2010 Fiscal Year Final Research Report
Strengthening and toughening of metallic materials by size invariant deformation with an ultra large strain gradient and the clarification of its mechanism
| Project/Area Number |
20246103
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Toyohashi University of Technology |
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Principal Investigator |
UMEMOTO Minoru Toyohashi University of Technology, 大学院・工学研究科, 教授 (90111921)
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| Co-Investigator(Kenkyū-buntansha) |
TODAKA Yoshikazu 豊橋技術科学大学, 大学院・工学研究科・機械工学専攻, 准教授 (50345956)
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| Co-Investigator(Renkei-kenkyūsha) |
THUCHIYA Koichi 独立行政法人物質・材料研究機構, ハイブリッド材料センター, 研究員 (50236907)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 金属 / 巨大ひずみ / 強度 / 延性 / 歪勾配 / 高圧相 / ナノ結晶 / 変態 |
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| Research Abstract |
The present research aimed to make clear the method to produce metallic materials with high strength and good ductility by applying shape invariant deformation with a large strain gradient. In pure Ti and pure Zr, it was made clear that such deformation enhance to retain high strength high pressure phase at ambient condition. It was proposed that the two phase structure with high strength high pressure ω phase and ductile α phase can be a good candidate for the high strength-high ductile materials. In austenitic stainless steels, it was shown that high strength-high ductility can be achieved by grain refinement strengthening and nano-size precipitation strengthening and transformation plasticity.
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Research Products
(50 results)
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[Journal Article] Severe pastic deformation of Zr-Cu-Al metallic glass in As-cast and crystallized conditions, Processing and Fabrication Advanced Materials- XVIII2009
Author(s)
K.Tsuchiya, S.Yamamoto, Y.Yokoyama, H.Kato, Y Todaka, M.Umemoto
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Journal Title
eds : M.Niinomi, M.Morinaga, M.Nakai, N.Bhatnagar, T.S.Srivatsan Vol.4
Pages: 1865-1874
Peer Reviewed
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[Journal Article] Formation of ultrafine-grained structure at worn surface in carbon steel by wearing process, Processing and Fabrication Advanced Materials-XVIII2009
Author(s)
K.Koujina, Y Todaka, T.Yakushiji, H.Nagai, Y.Iguchi, M.Umemoto
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Journal Title
eds : M.Niinomi, M.Morinaga, M.Nakai, N.Bhatnagar, T.S.Srivatsan Vol.4
Pages: 1925-1932
Peer Reviewed
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