2015 Fiscal Year Final Research Report
Suppression of low temperature irradiation embrittlement of low activation vanadium alloys by impurity state control
Project/Area Number |
25420889
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Nuclear fusion studies
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Research Institution | National Institute for Fusion Science |
Principal Investigator |
MUROGA Takeo 核融合科学研究所, ヘリカル研究部, 教授 (60174322)
|
Co-Investigator(Kenkyū-buntansha) |
NAGASAKA Takuya 核融合科学研究所, ヘリカル研究部, 准教授 (40311203)
HISHINUMA Yoshimitsu 核融合科学研究所, ヘリカル研究部, 准教授 (00322529)
|
Project Period (FY) |
2013-04-01 – 2016-03-31
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Keywords | バナジウム合金 / 照射脆化 / 不純物効果 / 照射相関 / 微細組織変化 / イオン照射 |
Outline of Final Research Achievements |
For the purpose of establishing evaluation and controlling methodology of impurity and irradiation induced embrittlement of fusion candidate V-4Cr-4Ti alloys, the effects of Y, as impurity getter, and the correlation of ion and neutron irradiation induced microstructures were investigated. It was shown, by systematic chemically controlled alloy production and testing, that Y addition can suppress the embrittlement by oxygen contamination. Potential loss of high temperature strength by Y addition can be mitigated by increasing Cr level. Correlation of ion and neutron irradiation induced microstructure was possible taking the radiation rate effects into consideration, enabling prediction of neutron irradiation effects based on ion irradiation data. However, the difference in the damage rate can cause different microstructural processes in the case that formation of dislocations and precipitates compete with each other.
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Free Research Field |
核融合炉材料
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