Updated on 2022/12/06

写真a

 
TAKATA Naoki
 
Organization
Graduate School of Engineering Materials Process Engineering 1 Associate professor
Graduate School
Graduate School of Engineering
Undergraduate School
School of Engineering Materials Science and Engineering
Title
Associate professor
Contact information
メールアドレス

Degree 1

  1. Doctor (Engineering) ( 2006.3   Kyushu University ) 

Research Interests 5

  1. electron microscopy

  2. Metal additive manufacturing

  3. Microstructure

  4. Intermetallics

  5. Physical metallurgy

Research Areas 5

  1. Nanotechnology/Materials / Metallic material properties  / 機械的性質、塑性変形、高温強度

  2. Nanotechnology/Materials / Metals production and resources production  / 金属積層造形、レーザ粉末床溶融結合

  3. Nanotechnology/Materials / Material processing and microstructure control  / 平衡状態図、熱処理、塑性加工

  4. Nanotechnology/Materials / Nanomaterials  / 透過電子顕微鏡、ナノ・マイクロ機械試験

  5. Nanotechnology/Materials / Structural materials and functional materials  / アルミニウム合金、鉄鋼材料、表面処理鋼板

Current Research Project and SDGs 4

  1. 表面処理鋼板における高機能めっき皮膜の構造制御

  2. ナノ・マイクロ金属の強度・変形機構とそれに及ぼす材料強化因子の役割

  3. 耐用温度200℃を超える軽量超合金の設計と高強度化に資する組織制御

  4. 金属3Dプリンタ技術を活かした材料組織制御と高機能化

Research History 5

  1. University of Wisconsin-Madison   School of Engineering

    2013.3

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    Country:United States

  2. Brown University   School of Engineering   Visiting faculty

    2011.9 - 2011.12

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    Country:United States

  3. Assistant professor, Dept. Metallurgy and Ceramics Science, Tokyo Institue of Technology   Assistant Professor

    2007.10 - 2015.8

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    Country:Japan

  4. Max-Planck-Institut für Eisenforschung GmbH

    2007.3

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    Country:Germany

  5. Dpt. of Adaptive Machine Systems, Osaka University   Researcher

    2006.4 - 2007.9

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    Country:Japan

Education 3

  1. Kyushu University   Graduate School, Division of Integrated Science and Engineering

    - 2006.3

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    Country: Japan

  2. Kyushu University   Graduate School, Division of Integrated Science and Engineering

    - 2003.3

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    Country: Japan

  3. Kyushu University   Faculty of Engineering

    - 2001.3

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    Country: Japan

Professional Memberships 4

  1. Japan Institute of Metals and Materials

  2. The Iron and Steel Institue of Japan

  3. The Japan Institue of Light Metals

  4. The Japan Society for Heat Treatment

Committee Memberships 16

  1. Additive Manufacturing Letters   Editorial Board  

    2021.5   

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    Committee type:Academic society

    https://www.journals.elsevier.com/additive-manufacturing-letters/editorial-board

  2. ISIJ International   associate editor  

    2020.4   

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    Committee type:Academic society

    https://isijint.net/

  3. The 13th International Conference on Zinc and Zinc Alloy Coated Steel Sheet (Galvatech 2023)   International Advisory Board  

    2022.3   

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    Committee type:Academic society

  4. Research Council of KU Leuven   Reviewer  

    2021.3 - 2021.6   

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    Committee type:Other

  5. 日本鉄鋼協会 材料の組織と特性部会   表面処理鋼板学術委員会 委員  

    2020.4   

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    Committee type:Academic society

  6. Journal of Institute of Light Metals   associate editor  

    2019.10   

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    Committee type:Academic society

  7. Metals   Special Issue Editor "Advances in Selective Laser Melting"  

    2018.8 - 2019.9   

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    Committee type:Other

    https://www.mdpi.com/journal/metals/special_issues/selective_laser_melting

  8. 日本金属学会 講演大会第8分野(構造材料)   委員  

    2019.4   

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    Committee type:Academic society

  9. Tetsu-to-Hagané   Special Issue “Fundamentals and Application Technologies for High-performance Hot-dip Galvanized Coatings” Guest Editor  

    2018.3 - 2019.7   

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    Committee type:Academic society

    https://www.jstage.jst.go.jp/article/tetsutohagane/105/7/105_675/_article/-char/ja/

  10. 日本鉄鋼協会 材料の組織と特性部会   運営委員  

    2020.4   

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    Committee type:Academic society

  11. 国際鉄鋼科学シンポジウム(ISSS)企画WG   委員  

    2019.3   

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    Committee type:Academic society

  12. アルミニウム協会中長期需要技術開発委員会   ロードマップ小委員会 委員  

    2017.4   

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    Committee type:Academic society

  13. 日本金属学会・日本鉄鋼協会東海支部 支部評議員   支部評議員  

    2016.4   

  14. 軽金属学会東海支部 評議員   評議員  

    2016.4   

  15. 日本鉄鋼協会 論文誌編集委員会   専門委員  

    2016.4 - 2020.3   

  16. 軽金属学会 編集委員会   委員  

    2017.7 - 2019.9   

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    Committee type:Academic society

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Awards 10

  1. 令和 4 年度軽金属論文賞

    2022.11   一般社団法人 軽金属学会   Al-Mg-Zn3元系の共晶反応を利用した Al 基鋳造合金の凝固組織と室温破壊靭性

    岡野 直輝,相川 宗也,高田 尚記,鈴木 飛鳥,小橋 眞

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  2. 軽金属躍進賞

    2022.11   一般社団法人 軽金属学会  

    高田尚記

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    Award type:International academic award (Japan or overseas)  Country:Japan

  3. 日本鉄鋼協会 西山記念賞

    2022.3   日本鉄鋼協会   表面処理鋼板の溶融めっき皮膜構造制御

    高田尚記

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  4. 第11回わかしゃち奨励賞

    2017.1   愛知県   耐用温度200℃を超える革新的耐熱アルミニウム鍛造合金の設計

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    Award type:Award from publisher, newspaper, foundation, etc.  Country:Japan

  5. 軽金属論文賞

    2015.11   軽金属学会  

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    Country:Japan

  6. Outstanding Reviewer Status

    2015.11   Elsevier  

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    Country:Netherlands

  7. 日本鉄鋼協会 研究奨励賞

    2013.3   日本鉄鋼協会  

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    Country:Japan

  8. 第58回金属学会 組織写真賞奨励賞

    2008.3   日本金属学会  

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    Country:Japan

  9. Best Poster Award

    2007.6   International Conference on Recrystallization and Grain Growth III  

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    Country:Korea, Republic of

  10. 軽金属論文新人賞

    2004.11   軽金属学会  

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    Country:Japan

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Papers 176

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

    Li R., Takata N., Suzuki A., Kobashi M.

    Materials Science and Engineering A   Vol. 857   2022.11

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Materials Science and Engineering A  

    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.

    DOI: 10.1016/j.msea.2022.144055

    Scopus

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

    Zhu T., Li H., Takata N., Kobashi M., Yoshino M.

    Materials Science and Engineering A   Vol. 857   2022.11

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Materials Science and Engineering A  

    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 μm 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 μm, 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 μm. 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.

    DOI: 10.1016/j.msea.2022.144076

    Scopus

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

    Suzuki A., Shiba Y., Ibe H., Takata N., Kobashi M.

    Additive Manufacturing   Vol. 59   2022.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Additive Manufacturing  

    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.

    DOI: 10.1016/j.addma.2022.103089

    Scopus

  4. meso-structural Control on Metal Surfaces Based on Powder Metallurgy and Its Application to Metal/Polymer Joining Invited Reviewed

    Asuka Suzuki, Naoki Takatam Makoto Kobashi

    J. Soc. Powder Technolo., Japan   Vol. 59   page: 511 - 517   2022.10

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

    DOI: 10.4164/sptj.59.511

  5. Controllable tensile performance of additively manufactured Al–Fe alloy Reviewed International journal

    Qi X., Takata N., Suzuki A., Kobashi M., Kato M.

    Materials Science and Engineering A   Vol. 855   2022.10

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Materials Science and Engineering A  

    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.

    DOI: 10.1016/j.msea.2022.143893

    Scopus

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

    Iwata K., Suzuki A., Kim S.G., Takata N., Kobashi M.

    Journal of Materials Processing Technology   Vol. 306   2022.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Journal of Materials Processing Technology  

    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.

    DOI: 10.1016/j.jmatprotec.2022.117629

    Scopus

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

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

    MATERIALS   Vol. 15 ( 13 )   2022.7

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Materials  

    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◦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 θ-Al13Fe4 phase localized around melt-pool boundaries and several spherical metastable Al6Fe-phase particles surrounded by a nanoscale α-Al/Al6Fe cellular structure in the melt pools. The morphology of the θ phase remained almost unchanged even after 1000 h of exposure at 300◦C. Moreover, the nanoscale α-Al/Al6Fe cellular structure dissolved in the α-Al matrix; this was followed by the growth (and nucleation) of the spherical Al6Fe-phase particles and the precipitation of the θ phase. Numerous equiaxed grains were formed in the α-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◦C.

    DOI: 10.3390/ma15134497

    Web of Science

    Scopus

    Other Link: https://www.mdpi.com/1996-1944/15/13/4497

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

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

    Materials and Design   Vol. 219   2022.7

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Materials and Design  

    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 α-Al phases and the α-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 102 °C·s−1 in the FSC equipment. The sample solidified at 4 × 104 °C·s−1 exhibited a fine microstructure consisting of a primary α-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 α-Al phase solidified at a higher cooling rate. The secondary dendrite arm spacing (λ) of the primary α-Al phase decreased in the sample solidified at a higher cooling rate (dT/dt). The relation follows a general equation of λ = A (dT/dt)-n (A: 38.4, n: 0.33) in wide range of cooling rate (10-1 ∼ 104 °C·s−1). The results were utilized to discuss the cooling rate of Al alloys during the laser powder bed fusion (L-PBF) process.

    DOI: 10.1016/j.matdes.2022.110830

    Scopus

    Other Link: https://www.sciencedirect.com/science/article/pii/S026412752200452X

  9. 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 Reviewed

    Kato M., Suzuki A., McMillan M., Liu X., Takata N., Kobashi M.

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

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

    DOI: 10.2464/jilm.72.246

    Scopus

    Other Link: https://www.jstage.jst.go.jp/article/jilm/72/5/72_7205-T14/_article/-char/ja/

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

    Takata N., Liu M., Suzuki A., Kobashi M., Kato M., Iwai S., Adachi H.

    Keikinzoku/Journal of Japan Institute of Light Metals   Vol. 72 ( 5 ) page: 178 - 184   2022.5

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2464/jilm.72.178

    Scopus

    Other Link: https://www.jstage.jst.go.jp/article/jilm/72/5/72_7205-T08/_article/-char/ja/

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

    Suzuki A., Miyasaka T., Takata N., Kobashi M.

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

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

    DOI: 10.2464/jilm.72.164

    Scopus

    Other Link: https://www.jstage.jst.go.jp/article/jilm/72/5/72_7205-T06/_article/-char/ja/

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

    Takata N., Liu M., Suzuki A., Kobashi M., Kato M.

    Scripta Materialia   Vol. 213   2022.5

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Scripta Materialia  

    This article reports an unexpected finding of the mechanical behavior of Al-12%Si alloy manufactured using the laser powder bed fusion (L-PBF) process. The as-manufactured specimen has a negative strain rate sensitivity of flow stress at an early stage of tensile deformation (below 3% in strain). The post heat-treated specimens exhibited a positive strain-rate sensitivity and none of these specimens exhibited a serrated stress-strain curve, indicating a mechanism different from the Portevin–LeChatelier effect. Transmission electron microscopy revealed the dynamic precipitation of the nano-sized Si-phase inside the supersaturated solid solution of the α-Al matrix in the as-manufactured specimen deformed at ambient temperatures. The dynamically precipitated Si phase interacted with the introduced dislocations, enhancing the flow stress during the early stages of plastic deformation. The dynamic precipitation could contribute to the negative strain-rate sensitivity of the flow stress at an early stage of tensile deformation (including the yield strength).

    DOI: 10.1016/j.scriptamat.2022.114635

    Scopus

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

    Naoki Takata, Asuka Suzuki, Makoto Kobashi

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

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: doi.org/10.2320/materia.61.195

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

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

    Materials Science and Engineering A   Vol. 838   2022.3

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Materials Science and Engineering A  

    This study investigated the high-temperature strength of a hypereutectic Al–Fe binary alloy (Al–15%Fe) additive-manufactured by laser powder bed fusion (L-PBF). The L-PBF Al–15%Fe alloy exhibited superior yield strength to the other existing L-PBF processed alloys due to α-Al/Al6Fe eutectic structure with a nanoscale cellular morphology. The present results demonstrated the feasibility of using L-PBF processed Al–Fe alloys as high-temperature lightweight materials.

    DOI: 10.1016/j.msea.2022.142782

    Scopus

  15. Influence of Stabilizing Elements on Ductile-Brittle Transition Temperature (DBTT) of 18Cr Ferritic Stainless Steels Reviewed International journal

    Masataka Yoshino, Tetsuya Tagawa, Hongmei Li, Naoki Takata

    ISIJ International   Vol. 62 ( 4 )   2022.1

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Iron and Steel Institute of Japan  

    DOI: doi.org/10.2355/isijinternational.ISIJINT-2021-506

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

    Qi X., Takata N., Suzuki A., Kobashi M., Kato M.

    Journal of Materials Science and Technology   Vol. 97   page: 38 - 53   2022.1

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Journal of Materials Science and Technology  

    The present study addressed the change in the microstructure of Al–2.5 wt% Fe binary alloy produced using laser powder bed fusion (L-PBF) technique by thermal exposure at 300 °C, and the associated mechanical and thermal properties were systematically examined as well. Multi-semi-cylindrical patterns corresponding to melt pools in the microstructure were macroscopically observed for the as-manufactured sample. No change in the melt-pool morphology was observed after thermal exposure for 1000 h. Inside the melt pools, a large number of the nanoscale metastable Al6Fe phase particles were uniformly distributed inside columnar grains of the α-Al matrix containing concentrated solute Fe in supersaturation. The sequential formation and coarsening of stable θ-Al13Fe4 phases were observed upon exposure to a 300 °C environment, but a considerable amount of nano-sized metastable Al6Fe phases remained even after 1000 h. Furthermore, the thermal exposure continuously reduced the concentration of solute Fe atoms in the α-Al matrix. No significant grain growth was found in α-Al matrix after 1000 h owing to the pinning effect of the dispersed fine particles on grain boundary migration. These results demonstrate a sluggish change in microstructural morphologies of the Al–2.5 wt% Fe alloy. The quantified microstructural parameters addressed dominant strengthening contributions by the solid solution of Fe element and Orowan strengthening mechanism by fine Al–Fe intermetallics in the L-PBF-produced alloy. The high strength level was sustained even after being exposed to 300 °C for long periods. The superior balance of mechanical properties and thermal conductivity can be achieved in the experimental alloys by taking advantage of the various microstructural parameters related to the Al–Fe intermetallic phases and α-Al matrix.

    DOI: 10.1016/j.jmst.2021.04.038

    Scopus

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

    Okano N., Aikawa M., Takata N., Suzuki A., Kobashi M.

    Keikinzoku/Journal of Japan Institute of Light Metals   Vol. 72 ( 1 ) page: 79 - 87   2022

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Keikinzoku/Journal of Japan Institute of Light Metals  

    This study was set to examine the fundamentals of solidification microstructure and room-temperature fracture toughness of different eutectic aluminum (Al) alloys strengthened by T-Al6Mg11Zn11 and/or β-Al3Mg2 intermetallic phases. The thermodynamic calculations for an Al-Mg-Zn ternary system assessed three alloy compositions of Al-22.5Mg-23.5Zn, Al-35.5Mg-2Zn and Al-34.5Mg-5Zn (mol%) corresponding to α-Al/T, α-Al/β and α-Al/T/β eutectic compositions, respectively. The designed alloys were prepared by different cast process for changing the cooling rate in solidification. The Al-22.5Mg-23.5Zn and Al-35.5Mg-2Zn alloys exhibited a number of fibrous α phase surrounded by of T-phase and β-phase matrix, respectively. The morphologies of eutectic microstructures were refined by high cooling rate in solidification. The three-phase microstructure of α, T and β phases was often observed in slowly solidified Al-34.5Mg-5Zn alloy, whereas only the α/β two-phase eutectic microstructure was observed in the rapidly solidified alloy sample. The indentation fracture method using Vickers indentation test was applied to measure the room-temperature fracture toughness of the experimental alloys prepared by mold-casting. The α/β two-phase eutectic alloys exhibited a low fracture toughness of 1.1 MPa·m0.5 in comparison with the α/T two-phase eutectic alloy. The lower fracture toughness would be responsible for the brittleness of β-phase matrix in the α/β two-phase eutectic alloys.

