Aluminum with an Al–Si-based Alloy Brazing Sheet International conference

    Tomohito Kurosaki, Makoto Kobashi, Naoki Takata, Asuka Suzuki, Hiroki Tanaka, Tadashi Minoda

    11th International Conference on Porous Metals and Metallic Foams : MetFoam 2019  2019.8.21 

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    Event date: 2019.8

    Presentation type:Oral presentation (general)  

    Venue:Dearborn, USA   Country:United States  

  145. Change in Compressive Properties of Lattice-structured Al-Si Alloy Fabricated by Selective Laser Melting under Various Heat Treatment Conditions International conference

    Takafumi Wada, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    11th International Conference on Porous Metals and Metallic Foams : MetFoam 2019  2019.8.21 

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    Event date: 2019.8

    Presentation type:Poster presentation  

    Venue:Dearborn, USA   Country:United States  

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  146. Fabrication of Porous Layer on Fe Substrate through Laser-induced Combustion Synthesis International conference

    Yuto Ueda, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    11th International Conference on Porous Metals and Metallic Foams : MetFoam 2019  2019.8.21 

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    Event date: 2019.8

    Presentation type:Poster presentation  

    Venue:Dearborn, USA   Country:United States  

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  147. Deformation of Porous Structure during Bonding Porous Aluminum with an Al–Si-based Alloy Brazing Sheet International conference

    Tomohito Kurosaki, Makoto Kobashi, Naoki Takata, Asuka Suzuki, Hiroki Tanaka, Tadashi Minoda

    11th International Conference on Porous Metals and Metallic Foams : MetFoam 2019  2019.8.21 

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    Event date: 2019.8

    Presentation type:Oral presentation (general)  

    Venue:Dearborn, USA   Country:United States  

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  148. Structural Control of Fe-based Porous Layer Fabricated through Combustion Synthesis for Joining with Resin Parts International conference

    Asuka Suzuki, Kazuki Noritake, Naoki Takata, Makoto Kobashi

    11th International Conference on Porous Metals and Metallic Foams : MetFoam 2019  2019.8.21 

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    Event date: 2019.8

    Presentation type:Oral presentation (general)  

    Venue:Dearborn, USA   Country:United States  

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  149. 金属粉末レーザ積層造形技術が生み出すアルミニウム合金の特異な組織と高強度化

    高田尚記,劉 牧霖,小平 寛久,関沢 圭人,鈴木飛鳥,小橋眞

    粉体粉末冶金協会第123回講演大会  2019.6.5 

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    Event date: 2019.6

    Presentation type:Oral presentation (invited, special)  

    Venue:東京工業大学   Country:Japan  

  150. 燃焼合成法によるAl-Tiフォーム発泡過程の透過X線その場観察

    犬飼 貴雅,鈴木 飛鳥,髙田 尚記,小橋 眞,岡田 裕二,古川 雄一

    粉体粉末冶金協会第123回講演大会  2019.6.5 

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    Event date: 2019.6

    Presentation type:Oral presentation (general)  

    Venue:東京工業大学   Country:Japan  

  151. SLM造形Al合金の三次元組織観察とvoxel FEMによるイメージベース熱伝導解析

    宮坂 達也,鈴木 飛鳥,高田 尚記,小橋 眞

    粉体粉末冶金協会第123回講演大会  2019.6.5 

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    Event date: 2019.6

    Presentation type:Oral presentation (general)  

    Venue:東京工業大学   Country:Japan  

  152. SLM造形Al合金の三次元組織観察とvoxel FEMによるイメージベース熱伝導解析

    宮坂 達也, 鈴木 飛鳥, 高田 尚記, 小橋 眞

    粉体粉末冶金協会第123回講演大会  2019.6.5 

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    Event date: 2019.6

    Presentation type:Oral presentation (general)  

    Venue:東京工業大学   Country:Japan  

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  153. 燃焼合成法によるAl-Tiフォーム発泡過程の透過X線その場観察

    犬飼 貴雅, 鈴木 飛鳥, 髙田 尚記, 小橋 眞, 岡田 裕二, 古川 雄一

    粉体粉末冶金協会第123回講演大会  2019.6.5 

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    Event date: 2019.6

    Presentation type:Oral presentation (general)  

    Venue:東京工業大学   Country:Japan  

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  154. 金属粉末レーザ積層造形技術が生み出すアルミニウム合金の特異な組織と高強度化

    高田尚記, 劉 牧霖, 小平 寛久, 関沢 圭人, 鈴木飛鳥, 小橋眞

    粉体粉末冶金協会第123回講演大会  2019.6.5 

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    Event date: 2019.6

    Presentation type:Oral presentation (invited, special)  

    Venue:東京工業大学   Country:Japan  

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  155. 計算状態図を基に設計した新規耐熱アルミニウム合金の組織と高温強度

    高田尚記,石原雅人,中塚怜志,鈴木飛鳥,小橋眞

    軽金属学会第135回春期講演大会  2019.5 

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    Event date: 2019.5

    Presentation type:Oral presentation (general)  

    Venue:富山国際会議場   Country:Japan  

  156. 高純度アルミニウム単結晶マイクロピラーの強度のサイズ依存性に及ぼす冷間圧延の影響

    上杉真太郎,高田尚記,鈴木飛鳥,小橋眞

    軽金属学会第135回春期講演大会  2019.5 

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    Event date: 2019.5

    Presentation type:Oral presentation (general)  

    Venue:富山国際会議場   Country:Japan  

  157. α-Al/T-Al6Mg11Zn11二相共晶合金の高温強度

    相川宗也,高田尚記,鈴木飛鳥,小橋眞

    軽金属学会第135回春期講演大会  2019.5 

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    Event date: 2019.5

    Presentation type:Oral presentation (general)  

    Venue:富山国際会議場   Country:Japan  

  158. ろう付用Al-Si合金材によるポーラスアルミニウムの接合におけるポーラスアルミニウムの気孔構造変化と液相の挙動

    黒崎友仁,箕田正,小橋眞,高田尚記,鈴木飛鳥

    軽金属学会第135回春期講演大会  2019.5 

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    Event date: 2019.5

    Presentation type:Oral presentation (general)  

