| Project/Area Number |
23656446
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Material processing/treatments
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NISHIYAMA Hiroaki 山形大学, 大学院・工学研究科, 准教授 (80403153)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 転位 / 析出 / Ti-Al合金 / 微細加工 / リソグラフィー / 相分離 / 塑性ひずみ / 相変態 / チタンーアルミ合金 / 層状組織 / 選択溶解 / 核生成・成長 |
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| Research Abstract |
Owing to the technologies for micromanufacturing and micromechanical testing, such as lithography and nano-indentation, the length scale of controllable heterogeneity has become comparable to that of microstructures formed by precipitation. In our study, three kinds of nanoplastic deformation methods including nano-imprinting, nano-indentation, and nanogrooving were conducted to produce local nanostrain on the supersaturated Ti3Al single crystals, focusing on the formation of periodic, parallel, basal dislocation bands with relatively high density. The effects of fine antiphase domains on the formation and motion of dislocations during nanoplastic deformation and the formation of plastic zone by combination of three kinds of slip systems were examined. The effect of the dislocation band produced by nanogrooving on the precipitation of gamma lamellae was also investigated.
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