| 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 |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
MUROGA Takeo 核融合科学研究所, ヘリカル研究部, 教授 (60174322)
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| 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)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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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 / 中性子照射 / 微細組織発達 / 転位ループ / イットリウム添加 / 高温引張強度 / クリープ強度 / 衝撃特性 |
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| 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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