    Venue:富山国際会議場   Country:Japan  

  159. α-Al/T-Al6Mg11Zn11二相共晶合金の高温強度

    相川宗也, 高田尚記, 鈴木飛鳥, 小橋眞

    軽金属学会第135回春期講演大会  2019.5 

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    Event date: 2019.5

    Presentation type:Oral presentation (general)  

    Venue:富山国際会議場   Country:Japan  

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  160. ろう付用Al-Si合金材によるポーラスアルミニウムの接合におけるポーラスアルミニウムの気孔構造変化と液相の挙動

    黒崎友仁, 箕田正, 小橋眞, 高田尚記, 鈴木飛鳥

    軽金属学会第135回春期講演大会  2019.5 

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    Event date: 2019.5

    Presentation type:Oral presentation (general)  

    Venue:富山国際会議場   Country:Japan  

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  161. 計算状態図を基に設計した新規耐熱アルミニウム合金の組織と高温強度

    高田尚記, 石原雅人, 中塚怜志, 鈴木飛鳥, 小橋眞

    軽金属学会第135回春期講演大会  2019.5 

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    Event date: 2019.5

    Presentation type:Oral presentation (general)  

    Venue:富山国際会議場   Country:Japan  

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  162. 高純度アルミニウム単結晶マイクロピラーの強度のサイズ依存性に及ぼす冷間圧延の影響

    上杉真太郎, 高田尚記, 鈴木飛鳥, 小橋眞

    軽金属学会第135回春期講演大会  2019.5 

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    Event date: 2019.5

    Presentation type:Oral presentation (general)  

    Venue:富山国際会議場   Country:Japan  

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  163. T-Al6Mg11Zn11金属間化合物相により強化された新規耐熱アルミニウム合金の組織と高温強度

    高田尚記,石原雅人,中塚怜志,鈴木飛鳥,小橋眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2019.3  公益社団法人日本金属学会

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    Event date: 2019.3

    Presentation type:Oral presentation (general)  

    Venue:東京電機大学   Country:Japan  

  164. Compression Response of α-(Fe,Cr) Single-Crystal Micropillars Prepared on 18Cr Ferritic Stainless Steels

    2019.3 

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    Event date: 2019.3

    Presentation type:Poster presentation  

    Country:Japan  

  165. 溶融Zn-Al-Mg 合金めっき鋼鈑におけるFe-Al 金属間化合物相の異常成長

    横井 宏紀,高田尚記,鈴木飛鳥,小橋眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2019.3  公益社団法人日本金属学会

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    Event date: 2019.3

    Presentation type:Poster presentation  

    Venue:東京電機大学   Country:Japan  

  166. 燃焼反応によるFe系多孔質層を介したFe/樹脂接合体の相互浸透層構造と接合強度の関係

    鈴木飛鳥,則竹一樹 ,高田尚記,小橋眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2019.3  公益社団法人日本金属学会

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    Event date: 2019.3

    Presentation type:Oral presentation (general)  

    Venue:東京電機大学   Country:Japan  

  167. Compression Response of α-(Fe,Cr) Single-Crystal Micropillars Prepared on 18Cr Ferritic Stainless Steels

    2019.3 

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    Event date: 2019.3

    Presentation type:Poster presentation  

    Country:Japan  

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  168. T-Al6Mg11Zn11金属間化合物相により強化された新規耐熱アルミニウム合金の組織と高温強度

    高田尚記, 石原雅人, 中塚怜志, 鈴木飛鳥, 小橋眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2019.3  公益社団法人日本金属学会

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    Event date: 2019.3

    Presentation type:Oral presentation (general)  

    Venue:東京電機大学   Country:Japan  

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  169. 溶融Zn-Al-Mg 合金めっき鋼鈑におけるFe-Al 金属間化合物相の異常成長

    横井 宏紀, 高田尚記, 鈴木飛鳥, 小橋眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2019.3  公益社団法人日本金属学会

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    Event date: 2019.3

    Presentation type:Poster presentation  

    Venue:東京電機大学   Country:Japan  

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  170. 燃焼反応によるFe系多孔質層を介したFe/樹脂接合体の相互浸透層構造と接合強度の関係

    鈴木飛鳥, 則竹一樹, 高田尚記, 小橋眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2019.3  公益社団法人日本金属学会

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    Event date: 2019.3

    Presentation type:Oral presentation (general)  

    Venue:東京電機大学   Country:Japan  

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  171. Microstructure and Strength of Heat-Resistant Aluminum Alloy Strengthened by T-Al6Mg11Zn11 Intermetallic Phase International conference

    Naoki Takata, Masato Ishihara, Satoshi Nakatsuka, Asuka Suzuki, Makoto Kobashi

    2018 MRS Fall Meeting & Exhibit  2018.11 

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    Event date: 2018.11

    Presentation type:Oral presentation (general)  

    Venue:Boston(USA)   Country:United States  

  172. Effect of Impurity Solute Atoms on Strength of α-Al (fcc) Single-Crystal Micropillars International conference

    Souichiro Takeyasu, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    2018 MRS Fall Meeting & Exhibit  2018.11 

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    Event date: 2018.11

    Presentation type:Poster presentation  

    Venue:Boston(USA)   Country:United States  

  173. Microstructures and Their Thermal Stability of Al-Based Eutectic Alloys Strengthened by Intermetallic Phases in Al-Zn-Mg Ternary System International conference

    Taiki Okano, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    2018 MRS Fall Meeting & Exhibit  2018.11 

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    Event date: 2018.11

    Presentation type:Poster presentation  

    Venue:Boston(USA)   Country:United States  

  174. Structural Control of Porous Nickel Aluminides Fabricated by Reactive Synthesis with Space Holder Powder International conference