    DOI: 10.2464/jilm.72.79

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  18. Influence of Stabilizing Elements on Ductile-Brittle Transition Temperature (DBTT) of 18Cr Ferritic Stainless Steels Reviewed International journal

    Yoshino M., Tagawa T., Li H., Takata N.

    ISIJ International   Vol. 62 ( 4 ) page: 788 - 798   2022

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    The influence of different stabilizing elements (Nb, Ti and Zr) which are added to stabilize interstitial elements in the ferrite matrix on the ductile-brittle transition temperature (DBTT) of 18Cr ferritic stainless steels was systematically investigated at different temperatures ranging from −25°C to 75°C. Hot-rolled sheets of 18 mass% Cr ferritic stainless steels containing a trace amount (0.1 atomic%) of Nb, Ti or Zr were studied. The added stabilizing elements formed precipitates of carbides/nitrides in all the steels tested in the present study. The particle diameter of the precipitates observed in the Nb-added steel was much smaller than those in the other steels. The measured DBTTs of the Base steel and the Nb-added, Ti-added and Zr-added steels were 39°C, −3°C, 39°C and 11°C, respectively. Although initiation of cleavage cracks in each steel occurred independent of the kind of stabilizing element, the Nb-added steel exhibited a relatively higher Charpy impact value due to ductile plastic deformation following cleavage crack initiation, resulting in a lower DBTT (superior impact toughness). The occurrence of plastic deformation in the Nb-added steel is considered to be due to the fine carbide and/or nitride precipitates which were homogenously distributed in the material. Detailed analyses of the fracture surfaces were also performed for the other steels, and the results were used as a basis for discussing the effects of each stabilizing element on the DBTT of 18Cr ferritic stainless steels in terms of the precipitation morphologies observed in the ferrite matrix.

    DOI: 10.2355/isijinternational.ISIJINT-2021-506

    Scopus

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

    Naoki TAKATA, Naoki OKANO, Motonari AIKAWA, Taiki OKANO, Asuka SUZUKI, Makoto KOBASHI

    Keikinzoku/Journal of Japan Institute of Light Metals   Vol. 72 ( 6 ) page: 381 - 387   2022

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2464/JILM.72.381

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  20. Influence of Added Fourth Elements on Precipitation in Heat-Resistant AlMgZn Ternary Alloys Reviewed International journal

    Ishii H., Takagi R., Takata N., Suzuki A., Kobashi M.

    Materials Transactions   Vol. 63 ( 4 ) page: 513 - 521   2022

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Materials Transactions  

    In the present study, we investigated the effects of Cu or Ni additions on the precipitation of intermetallic phases in the heat-resistant aluminum alloy with a ternary composition of Al5Mg3.5Zn (mol%). The quaternary alloys with 1 mol%Cu or 1 mol%Ni content were solution-treated at 480°C and subsequently aged at 300°C for different periods. Both Cu and Ni additions have a slight effect on the agehardening of these alloys at 300°C. The added Cu element partitioned into not only the T-Al6Mg11Zn11 phase but

    DOI: 10.2320/matertrans.MT-L2021021

    Scopus

    Other Link: https://www.jstage.jst.go.jp/article/matertrans/63/4/63_MT-L2021021/_article/-char/ja/

  21. Aluminum matrix composites reinforced with multi-walled carbon nanotubes and C<inf>60</inf> manufactured by laser powder bed fusion Reviewed International coauthorship International journal

        2022

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

    DOI: 10.1007/s10853-022-07119-6

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    Other Link: https://link.springer.com/article/10.1007/s10853-022-07119-6

  22. Influence of added fourth elements on creep properties of heat-resistant Al-Mg-Zn ternary alloys at 200°C Reviewed

    Kondo M., Suzuki T., Li R., Takata N.

    Keikinzoku/Journal of Japan Institute of Light Metals   Vol. 72 ( 6 ) page: 473 - 481   2022

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Keikinzoku/Journal of Japan Institute of Light Metals  

    The effect of Cu or Ni addition on creep properties of a heat-resistant aluminum (Al) alloy (with a composition of Al-5Mg-3.5Zn (mol%)) strengthened by precipitates of T-Al6Mg11Zn11 intermetallic phase was investigated. The quaternary alloys with various Cu contents (0.25-3 mol%) or Ni contents (0.5-2 mol%) were solution-treated at 470 °C and then aged at 200°C for 10 hours. The creep tests were conducted using the heat-treated specimens at 200°C under 105 MPa. Both Cu and Ni additions increased the creep rupture time. The 1 mol% Cu added alloy exhibited the longest creep rupture time due to the enhanced precipitation of the refined intragranular phases (T or MgZn2 phases). However, more than 2 mol% Cu addition led to the transition of T phase to S-Al2CuMg phase formed on grain boundaries. The phase transition might have a detrimental effect on creep rupture time. In the Ni-added alloy specimen, the creep rupture time became longest when 1 mol% Ni was added. The added Ni element promoted the formation of the Al3Ni phase on the grain boundaries, resulting in the suppression of connecting cavities formed on grain boundaries in creep deformation.

    DOI: 10.2464/JILM.72.473

    Scopus

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

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

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy   Vol. 69 ( 10 ) page: 417 - 425   2022

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy  

    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.

    DOI: 10.2497/jjspm.69.417

    Scopus

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

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

    Additive Manufacturing Letters   Vol. 1   page: 100008   2021.12

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

    DOI: 10.1016/j.addlet.2021.100008

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

    Takata N., Takagi R., Li R., Ishii H., Suzuki A., Kobashi M.

    Intermetallics   Vol. 139   2021.12

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Intermetallics  

    This study was undertaken to understand the fundamentals of T-Al6Mg11Zn11 intermetallic phase precipitation in heat-resistant Al–Mg–Zn ternary alloys, with the goal of further strength improvements. The thermodynamic assessment involved three alloy compositions, Al–4Mg–4.5Zn, Al–5Mg–3.5Zn, and Al–7Mg–1.5Zn (at%), with the T phase in a fixed fraction (approximately 6–7.5%) in equilibrium with the α-Al phase at 300 °C. The alloy compositions were set on different tie-lines between the α-Al and T phases in the two-phase region, resulting in varied compositions of each phase. In the three experimental alloys aged at 300 °C, the T phase precipitated on the grain boundaries of the α-Al matrix, and granular precipitates were homogeneously dispersed intragranularly. There was no significant difference in the precipitation morphology. It was demonstrated that the lattice parameters of the T and α-Al phases could be controlled based on the alloy composition and applied heat treatments. However, the lattice parameters have no significant effect on the precipitation morphologies of the thermodynamically stable T phase in the Al–Mg–Zn ternary alloys. The Zn-rich Al–4Mg–4.5Zn alloy exhibited a pronounced softening behavior after 10 h of aging due to the enhanced coarsening of precipitates in the α-Al matrix. The thermal instability of the precipitates was responsible for the transformation sequence from the initially formed metastable phases (η-Zn2Mg associated phases) to the stable T phase. These results provided a fundamental insight that alloy strengthening by introducing thermodynamically stable intermetallic phases is essential for sustaining the strength of heat-resistant Al–Mg–Zn ternary alloys after long-term treatment at elevated temperatures.

    DOI: 10.1016/j.intermet.2021.107364

    Scopus

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

    Suzuki A., Miyasaka T., Takata N., Kobashi M., Kato M.

    Additive Manufacturing   Vol. 48   2021.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Additive Manufacturing  

    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 α-Al matrix), and tensile properties of L–PBF manufactured AlSi12 alloy samples was investigated. The crystal grain size and fraction of <001> oriented α-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 α-Al phase was surrounded by α-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 α-Al matrix controlled by laser conditions. The STEM/EDS analysis revealed high concentration of solute Si in the α-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 α-Al matrix. These results provide new insights to control mechanical performance of AlSi12 alloy via L–PBF processing parameters.

    DOI: 10.1016/j.addma.2021.102383

    Scopus

  27. Precipitation Hardening at Elevated Temperatures above 400 degrees C and Subsequent Natural Age Hardening of Commercial Al-Si-Cu Alloy Reviewed International journal

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

    MATERIALS   Vol. 14 ( 23 )   2021.12

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Materials  

    The precipitation of intermetallic phases and the associated hardening by artificial aging treatments at elevated temperatures above 400◦ C were systematically investigated in the commer-cially 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)3 Si2 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-Al2 Cu and Q-Al4 Cu2 Mg8 Si6 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.

    DOI: 10.3390/ma14237155

    Web of Science

    Scopus

  28. 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 International journal

    Ibe H., Kato Y., Yamada J., Kato M., Suzuki A., Takata N., Kobashi M.

    Materials and Design   Vol. 210   2021.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier Ltd.  

    In this study, an attempt is made to control the WC-Co two-phase microstructures by laser powder-bed fusion (LPBF) process using cemented carbide powders with different compositions of WC-25Co (mass%) and WC-17Co (mass%) and post heat-treatment at 1380 °C. The as-built cemented carbide samples had different microstructures from those of the cemented carbides fabricated by conventional manufacturing methods. The microstructures of the as-fabricated WC-25Co and WC-17Co cemented carbides were characterized by two types of regions. Region 1 consisted of W2C and W3Co3C phases, including numerous pores and defects. Region 2 consisted of WC and Co phases. Post heat-treatment of the LPBF-built WC-25Co sample at 1380 °C led to the formation of a defect-free WC-Co two-phase microstructure. In contrast, the W3Co3C phase remained in the LPBF-built WC-17Co sample even after heat treatment. The addition of carbon to the WC-17Co powder prevented the formation of the W3Co3C phase in the cemented carbide processed by LPBF and subsequent heat treatments. The addition of carbon to the WC-17Co powder had a slight effect on the hardness of as-fabricated samples, but reduced the hardness of heat-treated samples. The reduced hardness was attributed to the increased volume fractions of the WC and W3Co3C phases.

    DOI: 10.1016/j.matdes.2021.110034

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    Other Link: https://www.sciencedirect.com/science/article/pii/S026412752100589X

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

    Li H., Takata N., Kobashi M., Yoshino M.

    Materials Science and Engineering A   Vol. 824   2021.9

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Materials Science and Engineering A  

    The effects of a trace amount (~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 10−3–102 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 b3 and 66 b3) were almost equivalent to one of the 18Cr base steel (64 b3). 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 b3) 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

    Scopus

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

    Liu X., Suzuki A., Takata N., Kobashi M., Kato M.

    Scripta Materialia   Vol. 202   2021.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Scripta Materialia  

    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 (AB2-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.

    DOI: 10.1016/j.scriptamat.2021.114003

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

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

    Journal of Advanced Joining Processes   Vol. 4   page: 100068   2021.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.jajp.2021.100068

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

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

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

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2464/jilm.71.275

    Other Link: https://www.jstage.jst.go.jp/article/jilm/71/7/71_710701/_article/-char/ja/

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

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

    Materials Science and Engineering: A   Vol. 819 ( 5 ) page: 141459   2021.5

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V  

    DOI: 10.1016/j.msea.2021.141459

  34. Processability and Optimization of Laser Parameters for Densification of Hypereutectic Al–Fe Binary Alloy Manufactured by Laser Powder Bed Fusion Reviewed International journal

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

    crystals   Vol. 11 ( 3 ) page: 320   2021.3

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

    DOI: 10.3390/cryst11030320

  35. 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 International journal

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

    Advanced Engineering Materials     page: 2001284   2021.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:John Wiley & Sons, Inc.  

    DOI: 10.1002/adem.202001284

    DOI: 10.1002/adem.202170017

    Other Link: https://onlinelibrary.wiley.com/doi/10.1002/adem.202170017

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

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

    Materials Science and Engineering: A   Vol. 805   page: 140591   2021.2

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.msea.2020.140591

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

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

    Materials & Design   Vol. 199   page: 109416   2021.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier Ltd.  

    DOI: 10.1016/j.matdes.2020.109416

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

    Suzuki Asuka, Noritake Kazuki, Takata Naoki, Kobashi Makoto

    JOURNAL OF MATERIALS PROCESSING TECHNOLOGY   Vol. 288   2021.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.jmatprotec.2020.116843

    Web of Science

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

    Yunlong Xue, Naoki Takata, Hongmei Li, Makoto Kobashi, LiangYuan

    Materials Science and Engineering: A   Vol. 806 ( 4 ) page: 140861   2021.1

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.msea.2021.140861

  40. Effect of Trace Solute Titanium on Plastic Deformation of α-(Fe, Cr) Single-Crystal Micropillars Fabricated from 18Cr Ferritic Stainless Steel Reviewed International journal

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

    Materials Science and Engineering: A   Vol. 803   page: 140455   2021.1

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.msea.2020.140455

  41. 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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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Trans Tech Publications Ltd  

    DOI: 10.4028/www.scientific.net/MSF.1016.1175

  42. Inhomogeneous Microstructure and its Thermal Stability of AlSi10Mg Lattice Structure Manufactured via Laser Powder Bed Fusion Reviewed International journal

    Mu Lin Liu, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    Materials Science Forum   Vol. 1016   page: 826 - 831   2021.1

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Trans Tech Publications Ltd  

    DOI: 10.4028/www.scientific.net/MSF.1016.826

  43. 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

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

    Journal of the Mechanical Behavior of Biomedical Materials   Vol. 113   page: 104130   2021.1

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

    DOI: 10.1016/j.jmbbm.2020.104130

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

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

    crystals   Vol. 10   page: 1007   2020.11

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

    DOI: 10.3390/cryst10111007

    Other Link: https://www.mdpi.com/2073-4352/10/11/1007

  45. 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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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.intermet.2020.106892

    Web of Science

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

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

    ADDITIVE MANUFACTURING   Vol. 35   page: 101308   2020.10

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

    DOI: 10.1016/j.addma.2020.101308

    Web of Science

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

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

    Intermetallics   Vol. 124   page: 106881   2020.9

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

    DOI: 10.1016/j.intermet.2020.106881

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

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

    MATERIALS   Vol. 13 ( 18 ) page: 3927   2020.9

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

    DOI: 10.3390/ma13183927

    Web of Science

  49. Manufacturing and characterization of in-situ alloyed Ti6Al4V (ELI)-3 at.% Cu by Laser Powder Bed Fusion Reviewed International coauthorship

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

    Additive Manufacturing   Vol. 36   page: 101436   2020.7

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

    DOI: 10.1016/j.addma.2020.101436

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

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

    MATERIALS   Vol. 13 ( 13 ) page: 2902   2020.7

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

    DOI: 10.3390/ma13132902

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    Other Link: https://www.mdpi.com/1996-1944/13/13/2902

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

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

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

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2497/jjspm.67.313

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

    Liu Mulin, Takata Naoki, Suzuki Asuka, Kobashi Makoto

    MATERIALS   Vol. 13 ( 11 ) page: 2487   2020.6

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

    DOI: 10.3390/ma13112487

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

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

    ISIJ INTERNATIONAL   Vol. 60 ( 4 ) page: 774 - 781   2020.4

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

    Hongmei Li, Naoki Takata, Makoto Kobashi, Ai Serizawa

    Journal of Light Metal Welding   Vol. 58 ( Supplement ) page: 102 - 106   2020.3

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

    DOI: 10.11283/jlwa.58.102s

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

    Li Hongmei, Takata Naoki, Kobashi Makoto, Serizawa Ai

    MATERIALS   Vol. 13 ( 5 ) page: 1238   2020.3

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

    DOI: 10.3390/ma13051238

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    Other Link: https://www.mdpi.com/1996-1944/13/5/1238

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

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

    Additive Manufacturing   Vol. 33   page: 101152   2020.2

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.addma.2020.101152

  57. Influence of Brazing Time on Liquid Migration and Cell Structure of Porous Aluminum Invited Reviewed

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

    MATERIALS TRANSACTIONS   Vol. 61 ( 2 ) page: 368 - 374   2020.2

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

    DOI: 10.2320/matertrans.MT-M2019237

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  58. 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   page: 116388   2020.2

