Effects of Transmutation Elements on Neutron Irradiation Hardening of Tungsten
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- Tanno Takashi
- Department of Quantum Science and Energy Engineering, Faculty of Engineering, Tohoku University
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- Hasegawa Akira
- Department of Quantum Science and Energy Engineering, Faculty of Engineering, Tohoku University
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- He Jian-Chao
- Department of Quantum Science and Energy Engineering, Faculty of Engineering, Tohoku University
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- Fujiwara Mitsuhiro
- Department of Quantum Science and Energy Engineering, Faculty of Engineering, Tohoku University
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- Nogami Shuhei
- Department of Quantum Science and Energy Engineering, Faculty of Engineering, Tohoku University
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- Satou Manabu
- Department of Quantum Science and Energy Engineering, Faculty of Engineering, Tohoku University
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- Shishido Toetsu
- Institute for Materials Research, Tohoku University
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- Abe Katsunori
- Department of Quantum Science and Energy Engineering, Faculty of Engineering, Tohoku University
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Tungsten (W) is a candidate material for Plasma facing materials of fusion reactors. During fusion reactor operation, not only irradiation damages but also transmutation elements such as rhenium (Re) and osmium (Os) are produced by neutron irradiation. As a result, the original pure tungsten changes to W-Re or W-Re-Os alloys. Thus, the mechanical and physical properties are expected to change. The aim of this study is to investigate the effects of transmutation elements on neutron irradiation hardening and microstructure changes of tungsten.<BR>To simulate the effects of transmutation elements, tungsten base model alloys were used in this study. The examined compositions of the alloys were selected from the calculated changes in solid solution area of W-Re-Os alloy. Neutron irradiation was performed in fast test reactor JOYO in JAEA. The irradiation damages and temperature ranges were 0.17–1.54 dpa and 400–750°C respectively. After the irradiation, Vickers hardness test and TEM observation were performed.<BR>There were clear differences between Re and Os in effects on irradiation hardening. In the case of W-Re alloys, when damages were less than 0.40 dpa, the irradiation hardenings were nearly equal to those of pure tungsten independent of Re addition. But when the damage was 1.54 dpa, the irradiation hardenings increased lineally with Re content. Microstructural observations showed that precipitations mainly formed in W-Re alloys. In the case of W-Os alloys, the irradiation hardenings (ΔHv) of W-3Os alloys were larger than those of pure tungsten. And the differences were about 400 independent of dpa and irradiation temperature. Effects of Re and Os on irradiation hardening based on the microstructural observations were discussed.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 48 (9), 2399-2402, 2007
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001204250045312
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- NII論文ID
- 10019853622
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 8885190
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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