著者

小野寺 秀博 阿部 太一 下野 昌人 小山 敏幸

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.100, no.10, pp.1207-1219, 2014 (Released:2014-09-30)

参考文献数

116

被引用文献数

2 3

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Computational materials science is an exciting field which holds much future potential. In this article, at first, the dramatic advances of the computational methodologies are briefly summarized at scales from the atomistic to macroscopic levels. Then, each coauthor introduces the three research fields in detail, (1) CALPHAD modeling supported by key experiments and first-principles calculation, (2) Studies on the phase transformation in alloys based on the MD simulations, and (3) Predictions of the microstructure evolution and the mechanical properties based on the phase-field method, where remarkable progresses have been attained.

著者

小山 敏幸

出版者

公益社団法人 日本金属学会

雑誌

日本金属学会誌 (ISSN:00214876)

巻号頁・発行日

vol.73, no.12, pp.891-905, 2009 (Released:2009-12-01)

参考文献数

50

被引用文献数

3 8

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The phase-field method has recently been extended and utilized across many fields in materials science. Since this method can systematically incorporate the effect of coherent strain induced by lattice mismatch and applied stress as well as external electric and magnetic fields, it has been applied to many material processes including solidification, solid-state phase transformations and various types of complex microstructure changes.    In this paper, firstly the calculation method of phase-field approach is briefly explained. In particular, the basic philosophy of phase-field simulation is mentioned. Secondly, we summarize the recent calculation results of the phase-field simulation of phase transformations in Fe-based alloys and Ni (or Co)-based superalloys. Finally, the image-based calculation of materials properties is explained, where the simulated microstructure image that is the output data of phase-field simulation is employed as a boundary condition for calculating the materials property, and we show the cases of the mechanical property (stress-strain curve), magnetic property (ferromagnetic hysteresis) and electric property (ferroelectric hysteresis) as typical examples of this approach.

著者

小山 敏幸

出版者

明星大学人文学部社会学科

雑誌

明星大学研社会学科研究報告

巻号頁・発行日

vol.5, pp.64-74, 1973-03-24

著者

鶴田 健二 小山 敏幸 尾形 修司 兵頭 志明

出版者

岡山大学

雑誌

特定領域研究

巻号頁・発行日

2007

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本特定領域研究を通して, 複数の空間スケールをつなぐ新しいシミュレーション手法・アルゴリズムを開発・高度化し, 機能元素材料科学の学理構築に資する新しい計算科学手法・ツール開発を大きく進展させた。また, ナノ計測班ならびにプロセス班との連携において, 本領域における共通試料であるアルミナの転位・粒界構造の微視的構造と電子状態, 元素偏析の安定性と局所電子状態の定量的解明に上記新規手法を適用し, その適用性を実証した。