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

    DOI: 10.1016/j.jmatprotec.2019.116388

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  59. 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

    Asuka Suzuki, Naoki Kosugi, Naoki Takata, Makoto Kobashi

    Materials Science and Engineering: A   Vol. 776 ( 3 ) page: 139000   2020.1

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

    DOI: 10.1016/j.msea.2020.139000

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

    Liu Mulin, Takata Naoki, Suzuki Asuka, Kobashi Makoto

    JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY   Vol. 36   page: 106 - 117   2020.1

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

    DOI: 10.1016/j.jmst.2019.06.015

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

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

    Materials Science & Engineering A   Vol. 772 ( 20 ) page: 138710   2020.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.msea.2019.138710

  62. oward Understanding the Mechanism behind Microstructure Development of Aluminum Alloy Powders Additively Manufactured by Selective Laser Melting Invited Reviewed

    Naoki TAKATA, Kai OIDE, Takaya KOBAYASHI, Asuka SUZUKI, Makoto KOBASHI

    J. Jpn. Soc. Powder Powder Metallurgy   Vol. 66 ( 12 ) page: 573-580   2019.12

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    Authorship:Lead author   Language:Japanese  

    DOI: https://doi.org/10.2497/jjspm.66.573

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

    Vilardell A. M., 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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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.msea.2019.138330

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  64. Development of anomalous microstructure in aluminum alloy parts produced by selective laser melting technologies Invited Reviewed

    Naoki Takata, Asuka Suzuki, Makoto Kobashi

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

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    Authorship:Lead author   Language:Japanese  

    DOI: 10.11279/jfes.91.612

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

    Li Hongmei, Takata Naoki, Kobashi Makoto, Serizawa Ai

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   Vol. 764 ( 9 ) page: 138247   2019.8

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    DOI: 10.1016/j.msea.2019.138247

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

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

    Advanced Engineering Materials     page: 1900571   2019.7

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

    DOI: 10.1002/adem.201900571

  67. 「高機能溶融亜鉛めっき皮膜創成に向けた基礎研究と応用技術」特集号の発刊に寄せて

    高田 尚記,貝沼 亮介

    鉄と鋼   Vol. 105 ( 7 ) page: 675   2019.7

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2355/tetsutohagane.105.675

  68. Synthesis and structural control of Fe-based porous layer on Fe substratefor joining with resin parts using combustion reaction Reviewed

    Asuka Suzuki, Kazuki Noritake, Naoki Takata, Makoto Kobashi

      Vol. 30   page: 2101-2109   2019.7

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

    DOI: 10.1016/j.apt.2019.06.024

  69. Enhanced Interfacial Reaction of Fe-Si Alloy Sheets Hot-Dipped in Zn melt at 460 degrees C Reviewed

    Takata Naoki, Hayano Kunihisa, Suzuki Asuka, Kobash Makoto

    TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN   Vol. 105 ( 7 ) page: 693-700   2019.7

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    DOI: 10.2355/tetsutohagane.TETSU-2018-147

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  70. Formation of Fe2Al5 Phase Layer on Fe-Si Alloy Sheets Hot-Dipped in Zn-0.2Al Alloy Melt Reviewed

    Takata Naoki, Hayano Kunihisa, Suzuk Asuka, Kobashi Makoto

    TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN   Vol. 105 ( 7 ) page: 701-708   2019.7

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

    DOI: 10.2355/tetsutohagane.TETSU-2018-146

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  71. Formation sequence of Fe-Al intermetallic phases at interface between solid Fe and liquid Zn-6Al-3Mg alloy Reviewed

    Yokoi Hiroki, Takata Naoki, Suzuki Asuka, Kobashi Makoto

    INTERMETALLICS   Vol. 109   page: 74-84   2019.6

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    DOI: 10.1016/j.intermet.2019.03.011

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

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

    Additive Manufacturing   Vol. 28   page: 160-168   2019.5

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    DOI: 10.1016/j.addma.2019.04.018

  73. 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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    DOI: 10.14957/fgms.33.38

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

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

    Journal of Materials Processing Technology   Vol. 270   page: 1-7   2019.2

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    DOI: 10.1016/j.jmatprotec.2019.02.012

  75. 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 Reviewed

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

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

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

    DOI: 10.2464/jilm.69.93

  76. Transmission electron microscopic observation of layered double hydroxide films formed on aluminum alloys prepared by steam coating process Reviewed

    Takata N.

    Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan   Vol. 105 ( 2 ) page: 177 - 182   2019.2

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan  

    DOI: 10.2355/tetsutohagane.TETSU-2018-064

    Scopus

  77. 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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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.msea.2018.10.034

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

    Yunmao Shua, Asuka Suzuki, Naoki Takata, Makoto Kobashi

    Journal of Materials Processing Technology   Vol. 264   page: 182-189   2019.1

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    DOI: 10.1016/j.jmatprotec.2018.09.010

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

    DOI: 10.1016/j.jallcom.2018.08.211

  80. Microstructure and Mechanical property o f Porous Nickel aluminides Fabricated by Reactive Synthesis with Space Holder Powder Reviewed

    Shu Yunmao, Suzuki Asuka, Takata Naoki, Kobashi Makoto

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

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    DOI: 10.1557/adv.2019.153

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

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

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

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    DOI: 10.1557/adv.2019.107

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  82. Effect of boron addition on liquid zinc embrittlement of heat affected zone in 490 MPa grade steels

    Yamamoto M.

    Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan   Vol. 105 ( 7 ) page: 742 - 751   2019

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    DOI: 10.2355/tetsutohagane.TETSU-2018-150

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  83. Toward understanding the mechanism behind microstructure development of aluminum alloy powders additively manufactured by selective laser melting Invited Reviewed

    Takata N.

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy   Vol. 66 ( 12 ) page: 573 - 580   2019

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy  

    DOI: 10.2497/jjspm.66.573

    Scopus

  84. 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   2018.8

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

    DOI: 10.1016/j.matdes.2018.08.005

  85. Crystallographic Features of Microstructure in Maraging Steel Fabricated by Selective Laser Melting

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

    METALS   Vol. 8 ( 6 )   2018.6

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    DOI: 10.3390/met8060440

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  86. 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   2018.5

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    DOI: 10.1016/j.jmatprotec.2018.06.010

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  87. 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

  88. 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 η-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 α-Al (fcc) phase reinforced with high fractions (>50%) of the η and T phases. Both alloys exhibited fine two-phase eutectic microstructures consisting of α/η and α/T phases, respectively. The morphology of the α-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 °C. In addition, the size and spacing of the α-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 °C

    DOI: 10.1016/j.intermet.2018.01.018

  89. 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 Tech.   Vol. 254   page: 338-345   2018.1

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    DOI: 10.1016/j.jmatprotec.2017.10.054

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

    Naoki Takata⁠, Hirohisa Kodaira⁠, Asuka Suzuki, Makoto Kobashi

    Materials Characterization     page: in press   2018

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

    DOI: 10.1016/j.matchar.2017.11.052

  91. Enhanced Interfacial Reaction of Fe-Si Alloy Sheets Hot-Dipped in Zn Melt at 460 degrees C Reviewed

    Takata Naoki, Hayano Kunihisa, Suzuki Asuka, Kobashi Makoto

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

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    DOI: 10.2355/isijinternational.ISIJINT-2018-036

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  92. Microstructure and mechanical properties of Al-10Si-0.4Mg alloy fabricated by selective laser melting Reviewed

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

    Journal of The Japan Institue of Light Metals   Vol. 67 ( 11 ) page: 582-588   2017.11

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    DOI: 10.2464/jilm.67.582

  93. Reactive processing of aluminum matrix composites Invited Reviewed

    Makoto Kobashi, Naoki Takata, Asuka Suzuki

    Journal of The Japan Institue of Light Metals   Vol. 67 ( 11 ) page: 571-575   2017.11

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    DOI: 10.2464/jilm.67.571

  94. 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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  95. 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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  96. Synthesis of Porous Fe/TiB2 Composites by Means of Combustion Synthesis Reaction Reviewed

    Shun Ito, Naoki Takata, Makoto Kobashi

    Journal of the Japan Society of Powder and Powder Metallurgy   Vol. 64 ( 6 ) page: 288-294   2017.7

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    Porous metals show some unique properties, which bulk metals cannot exhibit. Especially, iron-based porous metals are expected to be applied to structural components because of their high strength, high rigidity, low material cost and so on. In this research, we synthesized porous Fe/TiB2 composites by Fe-Ti-B combustion reaction. Iron, titanium and boron powders were blended to synthesize 30 to 60vol%TiB2 particles in Fe matrix after the combustion synthesis reaction. Four kinds of iron powders (powder size: < 53 μm, < 150 μm, 600 μm and 850-1000 μm) were used. The blended powder was heated to induce the combustion synthesis reaction. When < 53 μm and < 150 μm iron powders were used, irregular shaped and open pores were formed. On the other hand, when 600 μm and 850-1000 μm iron powders were used, spherical pores whose sizes and shapes were similar to those of iron powders were formed

    DOI: http://doi.org/10.2497/jjspm.64.288

  97. 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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  98. Synthesis of porous Fe/TiB<inf>2</inf> composites by means of combustion synthesis reaction Reviewed

    Ito S.

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy   Vol. 64 ( 6 ) page: 288 - 294   2017.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy  

    DOI: 10.2497/jjspm.64.288

    Scopus

  99. 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   2017.1

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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 μm) and Al (particle size: <45 μm) were mixed to various total compositions of Ti–0-40 Al (at.%), and NaCl (particle size: 300-400 μm) was mixed with the Ti/Al powder to give a highly porous structure. The mixed powder was sintered at 700 oC 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–Al 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 °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 Ti3Al single-phase would be an effective method to achieve high energy absorption capacity of the porous Ti–Al alloy.

    DOI: 10.1557/adv.2017.123

  100. Solid Fe/Liquid Zn Interfacial Reaction of Hot-Dip Galvanized Dual-Phase Steels Reviewed

    Naoki Takata, Makoto Kobashi, Masao Takeyama

    Proceedings of the 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9)     page: 496-501   2016.8

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  101. Solidification of Bcc/T1/T2 three-phase microstructure in Mo–Nb–Si–B alloys Reviewed

    N. Takata, N. Sekido, M. Takeyama, J.H. Perepezko, M. Follett-Figueroa, C. Zhang

    Intermetallics   Vol. 72   page: 1-8   2016.5

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    The three-phase, (Mo,Nb)ss/(Mo,Nb)5Si3/(Mo,Nb)5SiB2, Bcc/T1/T2 microstructures that develop in Mo–Nb–Si–B alloys have been examined in arc cast and directionally solidified samples to identify the phase sequencing during solidification. A Mo-32.6Nb-19.5Si-4.7B (at.%) alloy was directionally solidified using an optical floating zone (OFZ) furnace in a flowing Ar gas atmosphere at a constant growth rate of 10 mm/h. The microstructure of the directionally solidified alloy is characterized by an elongated T2 phase surrounded by bcc and T1 phases with an interwoven morphology From the evaluation of the microstructures in arc cast ingots of several alloys at a constant 32.6 at%Nb composition, the path of the liquidus valleys with decreasing temperature has been determined to intersect at a common point that establishes the solidification reaction as a eutectic. The incorporation of the experimental results into a computational thermodynamic analysis provides insight on the partitioning of components within each phase during solidification

    DOI: doi:10.1016/j.intermet.2016.01.001

  102. Mechanical properties of austenitic heat-resistant Fe–20Cr–30Ni–2Nb steel at ambient temperature Reviewed

    Naoya Kanno, Kazuhiro Yoshimura, Naoki Takata, Imanuel Tarigan, Masao Takeyama

    Materials Science and Engineering A   Vol. 662   page: 551–563   2016.4

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

    DOI: http://dx.doi.org/10.1016/j.msea.2016.03.038

  103. Nanoindentation study on solid solution softening of Fe-rich Fe2Nb Laves phase by Ni in Fe-Nb-Ni ternary alloys Reviewed

    Naoki Takata, Hassan Ghassemi-Armaki, Masao Takeyama, Sharvan Kumar

    Intermetallics   Vol. 70   page: 7-16   2016.3

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    DOI: 10.1016/j.intermet.2015.11.003

  104. Microstructure Control of Dual-Phase Steels through Hot-Dip Al–Mg–Si Alloy Coating Process Reviewed

    Naoki Takata, Tadashi Tsukahara, Satoru Kobayashi, Masao Takeyama

    ISIJ International   Vol. 56 ( 2 ) page: 319–325   2016.2

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    DOI: 10.2355/isijinternational.ISIJINT-2015-441

  105. Mechanical Properties of Fe2Al5 and FeAl3 Intermetallic Phases at Ambient Temperature Reviewed

    Tadashi Tsukahara, Naoki Takata, Satoru Kobayashi, Masao Takeyama

    Tetsu-to-Hagané   Vol. 102 ( 2 ) page: 89-95   2016.2

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    DOI: 10.2355/tetsutohagane.TETSU-2015-063

  106. Crystallography of Fe2Al5 phase at the interface between solid Fe and liquid Al Reviewed

    Takata Naoki, Nishimoto Manamu, Kobayashi Satoru, Takeyama Masao

    INTERMETALLICS   Vol. 67   page: 1-11   2015.12

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    DOI: 10.1016/j.intermet.2015.07.011

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  107. Growth of Fe2Al5 Phase on Pure Iron Hot-Dipped in Al-Mg-Si Alloy Melt with Fe in Solution Reviewed

    Takata Naoki, Nishimoto Manamu, Kobayashi Satoru, Takeyama Masao

    ISIJ INTERNATIONAL   Vol. 55 ( 7 ) page: 1454-1459   2015.7

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    DOI: 10.2355/isijinternational.55.1454

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  108. Tensile Properties of Austentiic Heat Resisntat Steel of Fe-20Cr-30Ni-2Nb at Ambient Temperature Reviewed

    Naoki Takata, Naoya Kanno, Masao Takeyama

    Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015)     page: 169-172   2015.6

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  109. 3D Observation of Grain Boundary Precipitation of Fe2Nb Laves Phase in a Novel Austenitic Heat Resistant Steel Fe-20Cr-35Ni-2.5Nb Reviewed

    Fagang Gao, Naoki Takata, Satoru Kobayashi, Masao Takeyama

    Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015)     page: 35-38   2015.6

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  110. Stability of Sigma Phase at Elevaed Temperatures in Mn Added Fe-Cr-Ni Austenitic Heat Resistant Steels Reviewed

    Yoshiki Kumagai, Naoki Takata, Satoru Kobayashi, Masao Takeyama

    Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015)     page: 157-160   2015.6

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  111. Creep of Super Advanced Fe-Cr-Ni-Nb Austenitic Heat Resistant Steels at 1073 K for A-USC Power Plant Reviewed

    Shion Mise, Taro Osaka,Takahiro Kimura, Naoki Takata, Satoru Kobayashi, Masao Takeyama

    Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015)     page: 165-168   2015.6

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  112. Microstructural Characterization of Gamma Prime Precipitates in Wrought Ni-Based Superalloy Inconel X-750 Reviewed

    Hiromu Hisazawa, Yoshihiro Terada, Naoki Takata, Masao Takeyama

    Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015)     page: 250-253   2015.6

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  113. Effect of Ti Addition on the Formation of Fe2Nb (TCP) and Ni3Nb (GCP) Phases in Fe-20Cr-35Ni-2.5Nb Austenitic Heat Resistant Steel at 1073 K Reviewed

    Hongmei Li, Fagang Gao, Naoki Takata, Satoru Kobayashi, Masao Takeyama

    Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015)     page: 161-164   2015.6

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  114. In-Situ Tensile Observation at 1073 K in Laves Phase Strengthened Fe-20Cr-30Ni-2Nb Steels Reviewed

    Mari Yoshihara, Naoki Takata, Masao Takeyama

    Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015)     page: 153-156   2015.6

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  115. Ultrafine ferrite formation through cold-rolling and annealing of low-carbon dual-phase steel Reviewed

    Yoshitaka Okitsu, Naoki Takata, Nobuhiro Tsuji

    Journal of Materials Science & Technology   Vol. 31   page: 745-754   2015.3

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  116. Crystallography of Bcc/T1/T2 Three-Phase Microstructure in the Directionally Solidified Mo-Nb-Si-B Alloy Reviewed

    Mater. Res. Soc. Symp. Proc.   Vol. 1760   page: mrsf14-1760-yy03-03   2015.3

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    DOI: DOI: 10.1557/opl.201 .