    Asuka Suzuki, Yunmao Shu, Naoki Takata, Makoto Kobashi

    2018 MRS Fall Meeting & Exhibit  2018.11 

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    Event date: 2018.11

    Presentation type:Poster presentation  

    Venue:Boston(USA)   Country:United States  

  175. Effect of Impurity Solute Atoms on Strength of α-Al (fcc) Single-Crystal Micropillars International conference

    Souichiro Takeyasu, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    2018 MRS Fall Meeting & Exhibit  2018.11 

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    Event date: 2018.11

    Presentation type:Poster presentation  

    Venue:Boston(USA)   Country:United States  

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  176. Microstructures and Their Thermal Stability of Al-Based Eutectic Alloys Strengthened by Intermetallic Phases in Al-Zn-Mg Ternary System International conference

    Taiki Okano, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    2018 MRS Fall Meeting & Exhibit  2018.11 

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    Event date: 2018.11

    Presentation type:Poster presentation  

    Venue:Boston(USA)   Country:United States  

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  177. Microstructure and Strength of Heat-Resistant Aluminum Alloy Strengthened by T-Al6Mg11Zn11 Intermetallic Phase International conference

    Naoki Takata, Masato Ishihara, Satoshi Nakatsuka, Asuka Suzuki, Makoto Kobashi

    2018 MRS Fall Meeting & Exhibit  2018.11 

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    Event date: 2018.11

    Presentation type:Oral presentation (general)  

    Venue:Boston(USA)   Country:United States  

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  178. Structural Control of Porous Nickel Aluminides Fabricated by Reactive Synthesis with Space Holder Powder International conference

    Asuka Suzuki, Yunmao Shu, Naoki Takata, Makoto Kobashi

    2018 MRS Fall Meeting & Exhibit  2018.11 

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    Event date: 2018.11

    Presentation type:Poster presentation  

    Venue:Boston(USA)   Country:United States  

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  179. CaH2を用いた SiO2被覆 Feナノ粒子の合成と特性評価

    杉浦 俊彦、松本 章宏、山本 真平、小橋 眞、高田 尚記、鈴木 飛鳥

    粉体粉末冶金協会 平成30年度秋季大会  2018.10  一般社団法人粉体粉末冶金協会

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    Event date: 2018.10

    Presentation type:Oral presentation (general)  

    Venue:朱鷺メッセ新潟コンベンションセンター   Country:Japan  

  180. 樹脂/Al接合用ポーラス層の構造に及ぼすレーザ照射条件の影響

    加藤 留意,鈴木飛鳥,高田尚記,小橋眞

    粉体粉末冶金協会 平成30年度秋季大会  2018.10  一般社団法人粉体粉末冶金協会

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    Event date: 2018.10

    Presentation type:Oral presentation (general)  

    Venue:朱鷺メッセ新潟コンベンションセンター   Country:Japan  

  181. 反応焼結による多孔質層を利用した Fe/樹脂接合体の界面形態制御と強度評価

    則竹 一樹,鈴木飛鳥,高田尚記,小橋眞

    粉体粉末冶金協会 平成30年度秋季大会  2018.10  一般社団法人粉体粉末冶金協会

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    Event date: 2018.10

    Presentation type:Oral presentation (general)  

    Venue:朱鷺メッセ新潟コンベンションセンター   Country:Japan  

  182. レーザ積層造形法により作製された AlSi10Mgラティス構造体の微視組織

    劉 牧霖,高田尚記,鈴木飛鳥,小橋眞

    粉体粉末冶金協会 平成30年度秋季大会  2018.10  一般社団法人粉体粉末冶金協会

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    Event date: 2018.10

    Presentation type:Oral presentation (general)  

    Venue:朱鷺メッセ新潟コンベンションセンター   Country:Japan  

  183. 積層造形マルエージング鋼の造形条件による組織および特性の制御

    鈴木飛鳥,西田亮也,高田尚記,小橋眞,加藤正樹

    粉体粉末冶金協会 平成30年度秋季大会  2018.10  一般社団法人粉体粉末冶金協会

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    Event date: 2018.10

    Presentation type:Oral presentation (general)  

    Venue:朱鷺メッセ新潟コンベンションセンター   Country:Japan  

  184. CaH2を用いた SiO2被覆 Feナノ粒子の合成と特性評価

    杉浦 俊彦, 松本 章宏, 山本 真平, 小橋 眞, 高田 尚記, 鈴木 飛鳥

    粉体粉末冶金協会 平成30年度秋季大会  2018.10  一般社団法人粉体粉末冶金協会

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    Event date: 2018.10

    Presentation type:Oral presentation (general)  

    Venue:朱鷺メッセ新潟コンベンションセンター   Country:Japan  

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  185. レーザ積層造形法により作製された AlSi10Mgラティス構造体の微視組織

    劉 牧霖, 高田尚記, 鈴木飛鳥, 小橋眞

    粉体粉末冶金協会 平成30年度秋季大会  2018.10  一般社団法人粉体粉末冶金協会

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    Event date: 2018.10

    Presentation type:Oral presentation (general)  

    Venue:朱鷺メッセ新潟コンベンションセンター   Country:Japan  

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  186. 反応焼結による多孔質層を利用した Fe/樹脂接合体の界面形態制御と強度評価

    則竹 一樹, 鈴木飛鳥, 高田尚記, 小橋眞

    粉体粉末冶金協会 平成30年度秋季大会  2018.10  一般社団法人粉体粉末冶金協会

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    Event date: 2018.10

    Presentation type:Oral presentation (general)  

    Venue:朱鷺メッセ新潟コンベンションセンター   Country:Japan  

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  187. 積層造形マルエージング鋼の造形条件による組織および特性の制御

    鈴木飛鳥, 西田亮也, 高田尚記, 小橋眞, 加藤正樹

    粉体粉末冶金協会 平成30年度秋季大会  2018.10  一般社団法人粉体粉末冶金協会

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    Event date: 2018.10

    Presentation type:Oral presentation (general)  

    Venue:朱鷺メッセ新潟コンベンションセンター   Country:Japan  

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  188. 樹脂/Al接合用ポーラス層の構造に及ぼすレーザ照射条件の影響

