研究者詳細 - 小橋　眞

論文 - 小橋　眞

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レーザ粉末床溶融結合法によるAl-Si合金のレーザ条件最適化と組織・特性制御

鈴木飛鳥, 高田尚記, 小橋眞, 加藤正樹

粉体および粉末冶金 69 巻 ( 10 ) 頁： 417 - 425 2022年10月

Controllable tensile performance of additively manufactured Al-Fe alloy 査読有り

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

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 855 巻 2022年10月

粉末冶金に基づく金属表面でのメゾ構造制御とその金属/樹脂接合への応用

鈴木飛鳥, 高田尚記, 小橋眞

粉体工学会誌 59 巻 ( 10 ) 頁： 511 - 517 2022年10月

Aluminum matrix composites reinforced with multi-walled carbon nanotubes and C60 manufactured by laser powder bed fusion 査読有り国際共著

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

JOURNAL OF MATERIALS SCIENCE 57 巻 ( 38 ) 頁： 17984 - 17999 2022年10月

Enhancing the solid-state joinability of A5052 and CFRTP via an additively manufactured micro-structure 査読有り

Iwata, K; Suzuki, A; Kim, SG; Takata, N; Kobashi, M

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 306 巻 2022年8月

Microstructural Variations in Laser Powder Bed Fused Al-15%Fe Alloy at Intermediate Temperatures 査読有り

Wang, WY; Takata, N; Suzuki, A; Kobashi, M; Kato, M

MATERIALS 15 巻 ( 13 ) 2022年7月

Fast scanning calorimetry study of Al alloy powder for understanding microstructural development in laser powder bed fusion 査読有り

Takata, N; Liu, ML; Li, HM; Suzuki, A; Kobashi, M

MATERIALS & DESIGN 219 巻 2022年7月

耐用温度300°Cを実現する鋳造アルミニウム共晶合金の設計と組織形態制御

高田尚記, 岡野直輝, 相川宗也, 岡野大幹, 鈴木飛鳥, 小橋眞

軽金属 72 巻 ( 6 ) 頁： 381 - 387 2022年6月

レーザ粉末床溶融結合法によるAl-10%Si-0.4%Mg合金積層造形体の特異的な熱伝導率のイメージベース有限要素解析

鈴木飛鳥, 宮坂達也, 高田尚記, 小橋眞

軽金属 72 巻 ( 5 ) 頁： 164 - 171 2022年5月

応力発光体を用いた積層造形Al-12%Si合金ラティス構造体の圧縮変形挙動の観察

加藤正樹, 鈴木飛鳥, Matthew Mcmillan, Xiaoyang Liu, 高田尚記, 小橋眞

軽金属 72 巻 ( 5 ) 頁： 246 - 250 2022年5月

Negative strain rate sensitivity of yield strength of Al-Si alloy additive-manufactured using laser powder bed fusion 査読有り

Takata, N; Liu, ML; Suzuki, A; Kobashi, M; Kato, M

SCRIPTA MATERIALIA 213 巻頁： 114635 - 114635 2022年5月

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

Imaizumi, K; Fujita, A; Suzuki, A; Kobashi, M; Ozaki, K

MATERIALS & DESIGN 217 巻頁： 110651 - 110651 2022年5月

Microstructure and magnetocaloric property of homogeneous La (FexSi1-x)13 compounds fabricated by laser fusion using a powder mixture of Fe and LaySiz compounds 査読有り

Imaizumi, K; Fujita, A; Suzuki, A; Kobashi, M; Ozaki, K

JOURNAL OF ALLOYS AND COMPOUNDS 901 巻頁： 163706 - 163706 2022年4月

Improvement of magnetocaloric effect in La(FexSi1-x)13 by dealing with inhibitory microstructures at high Fe concentration 査読有り

Imaizumi, K; Fujita, A; Suzuki, A; Kobashi, M; Ozaki, K

ACTA MATERIALIA 227 巻頁： 117726 - 117726 2022年4月

計算状態図を基にした耐熱アルミニウム鍛造合金の設計と組織制御査読有り

高田尚記, 鈴木飛鳥, 小橋眞

まてりあ 61 巻 ( 4 ) 頁： 195 - 201 2022年4月

High-temperature strength sustained by nano-sized eutectic structure of Al-Fe alloy manufactured by laser powder bed fusion 査読有り

Wang, WY; Takata, N; Suzuki, A; Kobashi, M; Kato, M

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 838 巻頁： 142782 - 142782 2022年3月

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

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

Journal of Japan Institute of Light Metals 72 巻 ( 3 ) 頁： 79 - 87 2022年3月

Change in microstructural characteristics of laser powder b e d fuse d Al-Fe binary alloy at elevated temperature 査読有り

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

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 97 巻頁： 38 - 53 2022年1月

Influence of Added Fourth Elements on Precipitation in Heat-Resistant Al-Mg-Zn Ternary Alloys 査読有り

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

MATERIALS TRANSACTIONS 63 巻 ( 4 ) 頁： 513 - 521 2022年

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

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

Keikinzoku/Journal of Japan Institute of Light Metals 72 巻 ( 5 ) 頁： 178 - 184 2022年

掲載種別：研究論文（学術雑誌）

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

DOI： 10.2464/jilm.72.178

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