  117. Morphology and formation of Fe-Al intermetallic layers on iron hot-dipped in Al-Mg-Si alloy melt Reviewed

    Takata Naoki, Nishimoto Manamu, Kobayashi Satoru, Takeyama Masao

    INTERMETALLICS   Vol. 54   page: 136-142   2014.11

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    DOI: 10.1016/j.intermet.2014.06.003

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  118. 6111アルミニウム合金のリジング発生に及ぼす加工熱処理の影響とCube方位粒形成過程 Reviewed

    池田賢一,宮田幸昌,吉原隆浩,高田尚記,中島英治

    軽金属   Vol. 64 ( 8 ) page: 353-360   2014.8

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  119. Effect of Grain Boundary Fe2Nb Laves Phase on Creep of Austenitic Heat Resistant Steel of Fe-20Cr-30Ni-2Nb in Steam Atmosphere Reviewed

    Misosaku Yu, Tarigan Imanuel, Kimura Takahiro, Takata Naoki, Ueda Mitsutoshi, Maruyama Toshio, Takeyama Masao

    Tetsu-to-Hagane   Vol. 100 ( 9 ) page: 1158-1164   2014

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    Creep of carbon free Fe-20Cr-30Ni-2Nb (at.%) steels strengthened by Fe2Nb Laves phase on grain boundaries has been examined in air and steam atmospheres at 1073 K/70 MPa. Sufficiently covering grain boundaries by stable Laves phase can reduce the creep rate, resulting in a significant extension of the creep rupture life without a loss of creep ductility in steam atmosphere as well as air. This effect becomes remarkable in higher area fractions of Laves phase on grain boundaries (ρ) than 80%. The creep rupture strain slightly decrease by steam atmosphere, which would be associated with the interglanular oxidation and its related cracks propagation along grain boundaries enhanced by steam atmosphere in the creep acceleration stage. Its effect can be suppressed by covering grain boundaries by Laves phase (increasing ρ). Therefore, Grain Boundary Precipitation Strengthening by stable Laves phase is a key mechanism for use of materials for boiler tubes in the innovative advanced ultra-super critical (A-USC) thermal power plants to be operated above 973 K.

  120. Effect of Steel Microstructure on Solid Fe/Liquid Zn Interface Reaction in Hot-dipped Zn Galvanized Steels Reviewed

    Takata Naoki, Takeyama Masao

    Tetsu-to-Hagane   Vol. 100 ( 9 ) page: 1172-1179   2014

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    We have examined the growth kinetics of Fe-Zn intermetallics layers formed on Fe-1.5Mn (α-Fe single phase) and Fe-3.5Mn-0.1C (γ-Fe+α-Fe two phase) steel sheets dipped in pure Zn melt at 460 ºC. In an early stage of dipping, FeZn13-ζ phase layer is initially formed and its thickness slightly increases with increasing dipping time till about 10 s, and then all Fe-Zn intermetallics layers (ζ, δ1, Γ) grow following a parabolic law. The growth kinetics can be recognized in both steels. This result demonstrates a slight effect of steel microstructure on the formation of Fe-Zn intermetallics layers. The composition analysis revealed a significant Fe dissolution into pure Zn melt in an early stage of dipping. The supersaturated Fe in Zn melt would provide the driving force for the crystallization of ζ phase layer on steel sheets. The continuous layer of ζ phase would control Fe diffusion for the following growth of the other Fe-Zn intermetallics layers.

  121. CREEP OF THE NOVEL AUSTENITIC HEAT RESISTANT STEEL OF FE-20CR-30NI-2NB UNDER STEAM ATMOSPHERE AT 1073 K Reviewed

    Yu Misosaku, Imanuel Tarigan, Naoki Takata, Mitsutoshi Ueda, Toshio Maruyama, Masao Takeyama

    Advances in Materials Technology for Fossil Power Plants (Proceedings from 8th International Conference, October 22-25, 2013, Waikoloa, Hawaii, USA)     page: 1352-1362   2013.10

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  122. Plastic deformation of the C14 Laves phase (Fe,Ni)(2)Nb Reviewed

    Takata N., Armaki H. Ghassemi, Terada Y., Takeyama M., Kumar K. S.

    SCRIPTA MATERIALIA   Vol. 68 ( 8 ) page: 615-618   2013.4

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    DOI: 10.1016/j.scriptamat.2012.12.019

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  123. Effect of Dislocation Sources on Slip in Fe2Nb Laves Phase with Ni in Solution Reviewed

    N. Takata, H. Ghassemi Armaki, Y. Terada, M. Takeyama, K. S. Kumar

    Mater. Res. Soc. Symp. Proc.   Vol. 1516   page: 269-274   2012.12

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    DOI: DOI: 10.1557/opl.2012.

  124. Dynamic deformation behavior of ultrafine-grained iron produced by ultrahigh strain deformation and annealing Reviewed

    Okitsu Yoshitaka, Takata Naoki, Tsuji Nobuhiro

    SCRIPTA MATERIALIA   Vol. 64 ( 9 ) page: 896-899   2011.5

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    DOI: 10.1016/j.scriptamat.2011.01.026

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  125. Susceptibility to Hydrogen Embrittlement of IF Steel with Ultrafine-Grained Structure Produced by Accumulative Roll-Bonding Process Reviewed

    Materials Science Forum   Vol. 654-656   page: 1235-1238   2010.8

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  126. Analysis of deformation behaviors of ultrafine grained Cu-30%Zn with bimodal grain-size distribution Reviewed

    Morimitsu Takatoshi, Takata Naoki, Terada Daisuke, Tsuji Nobuhiro

    15TH INTERNATIONAL CONFERENCE ON THE STRENGTH OF MATERIALS (ICSMA-15)   Vol. 240   2010

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    DOI: 10.1088/1742-6596/240/1/012015

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  127. Ultrafine grained copper alloy sheets having both high strength and high electric conductivity Reviewed

    Takata Naoki, Lee Seong-Hee, Tsuji Nobuhiro

    MATERIALS LETTERS   Vol. 63 ( 21 ) page: 1757-1760   2009.8

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    DOI: 10.1016/j.matlet.2009.05.021

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  128. Increasing the ductility of ultrafine-grained copper alloy by introducing fine precipitates Reviewed

    Takata Naoki, Ohtake Yusuke, Kita Kazuhisa, Kitagawa Kazuo, Tsuji Nobuhiro

    SCRIPTA MATERIALIA   Vol. 60 ( 7 ) page: 590-593   2009.4

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    DOI: 10.1016/j.scriptamat.2008.12.018

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  129. Grain Boundary Structures of Severe Plastic Deformed Copper Reviewed

      Vol. 14 ( 1 ) page: .   2009.1

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  130. A new route to fabricate ultrafine-grained structures in carbon steels without severe plastic deformation Reviewed

    Okitsu Yoshitaka, Takata Naoki, Tsuji Nobuhiro

    SCRIPTA MATERIALIA   Vol. 60 ( 2 ) page: 76-79   2009.1

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    DOI: 10.1016/j.scriptamat.2008.09.002

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  131. Temperature and Strain Rate Dependence of Flow Stress in Severely Deformed Copper by Accumulative Roll Bonding Reviewed

    Kunimine Takahiro, Takata Naoki, Tsuji Nobuhiro, Fujii Toshiyuki, Kato Masaharu, Onaka Susumu

    MATERIALS TRANSACTIONS   Vol. 50 ( 1 ) page: 64-69   2009.1

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    DOI: 10.2320/matertrans.MD200809

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  132. Transmission Electron Microscopy of Fe(2)Nb Laves Phase With C14 Structure in Fe-Nb-Ni Alloys Reviewed

    Takata Naoki, Ishikawa Shigehiro, Matsuo Takashi, Takeyama Masao

    ADVANCED INTERMETALLIC-BASED ALLOYS FOR EXTREME ENVIRONMENT AND ENERGY APPLICATIONS   Vol. 1128   page: 475-480   2009

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  133. 遷移金属Laves相の構造と相安定性

    石川茂浩, 高田尚記, 松尾孝, 竹山雅夫

    (独)日本学術振興会 耐熱金属材料第123委員会研究報告   Vol. 50 ( 3 ) page: 347-360   2009

  134. Fe2Nb Laves相の構造とそのオーステナイト系耐熱鋼の強化相としての役割

    高田尚記, 松尾 孝, 竹山雅夫

    (独)日本学術振興会 耐熱金属材料第123委員会研究報告   Vol. 50 ( 3 ) page: 389-400   2009

  135. Structure of Fe2Nb Laves Phase and Its Role as Strengthener in Austenitic Heat Resistance Steels

    Naoki Takata, TAKASHI MATSUO, MASAO TAKEYAMA

    Report of the 123rd Committee on Heat-Resisting Materials and Alloys, Japan Society for the Promotion of Science   Vol. 50 ( 3 ) page: 389-400   2009

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  136. Structure and Phase Stability of Transition Metal Laves Phase

    Shigehiro Ishikawa, Naoki Takata, TAKASHI MATSUO, MASAO TAKEYAMA

    Report of the 123rd Committee on Heat-Resisting Materials and Alloys, Japan Society for Promotion of Science   Vol. 50 ( 3 ) page: 347-360   2009

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  137. Mechanical properties of ultrafine grained ferritic steel sheets fabricated by rolling and annealing of duplex microstructure Reviewed

    Okitsu Yoshitaka, Takata Naoki, Tsuji Nobuhiro

    JOURNAL OF MATERIALS SCIENCE   Vol. 43 ( 23-24 ) page: 7391-7396   2008.12

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    DOI: 10.1007/s10853-008-2971-9

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  138. Dynamic deformation behavior of ultrafine grained aluminum produced by ARB and subsequent annealing Reviewed

    Takata Naoki, Okitsu Yoshitaka, Tsuji Nobuhiro

    JOURNAL OF MATERIALS SCIENCE   Vol. 43 ( 23-24 ) page: 7385-7390   2008.12

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    DOI: 10.1007/s10853-008-2972-8

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  139. 学位取得後の2年間 Invited

    高田 尚記

    まてりあ : 日本金属学会会報   Vol. 47 ( 6 ) page: .   2008.6

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  140. Microstructural Analysis of Polycrystalline Silicon Thin Films Formation Behavior during Aluminum Induced Crystallization Reviewed

    IKEDA Ken-ichi, HIROTA Takeshi, FUJIMOTO Kensuke, SUGIMOTO Youhei, TAKATA Naoki, Ii Seiichiro, NAKASHIMA Hideharu, NAKASHIMA Hiroshi

    Technical report of IEICE. SDM   Vol. 108 ( 1 ) page: 95-100   2008.4

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    The formation behavior of polycrystalline silicon thin films during the aluminum induced crystallization (AIC) was investigated by in-situ heating transmission electron microscopy (TEM). The electron dispersive X-ray spectroscopy (EDS) analysis of annealed sample was showed that layer exchange of the a-Si/Al film is occurred during the annealing. Furthermore, from the in-situ heating TEM observation and EDS analysis of as-deposited sample, it was confirmed the co-existence of Si and Al in a-Si/Al film. The mechanism of AIC and layer exchange were discussed from the experimental results and the phase diagram of Al-Si system.

  141. Direct evidence of polycrystalline silicon thin films formation during aluminum induced crystallization by in-situ heating TEM observation Reviewed

    Ii Seiichiro, Hirota Takeshi, Fujimoto Kensuke, Sugimoto Youhei, Takata Naoki, Ikeda Ken-ichi, Nakashima Hideharu, Nakashima Hiroshi

    MATERIALS TRANSACTIONS   Vol. 49 ( 4 ) page: 723-727   2008.4

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    DOI: 10.2320/matertrans.MRA20073121

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  142. Grain boundary structure of ultrafine grained pure copper fabricated by accumulative roll bonding Reviewed

    Ikeda Ken-ichi, Yamada Kousuke, Takata Naoki, Yoshida Fuyuki, Nakashima Hideharu, Tsuji Nobuhiro

    MATERIALS TRANSACTIONS   Vol. 49 ( 1 ) page: 24-30   2008.1

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    DOI: 10.2320/matertrans.ME200715

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  143. Grain boundary structures of ARB processed aluminum Reviewed

    Ii Seiichiro, Hishida Motoki, Takata Naoki, Ikeda Ken-ichi, Nakashima Hideharu, Tsuji Nobuhiro

    NANOMATERIALS BY SEVERE PLASTIC DEFORMATION IV, PTS 1 AND 2   Vol. 584-586   page: 716-721   2008

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  144. Grain Boundary Structure of Ultrafine Grained Pure Copper Fabricated by Accumulative Roll Bonding

    Ken-ichi Ikeda, Kousuke Yamada, Naoki Takata, Fuyuki Yoshida, Hideharu Nakashima and Nobuhiro Tsuji

    Materials Transactions   Vol. 49 ( 1 ) page: 24-30   2008

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  145. Direct Evidence of Polycrystalline Silicon Thin Films Formation during Aluminum Induced Crystallization by In-Situ Heating TEM Observation

    Seiichiro Ii, Takeshi Hirota, Kensuke Fujimoto, Youhei Sugimoto, Naoki Takata, Ken-ichi Ikeda, Hideharu Nakashima and Hiroshi Nakashima

    Materials Transactions   Vol. 49 ( 4 ) page: 723-727   2008

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  146. Managing Both Strength and Ductility in Ultrafine Grained Steels

    Nobuhiro Tsuji, Naoya Kamikawa, Rintaro Ueji, Naoki Takata, Hirohumi Koyama, Daisuke Terada

    ISIJ International   Vol. 48 ( 8 ) page: 1114-1121   2008

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    DOI: 10.2355/isijinternational.48.1114

  147. In-situ heating SEM/EBSD analysis of recrystallization behavior in pure aluminum foils

    Report of the Center of Advanced Instrumental Analysis,Kyushu University   ( 26 ) page: 8-14   2008

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  148. Structure and mechanical properties of severely deformed Cu-Cr-Zr alloys produced by accumulative roll-bonding process Reviewed

    Kitagawa K., Akita T., Kita K., Gotoh M., Takata N., Tsuji N.