    加藤 留意, 鈴木飛鳥, 高田尚記, 小橋眞

    粉体粉末冶金協会 平成30年度秋季大会  2018.10  一般社団法人粉体粉末冶金協会

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    Event date: 2018.10

    Presentation type:Oral presentation (general)  

    Venue:朱鷺メッセ新潟コンベンションセンター   Country:Japan  

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  189. 選択的レーザ溶融法により造形されたAlSi10Mg合金ラティス構造体の熱処理に伴う圧縮特性の変化

    鈴木飛鳥,関沢圭人,高田尚記,小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

  190. Siを固溶したフェライト固相とZn液相の特異な異相界面反応

    高田尚記,早野邦尚,鈴木飛鳥,小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (invited, special)  

    Venue:東北大学   Country:Japan  

  191. α-Fe相と溶融Zn-6Al-3Mg合金の固液界面反応

    横井宏紀,高田尚記,鈴木飛鳥,小橋眞,石井康太郎,古賀慎一

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

  192. 選択的レーザー溶融法による積層造形マルエージング鋼の特性に及ぼすレーザー照射条件の影響

    西田亮也,鈴木飛鳥,高田尚記,小橋眞,加藤正樹

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

  193. α-Al/T-Al6Mg11Zn112相域の異なるtie-lineを利用した共晶合金の凝固組織

    岡野大幹,高田尚記,鈴木飛鳥,小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

  194. T-Al6Mg11Zn11相と異なるtie-lineを持つα-Al母相からのT相の析出

    高木力斗,高田尚記,鈴木飛鳥,小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

  195. レーザー誘起燃焼合成によるFe基板上への樹脂接合用ポーラス層の形成

    植田裕斗 ,鈴木飛鳥,高田尚記,小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

  196. 粉末及びレーザープロセスによるAl基板上のポーラス層を介したAl/Polyamide-6接合

    金昇光 ,鈴木飛鳥,高田尚記,小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

  197. 金属3Dプリンタが生み出す特異な組織と塑性変形挙動

    高田尚記,小平寛久,関沢圭人,鈴木飛鳥,小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (keynote)  

    Venue:東北大学   Country:Japan  

  198. α-Al単結晶マイクロピラーの強度のサイズ依存性に及ぼす純度の影響

    竹安崇一郎 ,高田尚記,鈴木飛鳥,小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

  199. 選択的レーザ溶融法により作製されたセル形状AlSi10Mg造形体の微視組織

    劉牧霖 ,鈴木飛鳥,高田尚記,小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

  200. Siを固溶したフェライト固相とZn液相の特異な異相界面反応

    高田尚記, 早野邦尚, 鈴木飛鳥, 小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (invited, special)  

    Venue:東北大学   Country:Japan  

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  201. レーザー誘起燃焼合成によるFe基板上への樹脂接合用ポーラス層の形成

    植田裕斗, 鈴木飛鳥, 高田尚記, 小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

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  202. α-Fe相と溶融Zn-6Al-3Mg合金の固液界面反応

    横井宏紀, 高田尚記, 鈴木飛鳥, 小橋眞, 石井康太郎, 古賀慎一

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

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  203. α-Al単結晶マイクロピラーの強度のサイズ依存性に及ぼす純度の影響

    竹安崇一郎, 高田尚記, 鈴木飛鳥, 小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

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  204. α-Al/T-Al6Mg11Zn112相域の異なるtie-lineを利用した共晶合金の凝固組織

    岡野大幹, 高田尚記, 鈴木飛鳥, 小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

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  205. T-Al6Mg11Zn11相と異なるtie-lineを持つα-Al母相からのT相の析出

    高木力斗, 高田尚記, 鈴木飛鳥, 小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

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  206. 粉末及びレーザープロセスによるAl基板上のポーラス層を介したAl/Polyamide-6接合

    金昇光, 鈴木飛鳥, 高田尚記, 小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

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  207. 金属3Dプリンタが生み出す特異な組織と塑性変形挙動

    高田尚記, 小平寛久, 関沢圭人, 鈴木飛鳥, 小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (keynote)  

    Venue:東北大学   Country:Japan  

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  208. 選択的レーザ溶融法により造形されたAlSi10Mg合金ラティス構造体の熱処理に伴う圧縮特性の変化

    鈴木飛鳥, 関沢圭人, 高田尚記, 小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

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  209. 選択的レーザ溶融法により作製されたセル形状AlSi10Mg造形体の微視組織

    劉牧霖, 鈴木飛鳥, 高田尚記, 小橋眞

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

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  210. 選択的レーザー溶融法による積層造形マルエージング鋼の特性に及ぼすレーザー照射条件の影響

    西田亮也, 鈴木飛鳥, 高田尚記, 小橋眞, 加藤正樹

    日本金属学会秋期講演大会/日本鉄鋼協会秋季講演大会  2018.9 

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    Event date: 2018.9 - 2019.9

    Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

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  211. Bonding strength of Al/resin joint via functionally graded interpenetrating phase layer International conference

    Asuka Suzuki, Yuta Arai, Naoki Takata, Makoto Kobashi

    ISFGMs 2018  2018.8 

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    Event date: 2018.8

    Presentation type:Oral presentation (general)  

    Venue:Kitakyushu   Country:Japan  

  212. Structural control and bonding strength evaluation of Fe/resin joints via functionally graded interpenetrating phase layer International conference

    Kazuki Noritake, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    ISFGMs 2018  2018.8 

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    Event date: 2018.8

    Presentation type:Poster presentation  

    Venue:Kitakyushu   Country:Japan  

  213. Effect of Al/Ni Molar Ratio on Cell Morphology and Constituting Phase of Porous Ni-Al Intermetallic Compounds International conference

    Yunmao Shu, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    ISFGMs 2018  2018.8 

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    Event date: 2018.8

    Presentation type:Oral presentation (general)  

