2011 Fiscal Year Final Research Report
Examination of the origin of the peculiar anomalous strengthening behavior appeared in some Ni-solid solution alloys
| Project/Area Number |
22760540
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural/Functional materials
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| Research Institution | Osaka University |
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Principal Investigator |
HAGIHARA Koji 大阪大学, 大学院・工学研究科, 准教授 (10346182)
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| Project Period (FY) |
2010 – 2011
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| Keywords | 短範囲規則構造(SRO) / 異常強化 / 塑性変形 / Ni基超合金 / 転位 / 単結晶 / 高温変形 / TEM |
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| Research Abstract |
We examined the plastic deformation behavior of Ni-22Cr-8W(at.%), Ni-8W, and Ni-5Re Ni-solid solution alloy single crystals. We first found that yield stress anomaly(YSA) appears in Ni-22Cr-8W(at.%) and Ni-8W single crystals in which the solute atoms form the short-range ordered(SRO) structure. The peak temperature of the YSA is considered to be related to the thermal stability of the SRO. The control of SRO has a potential to improve the high-temperature strength of the materials by inducing the deformation behavior different from those in solid-solution alloys and fully ordered alloys.
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Research Products
(5 results)