    NANOMATERIALS BY SEVERE PLASTIC DEFORMATION IV, PTS 1 AND 2   Vol. 584-586   page: 791-796   2008

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  149. Nanostructured bulk copper fabricated by accumulative roll bonding Reviewed

    Takata Naoki, Lee Seong-Hee, Lim Cha-Yong, Kim Sang-Shik, Tsuji Nobuhiro

    JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY   Vol. 7 ( 11 ) page: 3985-3989   2007.11

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    DOI: 10.1166/jnn.2007.073

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  150. The formation process of cube oriented grains in 6000 aluminum alloy

    MIYATA Yukimasa, YOSHIHARA Takahiro, TAKATA Naoki, IKEDA Ken-ichi, HATA Satoshi, NAKASHIMA Hideharu

      Vol. 113   page: 45-46   2007.10

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  151. Change in microstructure and texture during annealing of pure copper heavily deformed by accumulative roll bonding Reviewed

    Takata Naoki, Yamada Kousuke, Ikeda Ken-ichi, Yoshida Fuyuki, Nakashima Hideharu, Tsuji Nobuhiro

    MATERIALS TRANSACTIONS   Vol. 48 ( 8 ) page: 2043-2048   2007.8

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  152. Effects of thermo-mechanical treatment on the formation of cube-oriented grains in 6000 aluminum alloy

    MIYATA Yukimasa, YOSHIHARA Takahiro, NAKATA Naoki, IKEDA Ken-ichi, NAKASHIMA Hideharu

      Vol. 112   page: 199-200   2007.4

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  153. Analysis of recrystallization process of pure aluminum foil by in-situ heating EBSP technique

    IKEDA Ken-ichi, TAKATA Naoki, MIYATA Yukimasa, NAKASHIMA Hideharu

      Vol. 112   page: 63-64   2007.4

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  154. In-Situ Heating Observation for Formation Behavior of Polycrystalline Silicon Thin Films Fabricated Using Aluminum Induced Crystallization Reviewed

    IKEDA Ken-ichi, HIROTA Takeshi, FUJIMOTO Kensuke, SUGIMOTO Youhei, TAKATA Naoki, II Seiichiro, NAKASHIMA Hideharu, NAKASHIMA Hiroshi

      Vol. 71 ( 2 ) page: 158-163   2007.2

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  155. In-situ heating observation for formation behavior of polycrystalline silicon thin films fabricated using aluminum induced crystallization Reviewed

    Ikeda Ken-ichi, Hirota Takeshi, Fujimoto Kensuke, Sugimoto Youhei, Takata Naoki, Ii Seiichiro, Nakashima Hideharu, Nakashima Hiroshi

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   Vol. 71 ( 2 ) page: 158-163   2007.2

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  156. In-situ EBSP analysis of grain boundary migration during recrystallization in pure aluminum foils Reviewed

    Takata Naoki, Ikeda Ken-ichi, Nakashima Hideharu, Tsuji Nobuhiro

    Recrystallization and Grain Growth III, Pts 1 and 2   Vol. 558-559   page: 351-356   2007

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  157. ARB法により強ひずみ加工したCu-Cr-Zr合金の組織と機械的特性

    大竹祐輔,北川和夫,北 和久,高田 尚記,辻 伸泰,青木庄治

    銅と銅合金   Vol. 46 ( 1 ) page: 142-147   2007

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  158. アルミニウム誘起結晶化法による多結晶シリコン薄膜形成挙動のその場加熱観察

    池 田 賢 一, 高 田 尚 記, 廣 田 健, 井 誠一郎, 杉 本 陽 平, 中 島 英 治, 中 島 寛

    日本金属学会誌   Vol. 71 ( 2 ) page: 158-163   2007

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  159. Relation between ridging and texture components in Al-Mg-Si alloy Reviewed

    Ikeda Ken-ichi, Yoshihara Takahiro, Takata Naoki, Nakashima Hideharu

    RECRYSTALLIZATION AND GRAIN GROWTH III, PTS 1 AND 2   Vol. 558-559   page: 71-76   2007

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  160. In-situ Heating Observation of Formation Process of Polycrystalline Si Using Aluminum Induced Crystallization

    IKEDA Ken-ichi, NAKASHIMA Hideharu, HIROTA Takeshi, FUJIMOTO Kensuke, SUGIMOTO Youhei, TAKATA Naoki, II Seiichiro, NAKASHIMA Hiroshi

      Vol. 45 ( 12 ) page: .   2006.12

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  161. Relation between ridging and texture in 6111 aluminum alloy

    IKEDA Ken-ichi, YOSHIHARA Takahiro, TAKATA Naoki, NAKASHIMA Hideharu

      Vol. 110   page: 207-208   2006.4

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  162. Formation Process of Polycrystalline Si Thin Film Using Al-Induced Crystallization Reviewed

    IKEDA Ken-ichi, HIROTA Takeshi, FUJIMOTO Kensuke, SUGIMOTO Youhei, TAKATA Naoki, Ii Seiichiro, NAKASHIMA Hideharu, NAKASHIMA Hiroshi

    Technical report of IEICE. OME   Vol. 106 ( 7 ) page: 13-17   2006.4

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    Polycrystalline silicon (poly-Si) thin films with various amorphous Si (a-Si)/Aluminum (Al) thickness ratio have been prepared by Al-induced crystallization (AIC). In order to investigate the formation process of poly-Si thin film produced by AIC, the crystal orientation analysis by SEM/EBSP method and in-situ TEM observation were carried out. It was found that the a-Si/Al thickness ratio of about 1:1 is suitable to achieve a flat surface of poly-Si. Furthermore, in-situ TEM observation shows that Si is crystallized through the non-equilibrium a-Si/Al solid solution.

  163. Annealing behavior and recrystallized texture in ARB processed copper Reviewed

    Takata N, Yamada K, Ikeda K, Yoshida F, Nakashima H, Tsuji N

    NANOMATERIALS BY SEVERE PLASTIC DEFORMATION   Vol. 503-504   page: 919-924   2006

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    Web of Science

  164. Atomic Structure and Electronic State of <110> Symmetric Tilt Boundaries in Palladium Reviewed

    MIZUGUCHI Takashi, TAKATA Naoki, IKEDA Ken-ichi, NAKASHIMA Hideharu

    The Journal of the Japan Institute of Metals.A   Vol. 69 ( 11 ) page: 1010-1015   2005.11

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      In this study, the energy and atomic structure of the <110> symmetric tilt boundaries in palladium were calculated using a molecular dynamics (MD) method and the electronic structures of hydrogen in the bulk and at the grain boundaries were calculated using discrete-variational Xα (DV-Xα) molecular orbital cluster calculaion by solving Hartree-Fock-Slater equation.    The result of MD simulation revealed that the energy of the <110> symmetric tilt boundary of palladium depended on the misorientation angle and that there were large energy cusps at the misorientation angles which correspond to the {111}Σ3 and {113}Σ11 symmetric tilt boundaries. The atomic structure of all <110> symmetric tilt boundaries could consist of the combination of the {331} Σ19, {111}Σ3 and {113}Σ11 structural units and {110}Σ1 and {001}Σ1 single crystal units.    The result of DV-Xα molecular orbital cluster calculation showed that the interstitial hydrogen atoms induced the palladium-hydrogen chemical bond which had a different energy level from the palladium-palladium bond. The component of the palladium-hydrogen bond at the grain boundaries was similar to those in the bulk palladium. It is clarified that electronic structure near the grain boundary is different from that in the perfect crystal.

  165. Low-temperature fabrication of polyerystalline Si thin film using Al-induced crystallization without native Al oxide at amorphous Si/Al interface Reviewed

    Sugimoto Y, Takata N, Hirota T, Ikeda K, Yoshida F, Nakashima H, Nakashima H

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS   Vol. 44 ( 7A ) page: 4770-4775   2005.7

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

    DOI: 10.1143/JJAP.44.4770

    Web of Science

  166. What I have learned through writing my first paper Invited

    TAKATA Naoki

      Vol. 55 ( 4 ) page: .   2005.4

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  167. Abnormal Grain Growth of off-Cube Grains in High Purity Aluminum Foils with Cube Texture

    Naoki Takata, Fuyuki Yoshida, Ken-ichi Ikeda, Hideharu Nakashima and Hiroshi Abe

    Materials Transactions   Vol. 46 ( 12 ) page: 2975-2980   2005

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  168. Atomic and Electronic Structure of <110> Symmetric Tilt Boundaries in Palladium

    Naoki Takata, Takashi Mizuguchi, Ken-ichi Ikeda and Hideharu Nakashima

    Materials Transactions   Vol. 45 ( 7 ) page: 2099-2105   2004

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/matertrans.45.2099

  169. Grain Boundary Energy and Atomic Structure of <110> Symmetric Tilt Boudaries in Copper

    Naoki Takata, Ken-ichi Ikeda, Fuyuki Yoshida, Hideharu Nakashima, Hiroshi Abe

    J. Japan Inst. Metals   Vol. 68 ( 4 ) page: 240-246   2004

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/jinstmet.68.240

  170. Influence of Purity on the Formation of Cube Texture in Aluminum Foils for Electrolytic Capacitors

    Naoki Takata, Ken-ichi Ikeda, Fuyuki Yoshida, Hideharu Nakashima and Hiroshi Abe

    Materials Transactions   Vol. 45 ( 5 ) page: 1687-1692   2004

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/matertrans.45.1687

  171. アルミ誘起結晶化法により作製した多結晶シリコン薄膜の組織

    廣田健,高田尚記,池田賢一,吉田冬樹,中島英治,阿部弘,杉本陽平,中島寛

    九州大学超高圧電顕室研究報告   ( 28 ) page: 59-60   2004

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  172. Grain boundary structure and its energy of < 110 > symmetric tilt boundary in copper Reviewed

    Takata N, Ikeda K, Yoshida F, Nakashima H, Abe H

    RECRYSTALLIZATION AND GRAIN GROWTH, PTS 1 AND 2   Vol. 467-470   page: 807-812   2004

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    Web of Science

  173. Character of non-cube oriented grains in high purity aluminum foils with cube texture

    YOSHIDA Fuyuki, TAKATA Naoki, IKEDA Ken-ichi, NAKASHIMA Hideharu, ABE Hiroshi

      Vol. 104   page: 157-158   2003.4

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  174. Effect of thermo-mechanical treatment on cube texture in aluminum foils for electrolytic capacitor

    TAKATA Naoki, IKEDA Ken-ichi, YOSHIDA Fuyuki, NAKASHIMA Hideharu, ABE Hiroshi

      Vol. 102   page: 79-80   2002.4

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  175. Influence of partial annealing temperature on cube texture in high purity aluminum foils Reviewed

    Ikeda K, Takata N, Yoshida F, Nakashima H, Abe H

    ALUMINUM ALLOYS 2002: THEIR PHYSICAL AND MECHANICAL PROPERTIES PTS 1-3   Vol. 396-4   page: 569-574   2002

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    Web of Science

  176. Formation processes of cube texture in 3N and 4N aluminum foils

    IKEDA Ken-ichi, TAKATA Naoki, YOSHIDA Fuyuki, NAKASHIMA Hideharu, ABE Hiroshi

      Vol. 100   page: 317-318   2001.4

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Books 8

  1. Fundamentals of Laser Powder Bed Fusion of Metals Reviewed International journal

    Pavel Krakhmalev, Anna Martin Vilardell, Naoki Takata( Role: Contributor ,  Chapter 13. Structural integrity I: Static mechanical properties)

    Elsevier Inc.  2021.6  ( ISBN:9780128240908

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    Total pages:654   Responsible for pages:349-376   Language:English Book type:Textbook, survey, introduction

    DOI: 10.1016/B978-0-12-824090-8.00019-6

    Other Link: https://www.sciencedirect.com/science/article/pii/B9780128240908000196?via%3Dihub#abs0010

  2. Structural integrity I: Static mechanical properties Reviewed International journal

    Krakhmalev P., Vilardell A.M., Takata N.( Role: Joint author)

    Fundamentals of Laser Powder Bed Fusion of Metals  2021.1  ( ISBN:9780128240908

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    Language:English Book type:Scholarly book

    Laser powder bed fusion (L-PBF) is one of the additive manufacturing methods to produce metallic parts. The layer-by-layer manufacturing nature results in the formation of specific microstructure, achieving different properties compared to conventional analogs. In this chapter, the mechanical properties of the main classes of materials such as steels, aluminum and titanium alloys, as well as nickel-base superalloys manufactured by L-PBF are overviewed. The focus is on the static mechanical properties obtained by tensile tests as the most common standard method for the measurement of mechanical characteristics. A correlation between manufacturing, microstructure, and mechanical properties of these L-PBF materials is highlighted.

    DOI: 10.1016/B978-0-12-824090-8.00019-6

    Scopus

  3. 金属材料実験の手引き 1. 組織観察 1-4 光学顕微鏡, SEM 観察のための試料の調整 Reviewed

    高田 尚記( Role: Sole author ,  1. 組織観察 1-4 光学顕微鏡, SEM 観察のための試料の調整)

    まてりあ・日本金属学会  2022.2 

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    Total pages:6   Responsible for pages:101-105   Language:Japanese Book type:Scholarly book

    金属組織学という学問分野があるように金属系材料にとっては組織に関する知見を得ることが極めて重要です. その組織観察の際に不可欠な技術が, 試料の形状調整と表面研磨技術です. どんな顕微鏡の達人でも, 表面状態の劣悪な試料では意味のある組織観察はできません. 本項では, 光学顕微鏡や SEM を用いた組織観察時に必要となる試料形状の調整や研磨方法についての初歩を概説します.

    DOI: https://doi.org/10.2320/materia.61.101

  4. 3Dプリンタ用材料開発と 造形物の高精度化・第12章第2節 金属3Dプリンタによる鉄鋼材料の造形条件の確立

    鈴木飛鳥,高田尚記,小橋眞,加藤正樹( Role: Joint author)

    技術情報協会  2020.5  ( ISBN:978-4-86104-793-0

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    Language:Japanese Book type:Scholarly book

  5. 物質循環とマテリアル開発 -マテリアル開発におけるシステム的思考の有用性ー

    小橋 眞,高田尚記( Role: Joint author ,  軽量材料)

    三恵社  2018.11  ( ISBN:978-4-86487-968-2

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    Total pages:12   Language:Japanese Book type:Textbook, survey, introduction

  6. 粉末冶金材料・複合材料・ポーラス材料

    高田 尚記,多機能性材料研究部会( Role: Joint author)

    軽金属  2017.8 

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    Total pages:4   Language:Japanese Book type:Report

  7. 合金化溶融亜鉛めっき鋼板の皮膜特性に及ぼす鋼中Si添加の影響

    高田尚記、竹山雅夫( Role: Joint author)

    一般社団法人 日本鉄鋼協会,材料の組織と特性部会  2014.6 

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    Language:Japanese

  8. 高温材料のフィジカルメタラジー研究会 最終報告書

    高田 尚記,松尾孝,竹山 雅夫( Role: Joint author)

    一般社団法人 日本鉄鋼協会,材料の組織と特性部会  2012 

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    Language:Japanese

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Presentations 127

  1. Strengthening by Controlled Al6Fe Intermetallic Phase in Al-Fe Based Alloys Additive-Manufactured by Laser Powder Bed Fusion International conference

    Naoki Takata, Wenyuan Wang, Takanobu Miyawaki, Yue Cheng, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    2022.12.1 

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    Event date: 2022.11 - 2022.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  2. Controlling α/Al6Fe Two-Phase Eutectic Structure in Cast Al-Fe Alloys by Addition of Mn and Cu Elements International conference

    Naoki Okano, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    2022 MRS fall meeting  2022.11.29 

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    Event date: 2022.11 - 2022.12

    Language:English   Presentation type:Poster presentation  

    Country:United States  

  3. Controlling Mg2Si Intermetallic Phase in Al-Si-Mg Alloy by Laser Additive Manufacturing Process and Post Heat Treatments International conference

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

    2022 MRS fall meeting  2022.11.29 

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    Event date: 2022.11 - 2022.12

    Language:English   Presentation type:Poster presentation  

    Country:United States  

  4. Strain Rate Dependence of Flow Stress in Single-Crystal Micropillars of bcc FeCrNi Solid Solutions International conference

    Tianqi Zhu, Naoki Takata, Makoto Kobashi, Masataka Yoshino

    2022 MRS fall meeting  2022.12.1 

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    Event date: 2022.11 - 2022.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  5. 金属3D積層造形したアルミニウム合金の溶融池組織がもたらす不均一変形と引張延性の異方性

    大谷祐貴、髙田尚 記、鈴木飛鳥、小橋眞、加藤正樹

    軽金属学会 第143回秋期大会  2022.11.12 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Poster presentation  

    Venue:東京工業大学   Country:Japan  

  6. L-PBF法によるAl-12%Si合金積層造形体が有する高強度と高加工硬化能の起源

    足立大樹、岩井駿 平、劉 牧霖、高田尚記、小橋 眞

    軽金属学会 第143回秋期大会  2022.11.12 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京工業大学   Country:Japan  

  7. 3Dインピーダンス法によるAl-12%Si合金積層造形体の耐食性におよぼす皮膜抵抗の評価

    宮澤 僚、星芳直、大谷祐貴、高田尚記、小橋眞

    軽金属学会 第143回秋期大会  2022.11.12 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京工業大学   Country:Japan  

  8. Al-Mg-Zn3元系耐熱合金の高温クリープ特性に及ぼす第4元素添加の影響

    近藤雅晶、鈴木智博、黎 若琪、高田 尚記

    軽金属学会 第143回秋期大会  2022.11.12 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京工業大学   Country:Japan  

  9. 製造プロセスを活かしたアルミニウム 合金の設計と組織制御 Invited

    高田 尚記

    軽金属学会 第143回秋期大会  2022.11.12 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東京工業大学   Country:Japan  

  10. 理論計算に基づく Al 鋳造合金の不純物元素の活用と製造プロセス革新 Invited

    高田 尚記

    2022 年度 鋳造工学会 東海支部 鋳造技術講演会  2022.10.28  鋳造工学会 東海支部

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    Event date: 2022.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:愛知県 刈谷市   Country:Japan  

  11. 溶融Al-25mol%Zn合金めっき鋼板の皮膜形成に及ぼすSi添加の影響

    高田尚記、大見泰央、鈴木飛鳥、小橋眞

    日本鉄鋼協会 2022年秋季講演大会  2022.9.21  日本鉄鋼協会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  12. Al-Fe合金積層造形体から作製した単結晶マイクロピラーの圧縮変形

