| Project Area | Bulk Nanostructured Metals -New Metallurgy of Novel Structural Materials |
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| Project/Area Number |
22102006
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
KATO Masaharu 東京工業大学, 総合理工学研究科(研究院), 教授 (50161120)
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| Co-Investigator(Kenkyū-buntansha) |
ONAKA Susumu 東京工業大学, 総合理工学研究科, 教授 (40194576)
TOMOTA Yo 茨城大学, 理工学研究科, 名誉教授 (90007782)
TANAKA Masaki 九州大学, 工学研究院, 准教授 (40452809)
KAMIKAWA Naoya 東北大学, 金属材料研究所, 助教 (30530894)
KANEKO Yoshihisa 大阪市立大学, 工学研究科, 教授 (40283098)
ビノグラドフ アレクセイ 大阪市立大学, 大学院・工学研究科, 准教授 (10283102)
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| Co-Investigator(Renkei-kenkyūsha) |
FUJII Toshiyuki 東京工業大学, 理工学研究科, 教授 (40251665)
MIYAJIMA Yoji 東京工業大学, 総合理工学研究科, 助教 (80506254)
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| Project Period (FY) |
2010-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥313,690,000 (Direct Cost: ¥241,300,000、Indirect Cost: ¥72,390,000)
Fiscal Year 2014: ¥54,340,000 (Direct Cost: ¥41,800,000、Indirect Cost: ¥12,540,000)
Fiscal Year 2013: ¥52,000,000 (Direct Cost: ¥40,000,000、Indirect Cost: ¥12,000,000)
Fiscal Year 2012: ¥67,990,000 (Direct Cost: ¥52,300,000、Indirect Cost: ¥15,690,000)
Fiscal Year 2011: ¥62,790,000 (Direct Cost: ¥48,300,000、Indirect Cost: ¥14,490,000)
Fiscal Year 2010: ¥76,570,000 (Direct Cost: ¥58,900,000、Indirect Cost: ¥17,670,000)
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| Keywords | バルクナノメタル / 超微細結晶粒 / 力学特性 / 結晶粒界 / 転位 / 熱活性化変形過程 / 構造材料 / 結晶欠陥 / 物性実験 / 力学物性 |
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| Outline of Final Research Achievements |
Bulk nanostructured metals (BNMs) with grain size smaller than 1 micrometer are known to be much stronger than conventional metals whose grain size is usually larger than 10 micrometers. In addition, BNMs show various characteristic mechanical properties in ductility, fracture, fatigue properties, etc.
These mechanical properties of BNMs were investigated in detail and deformation and fracture mechanisms were discussed both experimentally and theoretically. It has been found that the effects of grain boundaries on the formation and motion of dislocations play an essential role in the mechanical response of BNMs. The internal structure of BNMs was investigated by using, for example, a synchrotron radiation facility. Many new experimental results, such as the change in dislocation density during plastic deformation of a copper BNM, were obtained for the first time in the world.
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