    Venue:Kitakyushu   Country:Japan  

  214. Bonding strength of Al/resin joint via functionally graded interpenetrating phase layer International conference

    Asuka Suzuki, Yuta Arai, Naoki Takata, Makoto Kobashi

    ISFGMs 2018  2018.8 

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    Event date: 2018.8

    Presentation type:Oral presentation (general)  

    Venue:Kitakyushu   Country:Japan  

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  215. Effect of Al/Ni Molar Ratio on Cell Morphology and Constituting Phase of Porous Ni-Al Intermetallic Compounds International conference

    Yunmao Shu, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    ISFGMs 2018  2018.8 

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    Event date: 2018.8

    Presentation type:Oral presentation (general)  

    Venue:Kitakyushu   Country:Japan  

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  216. Structural control and bonding strength evaluation of Fe/resin joints via functionally graded interpenetrating phase layer International conference

    Kazuki Noritake, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    ISFGMs 2018  2018.8 

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    Event date: 2018.8

    Presentation type:Poster presentation  

    Venue:Kitakyushu   Country:Japan  

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  217. Solidification Microstructures of alpha-Al/Intermetallics Eutectic Alloys in Al-Zn-Mg Ternary System International conference

    Naoki Takata,Taiki Okano,Asuka Suzuki,Makoto Kobashi

    Themec 2018  2018.7 

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    Event date: 2018.7

    Presentation type:Oral presentation (invited, special)  

    Venue:Paris, France   Country:France  

  218. Solidification Microstructures of alpha-Al/Intermetallics Eutectic Alloys in Al-Zn-Mg Ternary System International conference

    Naoki Takata, Taiki Okano, Asuka Suzuki, Makoto Kobashi

    Themec 2018  2018.7 

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    Event date: 2018.7

    Presentation type:Oral presentation (invited, special)  

    Venue:Paris, France   Country:France  

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  219. Size Dependence of Strength of Single-Crystal Pure Aluminum Micropillars International conference

    Naoki Takata,Souichiro Takeyasu,Asuka Suzuki,Makoto Kobashi

    Sixth International Indentation Workshop (IIW6)  2018.7 

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    Event date: 2018.7

    Presentation type:Oral presentation (general)  

    Country:Japan  

  220. Size Dependence of Strength of Single-Crystal Pure Aluminum Micropillars International conference

    Naoki Takata, Souichiro Takeyasu, Asuka Suzuki, Makoto Kobashi

    Sixth International Indentation Workshop (IIW6)  2018.7 

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    Event date: 2018.7

    Presentation type:Oral presentation (general)  

    Country:Japan  

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  221. Texrure Development of AlSi10Mg Alloy Fabricated by Selectively Laser Melting International conference

    aoki Takata,Hirohisa Kodaira,Asuka Suzuki,Makoto Kobashi

    2018ICAA16  2018.6 

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    Event date: 2018.6

    Presentation type:Oral presentation (general)  

    Venue:Motreal, Canada   Country:Canada  

  222. Microstructure Characteristics of Protruding Anchor Layer Fabricated by Laser-Induced Combustion Synthesis of Al-Ti-C System International conference

    Seung Gwang Kim, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    2018ICAA16  2018.6 

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    Event date: 2018.6

    Presentation type:Oral presentation (general)  

    Venue:Motreal, Canada   Country:Canada  

  223. Microstructure Characteristics of Protruding Anchor Layer Fabricated by Laser-Induced Combustion Synthesis of Al-Ti-C System International conference

    Seung Gwang Kim, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    2018ICAA16  2018.6 

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    Event date: 2018.6

    Presentation type:Oral presentation (general)  

    Venue:Motreal, Canada   Country:Canada  

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  224. Texrure Development of AlSi10Mg Alloy Fabricated by Selectively Laser Melting International conference

    aoki Takata, Hirohisa Kodaira, Asuka Suzuki, Makoto Kobashi

    2018ICAA16  2018.6 

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    Event date: 2018.6

    Presentation type:Oral presentation (general)  

    Venue:Motreal, Canada   Country:Canada  

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  225. 計算状態図を利用した実用アルミニウム鋳造合金AC2Bの熱処理条件最適化の試み

    中塚怜志,高田尚記,鈴木飛鳥,小橋眞

    軽金属学会第134回春期講演大会  2018.5.26  一般社団法人軽金属学会

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    Event date: 2018.5

    Presentation type:Oral presentation (general)  

    Venue:熊本大学   Country:Japan  

  226. 組成の異なる耐熱Al-Mg-Zn鍛造合金の時効処理に伴う組織変化

    髙木力斗, 石原雅人, 高田尚記, 鈴木飛鳥, 小橋眞

    軽金属学会第134回春期講演大会  2018.5.26  一般社団法人軽金属学会

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    Event date: 2018.5

    Presentation type:Poster presentation  

    Venue:熊本大学   Country:Japan  

  227. 共晶反応を利用した耐熱Al基鋳造合金の凝固組織とその高温安定性

    岡野大幹, 高田尚記, 鈴木飛鳥, 小橋眞

    軽金属学会第134回春期講演大会  2018.5.26  一般社団法人軽金属学会

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    Event date: 2018.5

    Presentation type:Poster presentation  

    Venue:熊本大学   Country:Japan  

  228. アルミニウム合金に形成した層状複水酸化物皮膜の微細構造解析

    高田尚記, 嶋田雄太, 芹澤愛, 石崎貴裕, 小橋眞

    軽金属学会第134回春期講演大会  2018.5.27  一般社団法人軽金属学会

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    Event date: 2018.5

    Presentation type:Oral presentation (general)  

    Venue:熊本大学   Country:Japan  

  229. アルミニウム合金に形成した層状複水酸化物皮膜の微細構造解析

    高田尚記, 嶋田雄太, 芹澤愛, 石崎貴裕, 小橋眞

    軽金属学会第134回春期講演大会  2018.5.27  一般社団法人軽金属学会

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    Event date: 2018.5

    Presentation type:Oral presentation (general)  

    Venue:熊本大学   Country:Japan  

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  230. 共晶反応を利用した耐熱Al基鋳造合金の凝固組織とその高温安定性