    長子 明弘、朱 天斉、上杉 真太郎、髙田 尚記、鈴木 飛鳥、小橋 眞

    日本金属学会 2022年秋期講演大会  2022.9.22  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  13. Al–Mg–Zn–Cu–Ni合金の析出形態に及ぼす微量Ti添加の影響

    LI Ruoqi、髙田 尚記、鈴木 飛鳥、小橋 眞、近藤 雅晶、鈴木 智博

    日本金属学会 2022年秋期講演大会  2022.9.22  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  14. Mn及びCuを添加したAl-Fe鋳造合金のα/Al6Fe共晶組織と高温強度

    岡野 直輝、髙田 尚記、鈴木 飛鳥、小橋 眞

    日本金属学会 2022年秋期講演大会  2022.9.22  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  15. Al-Si-Cu鋳造合金の高温析出および室温時効硬化に及ぼすFeおよびMn添加の影響

    薫田 晃輔、黎 若琪、高田 尚記、鈴木 飛鳥、小橋 眞、岡田 裕二、古川 雄一

    日本金属学会 2022年秋期講演大会  2022.9.22  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  16. レーザ粉末床溶融結合したAl-Si合金の微視組織に及ぼすSi添加量の影響

    佐々 侑祐、國枝 真衣、鈴木 飛鳥、髙田 尚記、小橋 眞、加藤 正樹

    日本金属学会 2022年秋期講演大会  2022.9.22  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  17. レーザ粉末床溶融結合法を用いた炭素繊維/Al-Ti合金複合材料の積層造形

    青木 翼、鈴木 飛鳥、髙田 尚記、小橋 眞、加藤 正樹

    日本金属学会 2022年秋期講演大会  2022.9.22  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  18. Si量の異なるAl-Si合金積層造形体の相対密度と溶融池形態に及ぼすレーザ条件の影響

    國枝 真衣、宮坂 達也、鈴木 飛鳥、髙田 尚記、小橋 眞、加藤 正樹

    日本金属学会 2022年秋期講演大会  2022.9.22  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  19. デジタル画像相関法を用いたAl-Si合金積層造形体の変形挙動の解析

    大谷 祐貴、髙田 尚記、鈴木 飛鳥、小橋 眞、加藤 正樹

    日本金属学会 2022年秋期講演大会  2022.9.22  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  20. レーザ粉末床溶融結合法によるAl-Fe-Cu合金積層造形体の組織と機械的特性

    宮脇 孝暢、王 文苑、髙田 尚記、鈴木 飛鳥、小橋 眞、加藤 正樹

    日本金属学会 2022年秋期講演大会  2022.9.23  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  21. Al–12Si合金積層造形体の時効硬化に及ぼすレーザ条件の影響

    崎 啓人、髙田 尚記、鈴木 飛鳥、小橋 眞、加藤 正樹

    日本金属学会 2022年秋期講演大会  2022.9.23  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  22. レーザ粉末床溶融結合法によるAl-Fe-Mn3元系合金積層造形体の組織と高温強度

    王 文苑、髙田 尚記、鈴木 飛鳥、小橋 眞、加藤 正樹

    日本金属学会 2022年秋期講演大会  2022.9.23  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  23. Al-Si合金積層造形体における特異な変形応力のひずみ速度依存性

    高田 尚記、劉 牧霖、鈴木 飛鳥、小橋 眞、加藤正樹

    日本金属学会 2022年秋期講演大会  2022.9.22  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  24. レーザー粉末床溶融結合により作製したAl-Si合金の低温焼鈍に伴う電気抵抗率の変化

    小西 陽一郎、高田 尚記、小橋 眞、石川 和宏、宮嶋 陽司

    日本金属学会 2022年秋期講演大会  2022.9.20  日本金属学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:福岡工業大学   Country:Japan  

  25. Towards understanding microstructure development of aluminum alloys in rapid solidification by laser powder bed fusion Invited International conference

    Naoki Takata

    The 18th International Conference on Aluminium Alloys (ICAA18)  2022.9.6  The 18th International Conference on Aluminium Alloys (ICAA18)

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    Event date: 2022.9

    Language:English   Presentation type:Oral presentation (keynote)  

    Venue:Toyama, Japan   Country:Japan  

  26. Effect of laser conditions on the aging behavior of Al–12Si alloy additive-manufactured by laser powder bed fusion International conference

    Keito Saki, Naoki Takata, Asuka Suzuki, Makoto Kobashi, Masaki Kato

    The 18th International Conference on Aluminium Alloys (ICAA18)  2022.9.5  The 18th International Conference on Aluminium Alloys (ICAA18)

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    Event date: 2022.9

    Language:English   Presentation type:Poster presentation  

    Venue:Toyama, Japan   Country:Japan  

  27. Effect of Mn addition on processability and microstructure of Al-Fe alloy manufactured by laser powder bed fusion International conference

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

    The 18th International Conference on Aluminium Alloys (ICAA18)  2022.9.6  The 18th International Conference on Aluminium Alloys (ICAA18)

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    Event date: 2022.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Toyama, Japan   Country:Japan  

  28. Effects of Mn and Cu additions on solidification microstructure of near-eutectic Al-Fe alloy International conference

    Naoki Okano, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    The 18th International Conference on Aluminium Alloys (ICAA18)  2022.9.5  The 18th International Conference on Aluminium Alloys (ICAA18)

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    Event date: 2022.9

    Language:English   Presentation type:Poster presentation  

    Venue:Toyama, Japan   Country:Japan  

  29. Precipitation of intermetallic phases in novel heat-resistant Al–Mg–Zn–Cu–Ni alloy at elevated temperature International conference

    Ruoqi Li, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    The 18th International Conference on Aluminium Alloys (ICAA18)  2022.9.6  The 18th International Conference on Aluminium Alloys (ICAA18)

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    Event date: 2022.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Toyama, Japan   Country:Japan  

  30. Optimizing laser parameters and controlling microstructure/properties of laser powder bed fused Al-Si alloys International conference

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

    The 18th International Conference on Aluminium Alloys (ICAA18)  2022.9.6  The 18th International Conference on Aluminium Alloys (ICAA18)

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    Event date: 2022.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Toyama, Japan   Country:Japan  

  31. Additive manufacturing of carbon fiber/Al-Ti alloy composite by laser powder bed fusion International conference

    Tsubasa Aoki, Asuka Suzuki, Naoki Takata, Makoto Kobashi, Masaki Kato

    The 18th International Conference on Aluminium Alloys (ICAA18)  2022.9.5  The 18th International Conference on Aluminium Alloys (ICAA18)

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    Event date: 2022.9

    Language:English   Presentation type:Poster presentation  

    Venue:Toyama, Japan   Country:Japan  

  32. A new process index for optimizing laser powder bed fusion conditions to manufacture dense parts: Validation with Al-Si alloys International conference

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

    The 18th International Conference on Aluminium Alloys (ICAA18)  2022.9.5  The 18th International Conference on Aluminium Alloys (ICAA18)

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    Event date: 2022.9

    Language:English   Presentation type:Poster presentation  

    Venue:Toyama, Japan   Country:Japan  

  33. Al-Mg-Zn-Cu-Ni 五元系耐熱合金の金属間化合物相の析出形態と高温強度

    黎若琪,高田尚記,小橋眞,鈴木飛鳥

    2022 年度「高温材料の変形と破壊」研究会  2022.8.30  日本金属学会

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    Event date: 2022.8 - 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:北海道立道民活動センター かでる 2.7   Country:Japan  

  34. その場 SEM 観察とデジタル画像相関法を活用した Al 合金積層造形体の不 均一変形解析

    大谷祐貴,高田尚記,鈴木飛鳥,小橋眞,加藤正樹

    2022 年度「高温材料の変形と破壊」研究会  2022.9.1  日本金属学会

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    Event date: 2022.8 - 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:北海道立道民活動センター かでる 2.7   Country:Japan  

  35. マイクロピラー圧縮試験を利用した FeCrNi 固溶体単結晶における塑性変形 の熱活性化過程の測定

    朱天斉, 高田尚記, 小橋眞, 吉野正崇

    2022 年度「高温材料の変形と破壊」研究会  2022.9.1  日本金属学会

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    Event date: 2022.8 - 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:北海道立道民活動センター かでる 2.7   Country:Japan  

  36. L-PBF プロセス造形性と高強度化の両立に向けた Al-Fe 基合金の改良設計

    王文苑,高田尚記,鈴木飛鳥,小橋眞,加藤正樹

    2022 年度「高温材料の変形と破壊」研究会  2022.8.31  日本金属学会

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    Event date: 2022.8 - 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:北海道立道民活動センター かでる 2.7   Country:Japan  

  37. 金属3Dプリンタによる材料組織形成の理解に向けたFlash-DSCの適用 Invited

    高田 尚記

    熱分析オンラインセミナー STARe Infodays 2022  2022.8.25  メトラートレド

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    Event date: 2022.8

    Language:Japanese   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

    Venue:オンライン開催   Country:Japan  

  38. Al-Si合金積層造形体における降伏強度の負のひずみ速度依存性

    高田 尚記、劉 牧霖、鈴木 飛鳥、小橋 眞、加藤正樹

    軽金属学会 第142回春期講演大会  2022.5.28  軽金属学会

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    Event date: 2022.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  39. レーザ粉末床溶融結合法により作製したSi添加量の異なるAl-Si合金の微視組織

    佐々侑祐,鈴木飛鳥,髙田尚記,小橋 眞,加藤正樹

    軽金属学会 第142回春期講演大会  2022.5.28  軽金属学会

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    Event date: 2022.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催   Country:Japan  

  40. 機械学習を用いたアルミニウム合金ラティス構造体の熱伝達特性と圧力損失の予測

    中谷英人,鈴木飛鳥,髙田尚記,小橋 眞

    軽金属学会 第142回春期講演大会  2022.5.28  軽金属学会

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    Event date: 2022.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催   Country:Japan  

  41. Al-Si-Cu鋳造合金の高温析出に及ぼすFeおよびMn添加の影響

    薫田晃輔、黎若琪、髙田尚記、鈴木飛鳥、小橋 眞、岡田裕二、古川雄一

    軽金属学会 第142回春期講演大会  2022.5.28  軽金属学会

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    Event date: 2022.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催   Country:Japan  

  42. Al-Fe合金積層造形体から作製した単結晶マイクロピラーの圧縮強度と加工硬化

    長子明弘,朱 天斉,上杉真太郎,髙田尚記,鈴木飛鳥,小橋 眞

    軽金属学会 第142回春期講演大会  2022.5.28  軽金属学会

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    Event date: 2022.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催   Country:Japan  

  43. レーザー粉末床溶融結合法を用いたAl-2.5%Fe-2%Cu合金の積層造形

    宮脇孝暢、王 文苑、髙田尚記、鈴木飛鳥、小橋 眞、加藤正樹

    軽金属学会 第142回春期講演大会  2022.5.28  軽金属学会

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    Event date: 2022.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催   Country:Japan  

  44. 燃焼合成発泡法によるポーラスL12型(Al,Fe)3Tiの反応過程

    三谷祥大、鈴木飛鳥、髙田尚記、小橋 眞、岡田裕二、古川雄一

    軽金属学会 第142回春期講演大会  2022.5.28  軽金属学会

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    Event date: 2022.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催   Country:Japan  

  45. Al-Si合金積層造形体における不均一変形のその場SEM観察

    大谷祐貴、高田 尚記、鈴木 飛鳥、小橋 眞、加藤正樹

    軽金属学会 第142回春期講演大会  2022.5.28  軽金属学会

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    Event date: 2022.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  46. レーザ積層造形技術が創出するアルミニウム合金の力学機能

    高田 尚記

    日本金属学会九州支部・日本鉄鋼協会九州支部 第347 回材料科学談話会  2022.5.9  日本金属学会九州支部・日本鉄鋼協会九州支部

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    Event date: 2022.5

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:九州大学 筑紫キャンパス   Country:Japan  

  47. Fe-18Cr単結晶マイクロピラーの塑性変形の熱活性化過程に及ぼす固溶Niの影響

    朱 天斉、李 鴻美、高田 尚記、小橋 眞、吉野 正崇

    日本金属学会 2022年春期講演大会  2022.3.22  日本金属学会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催   Country:Japan  

  48. 機械学習を活用したレーザ粉末床溶融結合によるWC/Co超硬合金の最適造形条件探索

    鈴木 飛鳥、柴 勇輔、伊部 博之、高田 尚記、小橋 眞

    日本金属学会 2022年春期講演大会  2022.3.17  日本金属学会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  49. 超高速示差走査型熱量計を利用したAl合金粉末の急冷凝固組織解析

    高田 尚記、劉 牧霖、李 鴻美、鈴木 飛鳥、小橋 眞

    日本金属学会 2022年春期講演大会  2022.3.16  日本金属学会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  50. Al–Mg–Zn–Cu–Ni5元系合金の高温時効に伴う金属間化合物相の析出

    Li Ruoqi、髙田 尚記、鈴木 飛鳥、小橋 眞

    日本金属学会 2022年春期講演大会  2022.3.16  日本金属学会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  51. Al-Fe-Mn合金粉末を用いたレーザ粉末床溶融結合法の造形性に及ぼすレーザ条件の影響

    王 文苑、高田 尚記、鈴木 飛鳥、小橋 眞、加藤 正樹

    日本金属学会 2022年春期講演大会  2022.3.17  日本金属学会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  52. 表面処理鋼板の溶融めっき皮膜構造制御 Invited

    高田 尚記

    日本鉄鋼協会 2022年春季(第183回)講演大会  2022.3.16  日本鉄鋼協会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:オンライン開催   Country:Japan  

  53. レーザ粉末床溶融結合法によるマルエージング鋼積層造形体の オーステナイト逆変態制御 Invited

    高田 尚記

    日本鉄鋼協会 『 高温材料の高強度化Ⅲ 』シンポジウム  2022.3.15  日本鉄鋼協会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:オンライン開催   Country:Japan  

  54. Laser Additive Manufacturing of Light-Weight Aluminum Alloys Invited International conference

    Naoki Takata

    2022.2.24 

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    Event date: 2022.2

    Language:English   Presentation type:Symposium, workshop panel (nominated)  

    Country:Japan  

  55. 表面処理鋼板の溶融亜鉛合金めっき皮膜構造制御 Invited

    高田 尚記

    SURTECH2022 表面技術要素展 表面技術協会 ヘテロ界面制御部会 第8回研究会   2022.1.27  表面技術協会

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    Event date: 2022.1

    Language:Japanese   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

    Venue:オンライン開催   Country:Japan  

  56. アルミニウム材料の研究開発最前線 Invited

    小橋 眞、高田 尚記

    GiSM 設立記念プレシンポジウム  2022.1.21  東海国立大学機構名古屋大学

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    Event date: 2022.1

    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

    Venue:名古屋   Country:Japan  

  57. In-Situ Scanning Electron Microscopy Observation of Crack Initiation and Propagation in Hot-Dip Zn-Al-Mg Alloy Coating on Steel Sheets International conference

    Tsuyoshi Fukata, Hiroki Yokoi, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    The Material Research Meeting 2021 :MRM2021  2021.12.14  MRS-J

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    Event date: 2021.12

    Language:English   Presentation type:Poster presentation  

    Venue:Yokohama   Country:Japan  

  58. Enhanced Strength and Ductility of Additive-Manufactured Al-Si Alloy by Direct Aging Treatment" International conference

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

    The Material Research Meeting 2021 :MRM2021  2021.12.14  MRS-J

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    Event date: 2021.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Yokohama   Country:Japan  

  59. High Temperature Strength and Thermal Stability of Additive- Manufactured Hypereutectic Al-Fe Alloy International conference

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

    The Material Research Meeting 2021 :MRM2021  2021.12.14  MRS-J

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    Event date: 2021.12

    Language:English   Presentation type:Poster presentation  

    Venue:Yokohama   Country:Japan  

  60. Influence of Cu and Ni additions on precipitation of intermetallic phases in heat-resistant Al-Mg-Zn ternary alloy International conference

