2013 Fiscal Year Final Research Report
Study on texture memory effect in nickel aluminide
| Project/Area Number |
23560886
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
DEMURA Masahiko 独立行政法人物質・材料研究機構, 水素利用材料ユニット, 主任研究員 (10354177)
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| Co-Investigator(Kenkyū-buntansha) |
II Seiichiro 独立行政法人物質・材料研究機構, 元素戦略材料センター, 主任研究員 (60435146)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 結晶・組織制御 / 再結晶・粒成長集合組織 / 金属間化合物 / ニッケルアルミナイド / 強圧延 / 単結晶 / 結晶方位解析 / 複相 |
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| Research Abstract |
A sharp texture of heavily cold-rolled nickel aluminide single crystals is disintegrated in an early stage of annealing, but it finally returns to the sharp texture, which is very similar to that in the cold-rolled state. This interesting phenomenon is termed as texture memory effect. Recently, we found that no texture memory effect occurs in two-phase alloys, where the nickel aluminide is coherently precipitated in a nickel solid-solution matrix. This study aimed to clarify factors necessary for the occurrence of the texture memory effect.
Firstly, we confirmed that no texture memory effect occurs in a nickel solid-solution single phase. Based on the electron microscopic analyses, we concluded that there are two requisites for the occurrence of the texture memory effect: (1) enough strain is accumulated in the cold rolling process and (2) grain boundary move freely with no obstacles like intereface.
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[Remarks] Demura M. 方位を記憶する金属 東京理科大学基礎工学部特別講義 2012(2013年度記載) 特別講義、招聘セミナー等
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[Remarks] Demura M. Development of thin foils of intermetallic Ni_3Al : cold-rolling, recrystallization and texture memory effect. Shandong University Seminar, 2011 特別講義、招聘セミナー等