    岡野大幹, 高田尚記, 鈴木飛鳥, 小橋眞

    軽金属学会第134回春期講演大会  2018.5.26  一般社団法人軽金属学会

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    Event date: 2018.5

    Presentation type:Poster presentation  

    Venue:熊本大学   Country:Japan  

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  231. 計算状態図を利用した実用アルミニウム鋳造合金AC2Bの熱処理条件最適化の試み

    中塚怜志, 高田尚記, 鈴木飛鳥, 小橋眞

    軽金属学会第134回春期講演大会  2018.5.26  一般社団法人軽金属学会

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    Event date: 2018.5

    Presentation type:Oral presentation (general)  

    Venue:熊本大学   Country:Japan  

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  232. 組成の異なる耐熱Al-Mg-Zn鍛造合金の時効処理に伴う組織変化

    髙木力斗, 石原雅人, 高田尚記, 鈴木飛鳥, 小橋眞

    軽金属学会第134回春期講演大会  2018.5.26  一般社団法人軽金属学会

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    Event date: 2018.5

    Presentation type:Poster presentation  

    Venue:熊本大学   Country:Japan  

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  233. 燃焼合成法による Al系金属間化合物の発泡に及ぼすプリカーサ相対密度の影響

    和田 崇郁,鈴木飛鳥,高田尚記,小橋眞

    粉体粉末冶金協会 平成30年度春季大会  2018.5.15  一般社団法人粉体粉末冶金協会

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    Event date: 2018.5

    Presentation type:Oral presentation (general)  

    Venue:京都大学   Country:Japan  

  234. レーザー誘起燃焼合成による Fe基板上への樹脂接合用隆起アンカーの形成

    植田 裕斗,鈴木飛鳥,高田尚記,小橋眞

    粉体粉末冶金協会 平成30年度春季大会  2018.5.15  一般社団法人粉体粉末冶金協会

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    Event date: 2018.5

    Presentation type:Oral presentation (general)  

    Venue:京都大学   Country:Japan  

  235. レーザー誘起燃焼合成による Fe基板上への樹脂接合用隆起アンカーの形成

    植田 裕斗, 鈴木飛鳥, 高田尚記, 小橋眞

    粉体粉末冶金協会 平成30年度春季大会  2018.5.15  一般社団法人粉体粉末冶金協会

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    Event date: 2018.5

    Presentation type:Oral presentation (general)  

    Venue:京都大学   Country:Japan  

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  236. 燃焼合成法による Al系金属間化合物の発泡に及ぼすプリカーサ相対密度の影響

    和田 崇郁, 鈴木飛鳥, 高田尚記, 小橋眞

    粉体粉末冶金協会 平成30年度春季大会  2018.5.15  一般社団法人粉体粉末冶金協会

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    Event date: 2018.5

    Presentation type:Oral presentation (general)  

    Venue:京都大学   Country:Japan  

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  237. 粉末床溶融結合法により作製したAlSi10Mg合金における組織の造形サイズ依存性

    高田尚記,小平寛久,鈴木飛鳥,小橋眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2018.3.20  公益社団法人日本金属学会

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    Event date: 2018.3

    Presentation type:Oral presentation (general)  

    Venue:千葉工業大学   Country:Japan  

  238. 発熱焼結助剤を用いた鉄系粉末の反応焼結プロセスの検討

    鈴木飛鳥,青木陽汰 ,高田尚記,小橋眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2018.3.20  公益社団法人日本金属学会

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    Event date: 2018.3

    Presentation type:Oral presentation (general)  

    Venue:千葉工業大学   Country:Japan  

  239. 発熱焼結助剤を用いた鉄系粉末の反応焼結プロセスの検討

    鈴木飛鳥, 青木陽汰, 高田尚記, 小橋眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2018.3.20  公益社団法人日本金属学会

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    Event date: 2018.3

    Presentation type:Oral presentation (general)  

    Venue:千葉工業大学   Country:Japan  

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  240. 粉末床溶融結合法により作製したAlSi10Mg合金における組織の造形サイズ依存性

    高田尚記, 小平寛久, 鈴木飛鳥, 小橋眞

    日本金属学会春期講演大会/日本鉄鋼協会春季講演大会  2018.3.20  公益社団法人日本金属学会

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    Event date: 2018.3

    Presentation type:Oral presentation (general)  

    Venue:千葉工業大学   Country:Japan  

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  241. Solid Fe/Liquid Zn interfacial reaction of Hot-Dip Galvanaized Fe-Si Alloy Sheets International conference

    N. Takata, K. Hayano, A.Suzuki and M.Kobashi

    GALVATEC2017  2017.11.12 

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    Event date: 2017.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Tokyo   Country:Japan  

  242. Solid Fe/Liquid Zn interfacial reaction of Hot-Dip Galvanaized Fe-Si Alloy Sheets International conference

    N. Takata, K. Hayano, A.Suzuki, M.Kobashi

    GALVATEC2017  2017.11.12 

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    Event date: 2017.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Tokyo   Country:Japan  

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  243. Powder Processing Route for Making Interpenetrating Anchor Structure for Metal/Polymer Joint International conference

    Makoto KOBASHI

    JSPM International Conference on Powder and Powder Metallurgy ~60th Anniversary~  2017.11.8 

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    Event date: 2017.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Kyoto University   Country:Japan  

  244. Direct joining between metal and polymer using protruding anchor layer fabricated by laser-induced combustion synthesis International conference

    eung Gwang KIM, Asuka SUZUKI, Naoki TAKATA, Makoto KOBASHI

    JSPM International Conference on Powder and Powder Metallurgy ~62th Anniversary~  2017.11.8 

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    Event date: 2017.11

    Presentation type:Poster presentation  

    Country:Japan  

  245. Fabrication of porous TiB2/Fe composite on iron substrate utilizing combustion synthesis reaction International conference

    Kazuki NORITAKE, Asuka SUZUKI, Naoki TAKATA, Makoto KOBASHI

    JSPM International Conference on Powder and Powder Metallurgy ~61th Anniversary~  2017.11.8 