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

    The Material Research Meeting 2021 :MRM2021  2021.12.14  MRS-J

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    Event date: 2021.12

    Language:English   Presentation type:Poster presentation  

    Venue:Yokohama   Country:Japan  

  61. Al-Si積層造形材における放射光In-situ XRD測定を用いた変形挙動の解析

    岩井駿平・平田雅裕・劉 牧霖・高田尚記・小橋 眞・足立大樹

    軽金属学会 第141回秋期大会  2021.11.13  軽金属学会

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    Event date: 2021.11

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催   Country:Japan  

  62. 焼合成発泡法によるポーラスL12型(Al, Fe)3Tiのセル構造制御と力学特性

    藤代暉雅・鈴木飛鳥・髙田尚記・小橋 眞・岡田裕二・古川雄一

    軽金属学会 第141回秋期大会  2021.11.14  軽金属学会

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    Event date: 2021.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  63. レーザ粉末床溶融結合法によるAlSi10Mg合金積層造形体における活性化体積の評価

    中村祐太・高田尚記・小橋 眞・石川和宏・宮嶋陽司

    軽金属学会 第141回秋期大会  2021.11.14  軽金属学会

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    Event date: 2021.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  64. Al-Ti-C粉末を用いた付加製造法によるアルミニウム/樹脂接合用アンカー構造に及ぼす粉末組成の影響

    鈴木飛鳥・金 昇光・高田尚記・小橋眞

    軽金属学会 第141回秋期大会  2021.11.13  軽金属学会

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    Event date: 2021.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  65. A5052/CFRTP接合体の応力分布と接合強度に及ぼす付加製造アンカー層配置の影響

    岩田慶一郎・小橋 眞・髙田尚記・鈴木飛鳥

    軽金属学会 第141回秋期大会  2021.11.13  軽金属学会

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    Event date: 2021.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  66. レーザ粉末床溶融結合法を用いたAl-Ti合金/炭素繊維複合材料の積層造形

    青木 翼・鈴木飛鳥・髙田尚記・小橋 眞

    軽金属学会 第141回秋期大会  2021.11.13  軽金属学会

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    Event date: 2021.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  67. 溶融アルミニウム合金/炭素繊維間の界面現象の速度論評価とそれに基づく複合材料の作製

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

    軽金属学会 第141回秋期大会  2021.11.13  軽金属学会

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    Event date: 2021.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  68. 燃焼合成発泡法によるポーラス L12型(Al, Fe)3Tiのセル構造と微視組織

    鈴木飛鳥、藤代暉雅、髙田尚記、小橋 眞、岡田裕二、古川雄一

    粉体粉末冶金協会 2021年度秋季大会  2021.11.9  粉体粉末冶金協会

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    Event date: 2021.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  69. Al-Si合金積層造形体のレーザパラメータ最適化と組織・特性制御

    鈴木 飛鳥、宮坂 達也、高田 尚記、小橋 眞、加藤 正樹

    粉体粉末冶金協会 2021年度秋季大会  2021.11.9  粉体粉末冶金協会

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    Event date: 2021.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  70. 機械学習を援用した WC/Co超硬合金のレーザ積層造形プロセスパラメータ最適化

    柴 勇輔、伊部 博之、鈴木 飛鳥、髙田 尚記、小橋 眞、加藤 正樹

    粉体粉末冶金協会 2021年度秋季大会  2021.11.10  粉体粉末冶金協会

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    Event date: 2021.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  71. Nb添加したFe-18Cr単結晶マイクロピラーの塑性変形に及ぼす固溶元素と析出物の影響"

    李 鴻美、朱 天斉、高田 尚記、小橋 眞、吉野 正崇

    日本金属学会 第169回秋期大会  2021.9.17  日本金属学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  72. Niを固溶した18Crフェライト系ステンレス鋼から作製した単結晶マイクロピラーの圧縮特性

    朱 天斉、李 鴻美、高田 尚記、小橋 眞、吉野 正崇

    日本金属学会 第169回秋期大会  2021.9.17  日本金属学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  73. マイクロピラー圧縮試験を利用した塑性変形の熱活性化過程の測定

    高田 尚記、朱 天斎、李 鴻美、鈴木 飛鳥、小橋 眞、吉野 正崇

    日本金属学会 第169回秋期大会  2021.9.17  日本金属学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  74. α-AlT-Al6Mg11Zn11二相共晶合金積層造形体の微視組織とその熱処理の影響

    崎 啓人、王 文苑、高田 尚記、鈴木 飛鳥、小橋 眞、加藤 正樹

    日本金属学会 第169回秋期大会  2021.9.16  日本金属学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  75. 耐熱アルミニウム合金設計に資するAl-Mg-Zn-Cu-Ni 5元系における相平衡の同定

    石井 大貴、高田 尚記、鈴木 飛鳥、小橋 眞

    日本金属学会 第169回秋期大会  2021.9.16  日本金属学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  76. Al-Mg-Zn3元系共晶合金の凝固組織と室温破壊靭性

    岡野 直輝、相川 宗也、髙田 尚記、鈴木 飛鳥、小橋 眞

    日本金属学会 第169回秋期大会  2021.9.16  日本金属学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  77. Al-Si合金積層造形体の相対密度と組織に及ぼすハッチ距離の影響

    國枝 真衣、宮坂 達也、鈴木 飛鳥、髙田 尚記、小橋 眞、加藤 正樹

    日本金属学会 第169回秋期大会  2021.9.16  日本金属学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  78. Al-Si-Cu鋳造合金の400℃以上の高温時効硬化及びその後の自然時効

    黎若琪,高田尚記,鈴木飛鳥,小橋 眞,岡田裕二,古川雄一

    日本金属学会 秋期大会  2021.9.14  日本金属学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  79. 溶融Al-Ti合金/炭素繊維間の界面現象の速度論評価

    鈴木飛鳥,石黒廉吉,高田尚記,小橋 眞,岡田裕二,古川雄一

    日本金属学会 第169回秋期大会  2021.9.15  日本金属学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  80. Controlling mechanical properties of laser powder bed fused Al–2.5Fe binary alloy by heat treatments

    Qi Xing、高田 尚記、鈴木 飛鳥、小橋 眞、加藤 正樹

    日本金属学会 第169回秋期大会  2021.9.15  日本金属学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  81. 過共晶Al-Fe合金積層造形体の高温強度

    王 文苑、高田 尚記、鈴木 飛鳥、小橋 眞、加藤 正樹

    日本金属学会 第169回秋期大会  2021.9.15  日本金属学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  82. 溶融Zn-Al-Mg合金めっき皮膜における3相共晶組織の熱処理に伴う変化

    深田剛志、髙田尚記、鈴木 飛鳥、小橋 眞

    日本鉄鋼協会第182回秋季講演大会  2021.9.3  日本鉄鋼協会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  83. FORMATION SEQUENCE OF Fe-Al INTERMETALLIC PHASES IN HOT-DIP Zn-Al-Mg ALLOY GALVANIZED STEELS International conference

    Naoki Takata, Hiroki Yokoi, Asuka Suzuki, Makoto Kobashi

    GALVATEC 2021 - 12th International Conference on Zinc and Zinc Alloy Coated Steel  2021.6.21 

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    Event date: 2021.6

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Vienna (Online)   Country:Austria  

    Other Link: https://www.galvatech2020.org/

  84. 反応焼結で作製した Al/Ti/Al3Ti複合材料の組織と熱伝導率

    中村 俊太、鈴木 飛鳥、高田 尚記、小橋 眞

    粉体粉末冶金協会 2021年度春季⼤会  2021.6.1  一般社団法人 粉体粉末冶金協会

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    Event date: 2021.6

    Language:Japanese  

    Venue:オンライン開催   Country:Japan  

  85. 炭素含有量の異なる LPBF造形 WC-Coのη相形成と硬度に及ぼす熱処理の影響

    伊部 博之、山田 純也、加藤 雄太、加藤 正樹、鈴木 飛鳥、高田 尚記、小橋 眞

    粉体粉末冶金協会 2021年度春季⼤会  2021.6.1  一般社団法人 粉体粉末冶金協会

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    Event date: 2021.6

    Language:Japanese  

    Venue:オンライン開催   Country:Japan  

  86. 三元共晶合金粉末を用いたアルミニウム粉末の低温無加圧焼結プロセス

    林 秀亮、鈴木 飛鳥、高田 尚記、小橋 眞

    粉体粉末冶金協会 2021年度春季⼤会  2021.6.1  一般社団法人 粉体粉末冶金協会

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    Event date: 2021.6

    Language:Japanese  

    Venue:オンライン開催   Country:Japan  

  87. レーザ粉末床溶融結合法によるα-Al/T-Al6Mg11Zn11二相共晶合金の積層造形

    崎啓人,王文苑,高田尚記,鈴木飛鳥,小橋 眞,加藤正樹

    軽金属学会 第140回春期大会  2021.5.15  軽金属学会

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    Event date: 2021.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催  

    Other Link: https://www.jilm.or.jp/convention/index

  88. 積層造形の適用に向けたAl-Ti-C粉末へのシングルレーザスキャンに伴う組織変化の評価

    青木翼,鈴木飛鳥,高田尚記,小橋 眞

    軽金属学会 第140回春期大会  2021.5.15  軽金属学会

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    Event date: 2021.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催  

    Other Link: https://www.jilm.or.jp/convention/index

  89. レーザ粉末床溶融結合により積層造形されたAl-12%Si合金の相対密度と組織に及ぼすハッチ距離の影響

    國枝真衣,宮坂達也,鈴木飛鳥,高田尚記,小橋 眞,加藤正樹

    軽金属学会 第140回春期大会  2021.5.15  軽金属学会

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    Event date: 2021.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催  

    Other Link: https://www.jilm.or.jp/convention/index

  90. 時効処理を利用したAl-Si合金積層造形体の高強度と延性の両立

    髙田 尚記、劉 牧霖、鈴木 飛鳥、小橋 眞、加藤 正樹

    軽金属学会 第140回春期大会  2021.5.15  軽金属学会

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    Event date: 2021.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催  

  91. C15型結晶構造に基づき設計したAl-Si合金ラティス構造の圧縮特性

    劉肖揚,鈴木飛鳥,髙田尚記,小橋 眞,加藤正樹

    軽金属学会 第140回春期大会  2021.5.15  軽金属学会

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    Event date: 2021.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催  

    Other Link: https://www.jilm.or.jp/convention/index

  92. Al-Mg-Zn3元系の共晶反応を利用したAl基鋳造合金の凝固組織と室温靭性

    岡野直輝,相川宗也,高田尚記,鈴木飛鳥,小橋 眞

    軽金属学会 第140回春期大会  2021.5.15  軽金属学会

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    Event date: 2021.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン開催  

    Other Link: https://www.jilm.or.jp/convention/index

  93. 汎用Al-Si-Cu合金の400℃以上の高温における析出とその後の自然時効硬化

    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 第140回春期大会  2021.5.15  軽金属学会

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    Event date: 2021.5

    Language:English   Presentation type:Poster presentation  

    Venue:オンライン開催  

    Other Link: https://www.jilm.or.jp/convention/index

  94. TiC粒子を添加したポーラスAl3Tiの燃焼合成における発泡挙動と反応過程

    鈴木飛鳥,犬飼貴雅,高田尚記,小橋 眞,岡田裕二,古川雄一

    軽金属学会 第140回春期大会  2021.5.15  軽金属学会

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    Event date: 2021.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催  

    Other Link: https://www.jilm.or.jp/convention/index

  95. Microstructural morphology of Al-based eutectic composites reinforced by T-Al6Mg11Zn11 intermetallic phase Invited International conference

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

    THERMEC‘2021 – International Conference on Processing & Manufactoring of advanced Materials  2021.5.12 

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    Event date: 2021.5

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Vienna (Online)   Country:Austria  

    Other Link: https://www.tugraz.at/events/thermec-2021/home/

  96. Multi-scale structural control of porous layer on Al alloy sheets fabricated through laser-assisted powder metallurgical process for joining with polymer International conference

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

    THERMEC‘2021 – International Conference on Processing & Manufactoring of advanced Materials  2021.5.14 

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    Event date: 2021.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Vienna (Online)   Country:Austria  

    Other Link: https://www.tugraz.at/events/thermec-2021/home/

  97. Microstructure of Al-2.5Fe binary alloy fabricated by laser powder bed fusion International conference

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

    THERMEC‘2021 – International Conference on Processing & Manufactoring of advanced Materials  2021.5.13 

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    Event date: 2021.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Vienna (Online)   Country:Austria  

    Other Link: https://www.tugraz.at/events/thermec-2021/home/

  98. Inhomogeneous microstructure and its thermal stability of AlSi10Mg lattice structure manufactured via laser powder bed fusion International conference

    Mulin Liu, Naoki Takata, Asuka Suzuki, Makoto Kobashi

    THERMEC‘2021 – International Conference on Processing & Manufactoring of advanced Materials  2021.5.14 

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    Event date: 2021.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Vienna (Online)   Country:Austria  

    Other Link: https://www.tugraz.at/events/thermec-2021/home/

  99. Optimization of laser parameters for laser powder bed fusion process based on deposited energy density Invited International conference

    Asuka Suzuki, Ryoya Nishida, Naoki Takata, Makoto Kobashi

    THERMEC‘2021 – International Conference on Processing & Manufactoring of advanced Materials  2021.5.13 

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    Event date: 2021.5

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Vienna (Online)   Country:Austria  

    Other Link: https://www.tugraz.at/events/thermec-2021/home/

  100. 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

    日本鉄鋼協会第181回春季講演大会  2021.3.18  日本鉄鋼協会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  101. Al-Zn-Mg 3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回秋期大会 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  102. 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 

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    Event date: 2020.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:香川大学   Country:Japan  

  103. 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 

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    Event date: 2020.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京工業大学 大岡山キャンパス   Country:Japan  

  104. Anomalous size-dependent strength in micropillar compression deformation of commercial-purity aluminum single-crystals Invited International conference

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

    International Conference on Plasticity, Damage, and Fracture 2020 

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    Event date: 2020.1

    Language:English   Presentation type:Oral presentation (keynote)  

    Venue:Rivera Maya   Country:Mexico  

  105. 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回秋期大会プログラム 

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    Event date: 2019.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京農工大学 小金井キャンパス   Country:Japan  

  106. Effect of sample dimensions on microstructure of selectively laser melted AlSi10Mg alloy International conference

    Naoki Takata, Hirohisa Kodaira, Asuka Suzuki Makoto Kobashi

    Materials Science & Technology (MS&T) 2019 

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    Event date: 2019.9 - 2019.10

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Portland   Country:United States  

  107. 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 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

  108. Design of novel aluminum alloys strengthened by T-Al6Mg11Zn11 phase for high temperature applications International conference

    EUROMAT 2019 

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    Event date: 2019.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Sweden  

  109. 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 Invited

    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 

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    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東京工業大学すずかけ台キャンパス   Country:Japan  

  110. 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

    軽金属学会春期講演大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山国際会議場   Country:Japan  

  111. 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 

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    Event date: 2019.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京電機大学   Country:Japan  

  112. 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 

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    Event date: 2018.11

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Boston   Country:United States  

  113. 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の理解 Invited

    高田尚記

    日本金属学会・日本鉄橋協会 東海支部 若手材料研究会 

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    Event date: 2018.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:オフィスパーク名駅,名古屋   Country:Japan  

  114. レーザ積層造形技術が生み出す金属造形体の特異な組織形成の理解

    高田 尚記

    日本金属学会 第2回若手研究グループ 「多様な先端観察・測定法を用いた組織の定量と力学特性解析への適用」 

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    Event date: 2018.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:新日鐵住金株式会社 コミュニケーションセンター   Country:Japan  

  115. PBF法により造形されたアルミニウム合金の微視組織的特徴 Invited

    高田尚記

    軽金属学会 第109回シンポジウム 「金属学研究者と技術者のための3Dプリンタ科学・技術・造形事例」 

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    Event date: 2018.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:千葉工業大学津田沼キャンパス    Country:Japan  

  116. 金属3D プリンタ造形体の特異な微視組織と力学特性 Invited

    高田尚記

    本多光太郎・湯川記念合同講演会 

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    Event date: 2018.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋大学   Country:Japan  

  117. 金属3Dプリンタが生み出す特異な組織と塑性変形挙動 Invited

    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2018年秋期講演大会 

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    Event date: 2018.9

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:東北大学   Country:Japan  

  118. Solidification Microstructures of alpha-Al/Intermetallics Eutectic Alloys in Al–Zn–Mg Ternary System Invited International conference

    Naoki Takata, Taiki Okano, Asuka Suzuki, Makoto Kobashi

    Thermec' 2018  

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    Event date: 2018.7

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Paris   Country:France  

  119. Size Dependence of Strength of Single-Crystal Pure Aluminum Micropillars International conference

    Naoki Takata, Soichiro Takeyasu, Asuka Suzuki, Makoto Kobashi

    Sixth International Indentation Workshop (IIW6)  

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    Event date: 2018.7

    Language:English   Presentation type:Poster presentation  

    Venue:Sapporo   Country:Japan  

  120. Texture development of AlSi10Mg alloy fabricated by selectively laser melting International conference

    Naoki Takata, Hirohisa Kodaira, Asuka Suzuki, Makoto Kobashi

    16th International Conference on Aluminum Alloys (ICAA16) 

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    Event date: 2018.6

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Motreal   Country:Canada  

  121. Solid Fe/Liquid Zn Interfacial Reaction of Hot-Dip Galvanized Fe-Si Alloy Sheets Invited International conference

    Naoki Takata, Kunihisa Hayano, Asuka Suzuki, Makoto Kobashi

    GALVATECH 2017 

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    Event date: 2017.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Tokyo   Country:Japan  

    Scopus

  122. 鋼板/溶融亜鉛の固液界面反応を通じた金属間化合物の形成 Invited

    高田 尚記

    一般社団法人表面技術協会 第136回講演大会 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:金沢工業大学   Country:Japan  

  123. 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 Invited

    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 2017年秋期講演大会 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:北海道大学   Country:Japan  

  124. 金属粉末積層造形に伴う微視組織形成の理解とその鉄鋼材料への応用 Invited

    高田 尚記

    技術講演会「金属3Dプリンタの新展開」 

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    Event date: 2017.8

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:あいち産業科学技術総合センター   Country:Japan  

  125. Compressive Strength of Porous Ti-Al Intermetallics Fabricated by Combustion Synthesis with Space Holder Powder International conference

    Naoki Takata, Keisuke Uematsu, Makoto Kobashi

    2016 MRS Fall Meeting & Exhibit 

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    Event date: 2016.11 - 2016.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Boston, MA, USA   Country:United States  

  126. Solid Fe/Liquid Zn Interfacial Reaction of Hot-Dip Galvanized Dual-Phase Steels International conference

    Naoki Takata, Makoto Kobashi, Masao Takeyama

    PRICM9 

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    Event date: 2016.8

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  127. Solidification Pathway for the Formation of Bbcc/T1/T2 Three-Phase Microstructure in Mo-Nb-Si-B Quaternary System International conference

    Naoki Takata, Nobuaki Sekido, Michel Figueroa, Masao Takeyama, John H. Perepezko

    THERMEC' 2016 

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    Event date: 2016.5 - 2016.6

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Austria  

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Research Project for Joint Research, Competitive Funding, etc. 32

  1. 金属3Dプリンタを用いた非平衡組織・準安定相の創出

    Grant number:22688912  2022.10 - 2025.3

    科学技術振興機構(JST)  戦略的創造研究推進事業 さきがけ  [未来材料] 物質探索空間の拡大による未来材料の創製

    高田尚記

      More details

    Grant type:Competitive

    Grant amount:\38000000 ( Direct Cost: \38000000 )

    AlやFeを基軸とする種々の元素を組み合わせた成分系において、金属3Dプリンタ技術のひとつであるレーザ粉末床溶融結合(L-PBF)プロセスが創出する非平衡組織と準安定相の特徴を抽出し、L-PBFプロセスによる製造材の優れた機械的性質の発現機構を解明します。本成果を基に、多元素化による非平衡組織・準安定相の制御に資する学術基盤の構築を目指します

  2. レーザ3D積層造形が創出するアルミニウム合金の新奇力学機能とその制御

    2021.9 - 2023.8

    公益財団法人 軽金属奨学会  統合的先端研究 

    高田尚記, 小橋眞,足立大樹,宮嶋陽司

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\24000000 ( Direct Cost: \24000000 )

  3. アルミニウム積層造形体の延性異方性を生み出す不均一変形のその場観察と定量解析

    2023.4 - 2025.3

    天田財団   2022年度助成事業  一般研究開発助成

    高田尚記

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\3000000 ( Direct Cost: \3000000 )

  4. 金属3Dプリンタ造形体の複合構造コーティングによる高機能・多機能化 International coauthorship

    Grant number:S22069  2022.12 - 2023.1

    外国人研究者招へい事業  外国人招へい研究者

    Prasad Manepalli Jagannadha Nageswara vara

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\150000 ( Direct Cost: \150000 )

  5. 溶融めっき皮膜の機能創出に資する構造因子

    2022.4 - 2025.3

    研究会 I (シーズ型) 

    国内大学、日本製鉄、JFEスチール、神戸製鋼所 の研究者20名

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\11000000

  6. 3D積層造形技術を活⽤した鉄鋼のオーステナイト逆変態制御

    2022.1 - 2022.12

    公益財団法⼈JFE21世紀財団  技術研究助成  鉄鋼技術研究

    高田尚記

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\2000000 ( Direct Cost: \2000000 )

  7. Deformation mechanisms of superlattices and nanocomposite based multifunctional nanolaminates International coauthorship

    2022.1 - 2022.12

    MIRAI2.0 – Joint seed funding of Japan-Sweden collaborative project 

    高田尚記、Naureen Ghafoor

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Grant amount:\400000

  8. アルミニウム合金の組成、プロセスと特性の研究

    2021.4

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    Authorship:Principal investigator  Grant type:Collaborative (industry/university)

  9. アルミ鋳造合金における時効析出の研究

    2021.4

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    Authorship:Principal investigator  Grant type:Collaborative (industry/university)

  10. マイクロ金属単結晶の強度に及ぼす材料強化因子の役割

    2020.9 - 2022.9

    第1回フロンティア研究助成 

    高田 尚記

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    Grant type:Competitive

  11. 金属3Dプリンタ材料の開発に関する学術コンサルタント

    2020.4

  12. 耐熱金属材料の強化メカニズムに関する学術コンサルタント

    2020.4

  13. AM造形アルミ材の腐食進展メカニズム解明

    2020.3 - 2021.3

    企業からの受託研究 

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    Authorship:Principal investigator  Grant type:Collaborative (industry/university)

  14. Designing and Microstructural Control of Cast-Type Aluminum-Based Superalloys Applicable at 300°C in Service

    2019.10 - 2021.3

    Naoki Takata

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    Grant type:Competitive

  15. Al-Si-Cu-Mg鋳造合金における高温域時効析出の研究

    2019.4 - 2021.3

    企業からの受託研究 

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    Grant type:Collaborative (industry/university)

  16. 共晶反応を利用した新規耐熱アルミニウム鋳造合金の設計と凝固組織制御

    2019.4 - 2020.3

    中長期需要・技術開発委員会 研究助成 

    高田 尚記

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    Grant type:Competitive

  17. 鉄鋼材料への高機能溶融亜鉛合金めっき皮膜創製とその構造制御

    2018.9 - 2021.3

    材料科学研究助成金 特別助成 

    高田尚記

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    Grant type:Competitive

  18. 革新的耐熱アルミニウム合金の研究開発

    2018.4 - 2021.3

    企業からの受託研究 

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    Authorship:Principal investigator  Grant type:Collaborative (industry/university)

  19. 新規軽量耐熱合金の探索

    2017.10 - 2020.3

    企業からの受託研究 

  20. フェライト系ステンレス鋼の靭性に及ぼすスタビライズ元素の影響

    2017.4

    企業からの受託研究 

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    Authorship:Principal investigator 

  21. 共晶反応を利用した新規耐熱アルミニウム鋳造合金の設計と凝固組織制御

    2017.4 - 2019.3

    アルミニウム研究助成事業 

    高田尚記

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    Grant type:Competitive

  22. 金属間化合物を強化相とした新規耐熱アルミニウム合金の設計と組織制御

    2017.4 - 2018.3

    研究助成 

    高田 尚記

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    Grant type:Competitive

  23. アルミニウム合金から作製したα-Al(fcc)単結晶マイクロピラーの強度に及ぼす転位源の影響

    2017.4 - 2018.3

    研究補助金 

    高田尚記

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    Grant type:Competitive

  24. 階層的マルチヘテロ構造の創出によるアルミニウム合金の多機能化とその指導原理の解明

    2016.10 - 2020.3

    産学共創基礎基盤研究プログラム 「革新的構造用金属材料創製を目指したヘテロ構造制御に基づく新指導原理の構築」 

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    Grant type:Competitive

  25. マイクロピラー圧縮試験法を⽤いたアルミニウム合⾦の局所変形抵抗の評価

    2016.10 - 2019.3

    塑性加工 一般研究開発助成 

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    Grant type:Competitive

  26. 高機能溶融亜鉛めっき皮膜創成とナノ解析

    2016.4 - 2019.3

    受託研究 

  27. 溶融亜鉛めっき高強度複相鋼の材料設計に関する研究

    2016.4 - 2018.3

    機械工業振興補助事業 

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    Grant type:Competitive

  28. マイクロピラー圧縮試験による鉄鋼材料の局所力学特性評価法の確立

    2016.1 - 2016.12

    JFE21世紀財団 研究助成 

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    Grant type:Competitive

  29. 先進材料の製造プロセス、物性、実用化に関する国際会議での招待講演への参加

    2016

    永井科学技術財団 国際交流助成金 

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    Grant type:Competitive

  30. 革新的800℃級火力発電プラント用超耐熱鋼の設計原理

    2010 - 2016.3

    先端的低炭素化技術開発事業(ALCA) 

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    Grant type:Competitive

  31. オーステナイト系耐熱鋼のクリープ抵抗における結晶粒界の役割

    2009 - 2011.3

    鉄鋼研究振興助成 

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    Grant type:Competitive

  32. Nano-DP鋼板に関する共同研究

    2007.4 - 2008.3

    企業からの受託研究 

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KAKENHI (Grants-in-Aid for Scientific Research) 7

  1. Modified design for aluminum-based superalloys for improvement of creep rupture life at elevated temperatures above 200 degrees C

    Grant number:20H02462  2020.4 - 2023.3

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    Authorship:Principal investigator 

    Grant amount:\17290000 ( Direct Cost: \13300000 、 Indirect Cost:\3990000 )

  2. Design and microstructure control of aluminum based superalloys based on thermodynamic calculation

    Grant number:17H03411  2017.4 - 2020.3

    Takata Naoki

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    Authorship:Principal investigator 

    Grant amount:\16250000 ( Direct Cost: \12500000 、 Indirect Cost:\3750000 )

    We designed an aluminum (Al)-based alloy with the alpha-Al (fcc) matrix strengthened by the T-Al6Mg11Zn11 (cubic) intermetallic phase using a large two-phase region of alpha and T phases in the Al-Mg-Zn ternary system. Thermodynamic calculations assessed a composition of Al-5Mg-3.5Zn (at.%) for the designed alloy. The granular precipitates of the T phase were dispersed rather homogenously in the alpha-Al matrix at temperatures above 300°C. After aging at 200°C, numerous fine precipitates with a mean size of ~20 nm in the grain interior were observed. The present alloy (pre-aged at 200°C for 1 h) exhibited a high yield strength of approximately 260 MPa at 200°C, much higher than those of the conventional Al alloys.

  3. Trial measurement of interfacial strength in multi-phase materials using micropillar compression tests

    Grant number:16K14412  2016.4 - 2018.3

    Takata Naoki

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    Authorship:Principal investigator 

    Grant amount:\3120000 ( Direct Cost: \2400000 、 Indirect Cost:\720000 )

    We have examined the compression response of single-crystal cylindrical micropillars with different diameters (approximately ranging from 1 to 10 micrometers) and shape parameters prepared on the sample surface of pure aluminum (Al) sheets. The compression tests for micropillars with various sizes demonstrated the flow stress of micropillars increases with decreasing pillar diameter. The compression response of micropillars with different d1/d2 (ratio of top diameter (d1) to bottom diameter (d2) of cylindrical micropillars) revealed higher d1/d2 than 0.5 is required for precisely measuring their strength. In order to evaluate the interfacial strength between metal and ceramics, the two-phase micropillars were prepared from Co/WC composites. These micropillars exhibit the strain burst at a fixed stress level.The measured stress level would correspond to the interfacial strength (stress level reqired for localized deformation in the vicinity of the interface).

  4. オーステナイト系耐熱鋼の強度に及ぼすγ-Fe母相/Fe2Nb強化相界面の役割

    2013.4 - 2016.3

    科学研究費補助金  若手研究(A)

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    Authorship:Principal investigator 

  5. 次世代火力発電プラント使用条件下におけるオーステナイト系耐熱鋼の変形機構

    2010.4 - 2012.3

    科学研究費補助金  若手研究(B)

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    Authorship:Principal investigator 

  6. 耐ロバスト性を有する軽量高比強度TiAl基鍛造合金の組織制御

    2007.4 - 2010.3

    科学研究費補助金  基盤研究(B)

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    Authorship:Coinvestigator(s) 

  7. 強ひずみ加工を必要としない超微細粒鉄鋼材料の創製とその高延性化

    2006 - 2008.3

    科学研究費補助金 

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    Authorship:Principal investigator 

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Industrial property rights 2

  1. アルミニウム合金材、その製造方法及びインペラ

    近藤 雅晶,杉山 知平,高田 尚記

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    Applicant:株式会社豊田自動織機,国立大学法人東海国立大学機構

    Application no:特願2020-33896(P2020-33896)  Date applied:2020.2

    Announcement no:特開2021-134413(P2021-134413A)  Date announced:2021.9

    Rights holder:株式会社豊田自動織機,国立大学法人東海国立大学機構   Country of applicant:Domestic   Country of acquisition:Domestic

  2. アルミニウム合金材、その製造方法及びインペラ

    近藤 雅晶,杉山 知平,佐藤 洋明,安藤 恭平,高田 尚記

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    Applicant:株式会社豊田自動織機,国立大学法人東海国立大学機構

    Application no:特願2019-53268(P2019-53268)  Date applied:2019.3

    Announcement no:2020-152965  Date announced:2020.9

    Publication no:特開2020-152965(P2020-152965A)  Date published:2020.9

    Rights holder:株式会社豊田自動織機,国立大学法人東海国立大学機構   Country of applicant:Domestic   Country of acquisition:Domestic

 

Teaching Experience (On-campus) 4

  1. 材料強度学

    2020

  2. 先端プロセス工学 I

    2020

  3. 構造材料及び演習

    2020

  4. 複合材料プロセス

    2020

Teaching Experience (Off-campus) 1

  1. 先端材料

    2017.4 Aichi Institute of Technology)

 

Social Contribution 10

  1. 岐阜北高校・出前講義

    Role(s):Lecturer

    岐阜北高校  出前講義  2022.6

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    Audience: High school students

    Type:Visiting lecture

  2. 愛知県立刈谷北高等学校 大学模擬授業

    Role(s):Lecturer

    愛知県立刈谷北高等学校  大学模擬授業  2021.10

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    Audience: High school students

    Type:Visiting lecture

  3. 愛知県立西尾高校2年生 出前講座

    Role(s):Lecturer

    西尾高校  2019.10

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    Audience: High school students

    Type:Visiting lecture

    マテリアル工学に関する講義

  4. 高校生おもしろ科学コンテスト

    Role(s):Lecturer

    愛媛県教育委員会  愛媛大学理学部  2018.11

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    Audience: High school students

    Type:Other

  5. 愛知県立岡崎北高校 学部・学科紹介・模擬講義

    Role(s):Lecturer

    岡崎北高校  岡崎北高校  2017.10

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    Audience: High school students

    Type:Visiting lecture

  6. 愛知県立五条高校 出前講義

    Role(s):Lecturer

    愛知県立五条高等学校  2017.7

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    Audience: High school students

  7. 愛知高校 出張講義

    Role(s):Lecturer

    愛知高校  大学・短期大学説明会  愛知高校  2017.7

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    Audience: High school students

    Type:Visiting lecture

  8. 愛知県立江南高校 模擬講義

    Role(s):Lecturer

    愛知県立江南高校  2017.6

  9. 愛知県立時習間高校 出張講義

    Role(s):Lecturer

    愛知県立時習間高校  2017.6

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    Audience: High school students

    Type:Visiting lecture

  10. 愛知県立五条高校 理系大学説明会 講師

    2016.7

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Media Coverage 1

  1. 超硬合金プレス金型作製 Newspaper, magazine

    日刊工業新聞  日刊工業新聞  21面  2022.3

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    Author:Other