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    Event date: 2017.11

    Presentation type:Poster presentation  

    Country:Japan  

  246. Powder Processing Route for Making Interpenetrating Anchor Structure for Metal/Polymer Joint International conference

    Makoto KOBASHI, Naoki TAKATA, Asuka SUZUKI

    JSPM International Conference on Powder and Powder Metallurgy ~60th Anniversary~  2017.11.8 

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    Event date: 2017.11

    Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  247. Powder Processing Route for Making Interpenetrating Anchor Structure for Metal/Polymer Joint International conference

    Makoto KOBASHI, Naoki TAKATA, Asuka SUZUKI

    JSPM International Conference on Powder and Powder Metallurgy ~60th Anniversary~  2017.11.8 

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    Event date: 2017.11

    Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  248. Direct joining between metal and polymer using protruding anchor layer fabricated by laser-induced combustion synthesis International conference

    eung Gwang KIM, Asuka SUZUKI, Naoki TAKATA, Makoto KOBASHI

    JSPM International Conference on Powder and Powder Metallurgy ~62th Anniversary~  2017.11.8 

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    Event date: 2017.11

    Presentation type:Poster presentation  

    Country:Japan  

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  249. Fabrication of porous TiB2/Fe composite on iron substrate utilizing combustion synthesis reaction International conference

    Kazuki NORITAKE, Asuka SUZUKI, Naoki TAKATA, Makoto KOBASHI

    JSPM International Conference on Powder and Powder Metallurgy ~61th Anniversary~  2017.11.8 

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    Event date: 2017.11

    Presentation type:Poster presentation  

    Country:Japan  

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  250. Powder Processing Route for Making Interpenetrating Anchor Structure for Metal/Polymer Joint International conference

    Makoto KOBASHI

    JSPM International Conference on Powder and Powder Metallurgy ~60th Anniversary~  2017.11.8 

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    Event date: 2017.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Kyoto University   Country:Japan  

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  251. Anchor Bonding between Al and resin utilizing interpenetrating phase layer International conference

    A. Suzuki, Y. Arai, N. Takata and M. Kobashi

    Metfoam2017  2017.9.15 

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    Event date: 2017.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Nanjing, China   Country:China  

  252. Fabrication of bi-modal porous intermetallic compounds by combustion synthesis reaction between Al and Ni International conference

    Y. Shu, A. Suzuki, N. Takata and M. Kobashi

    Metfoam2017  2017.9.15 

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    Event date: 2017.9

    Language:English   Presentation type:Poster presentation  

    Venue:Nanjing, China   Country:China  

  253. Fabrication of bi-modal porous intermetallic compounds by combustion synthesis reaction between Al and Ni International conference

    Y. Shu, A. Suzuki, N. Takata, M. Kobashi

    Metfoam2017  2017.9.15 

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    Event date: 2017.9

    Language:English   Presentation type:Poster presentation  

    Venue:Nanjing, China   Country:China  

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  254. Anchor Bonding between Al and resin utilizing interpenetrating phase layer International conference

    A. Suzuki, Y. Arai, N. Takata, M. Kobashi

    Metfoam2017  2017.9.15 

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    Event date: 2017.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Nanjing, China   Country:China  

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  255. α-Al単結晶マイクロピラーの強度のサイズ効果に及ぼす予加工の影響

    竹安崇一郎,高田尚記,鈴木飛鳥,小橋眞

    日本金属学会第161回秋期講演大会  2017.9.8  公益社団法人日本金属学会

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  256. 溶融Zn-Al合金めっき鋼板のFe-Al金属間化合物層形成に及ぼす固溶Siの影響

    早野邦尚,高田尚記,鈴木飛鳥,小橋眞

    日本金属学会第161回秋期講演大会  2017.9.8  公益社団法人日本金属学会

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  257. Al‐Zn‐Mg3元系におけるα‐Al/T‐Al6Mg11Zn11及びα-Al/η‐Zn2Mg2相共晶合金の凝固組織

    岡野大幹,高田尚記,鈴木飛鳥,小橋眞

    日本金属学会第161回秋期講演大会  2017.9.8  公益社団法人日本金属学会

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  258. Al-Mg-Zn 3元系合金におけるα-Al母相からのT-Al6Mg11Zn11相の析出

    石原雅人, 高田尚記,鈴木飛鳥,小橋眞

    日本金属学会第161回秋期講演大会  2017.9.8  公益社団法人日本金属学会

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  259. 金属間化合物を強化相としたアルミニウム基超合金の設計の可能性

    高田尚記,石原雅人,岡野大幹,鈴木飛鳥,小橋眞

    日本金属学会第161回秋期講演大会  2017.9.8  公益社団法人日本金属学会

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (keynote)  

  260. 金属間化合物を強化相としたアルミニウム基超合金の設計の可能性

    高田尚記, 石原雅人, 岡野大幹, 鈴木飛鳥, 小橋眞

    日本金属学会第161回秋期講演大会  2017.9.8  公益社団法人日本金属学会

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (keynote)  

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  261. 溶融Zn-Al合金めっき鋼板のFe-Al金属間化合物層形成に及ぼす固溶Siの影響

    早野邦尚, 高田尚記, 鈴木飛鳥, 小橋眞

    日本金属学会第161回秋期講演大会  2017.9.8  公益社団法人日本金属学会

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  262. α-Al単結晶マイクロピラーの強度のサイズ効果に及ぼす予加工の影響

    竹安崇一郎, 高田尚記, 鈴木飛鳥, 小橋眞

    日本金属学会第161回秋期講演大会  2017.9.8  公益社団法人日本金属学会

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  263. Al-Mg-Zn 3元系合金におけるα-Al母相からのT-Al6Mg11Zn11相の析出

    石原雅人, 高田尚記, 鈴木飛鳥, 小橋眞

    日本金属学会第161回秋期講演大会  2017.9.8  公益社団法人日本金属学会

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  264. Al‐Zn‐Mg3元系におけるα‐Al/T‐Al6Mg11Zn11及びα-Al/η‐Zn2Mg2相共晶合金の凝固組織

    岡野大幹, 高田尚記, 鈴木飛鳥, 小橋眞

    日本金属学会第161回秋期講演大会  2017.9.8  公益社団法人日本金属学会

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  265. 多機能化を目指したポーラス金属の開発と構造制御

    小橋 眞

    粉体粉末冶金協会春季大会  2017.5.31  粉体粉末冶金協会

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    Event date: 2017.5 - 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:早稲田大学   Country:Japan  

  266. 多機能化を目指したポーラス金属の開発と構造制御

    小橋 眞

    粉体粉末冶金協会春季大会  2017.5.31  粉体粉末冶金協会

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    Event date: 2017.5 - 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:早稲田大学   Country:Japan  

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  267. B4C,Ti間反応を利用したTi基複合材料のセラミック体積率制御

    大里智樹, 高田尚記,小橋眞

    粉体粉末冶金協会第119回春季大会  2017.5.31  一般社団法人粉体粉末冶金協会

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    Event date: 2017.5 - 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:早稲田大学   Country:Japan  

  268. TiC‐FeAlの機械的特性に与えるプロセス因子の影響

    後藤貴昭,松本章宏,小橋眞,髙田尚記

    粉体粉末冶金協会第119回春季大会  2017.5.31  一般社団法人粉体粉末冶金協会

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    Event date: 2017.5 - 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:早稲田大学   Country:Japan  

  269. レーザープロセスによるポジティブアンカー構造を用いたPA6/Al接合合金継手の高温強度

    金昇光,高田尚記,小橋眞

    粉体粉末冶金協会第119回春季大会  2017.5.31  一般社団法人粉体粉末冶金協会

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    Event date: 2017.5 - 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:早稲田大学   Country:Japan  

  270. 燃焼合成反応を利用したTiB2/Feポーラス材料の合成と鉄基板との同時接合

    則竹一樹, 高田尚記,小橋眞

    粉体粉末冶金協会第119回春季大会  2017.5.31  一般社団法人粉体粉末冶金協会

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    Event date: 2017.5 - 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:早稲田大学   Country:Japan  

  271. 燃焼合成反応を利用したTiB2/Feポーラス材料の合成と鉄基板との同時接合

    則竹一樹, 高田尚記, 小橋眞

    粉体粉末冶金協会第119回春季大会  2017.5.31  一般社団法人粉体粉末冶金協会

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    Event date: 2017.5 - 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:早稲田大学   Country:Japan  

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  272. レーザープロセスによるポジティブアンカー構造を用いたPA6/Al接合合金継手の高温強度

    金昇光, 高田尚記, 小橋眞

    粉体粉末冶金協会第119回春季大会  2017.5.31  一般社団法人粉体粉末冶金協会

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    Event date: 2017.5 - 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:早稲田大学   Country:Japan  

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  273. B4C,Ti間反応を利用したTi基複合材料のセラミック体積率制御

    大里智樹, 高田尚記, 小橋眞

    粉体粉末冶金協会第119回春季大会  2017.5.31  一般社団法人粉体粉末冶金協会

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    Event date: 2017.5 - 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:早稲田大学   Country:Japan  

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  274. TiC‐FeAlの機械的特性に与えるプロセス因子の影響

    後藤貴昭, 松本章宏, 小橋眞, 髙田尚記

    粉体粉末冶金協会第119回春季大会  2017.5.31  一般社団法人粉体粉末冶金協会

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    Event date: 2017.5 - 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:早稲田大学   Country:Japan  

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  275. 計算状態図を基にしたアルミニウム基超合金の設計の可能性

    高田尚記,石原雅人,岡野大幹,小橋眞

    軽金属学会132回春期講演大会  2017.5.20  一般社団法人軽金属学会

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  276. 純Al単結晶マイクロピラーの強度に及ぼす試験片寸法の影響

    竹安崇一郎,高田尚記,小橋眞

    軽金属学会132回春期講演大会  2017.5.20  一般社団法人軽金属学会

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  277. 共晶反応を利用した耐熱Al基鋳造合金の設計と凝固組織

    岡野大幹,高田尚記,小橋眞

    軽金属学会132回春期講演大会  2017.5.20  一般社団法人軽金属学会

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  278. 耐熱Al-Mg-Zn鍛造合金の設計と時効処理に伴う組織変化

    石原雅人, 高田尚記,小橋眞

    軽金属学会132回春期講演大会  2017.5.20  一般社団法人軽金属学会

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  279. マイクロピラー圧縮試験を用いた局所力学特性評価のアルミニウム合金への適用

    高田尚記,竹安崇一郎,小橋眞

    軽金属学会132回春期講演大会  2017.5.20  一般社団法人軽金属学会

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  280. 計算状態図を基にしたアルミニウム基超合金の設計の可能性

    高田尚記, 石原雅人, 岡野大幹, 小橋眞

    軽金属学会132回春期講演大会  2017.5.20  一般社団法人軽金属学会

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

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  281. 純Al単結晶マイクロピラーの強度に及ぼす試験片寸法の影響

    竹安崇一郎, 高田尚記, 小橋眞

    軽金属学会132回春期講演大会  2017.5.20  一般社団法人軽金属学会

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

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  282. 耐熱Al-Mg-Zn鍛造合金の設計と時効処理に伴う組織変化

    石原雅人, 高田尚記, 小橋眞

    軽金属学会132回春期講演大会  2017.5.20  一般社団法人軽金属学会

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

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  283. 共晶反応を利用した耐熱Al基鋳造合金の設計と凝固組織

    岡野大幹, 高田尚記, 小橋眞

    軽金属学会132回春期講演大会  2017.5.20  一般社団法人軽金属学会

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

    researchmap

  284. マイクロピラー圧縮試験を用いた局所力学特性評価のアルミニウム合金への適用

    高田尚記, 竹安崇一郎, 小橋眞

    軽金属学会132回春期講演大会  2017.5.20  一般社団法人軽金属学会

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