High-Temperature Helium Embrittlement of 316FR Steel
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概要
- 論文の詳細を見る
The helium embrittlement behavior of 316FR austenitic stainless steel was investigated by a tensile test at 750°C using miniature tensile specimens, which were helium-implanted below 100°C up to 5, 30, and 100 appm using a cyclotron accelerator, and were post-implantation-annealed at 750°C for 10 and 100 h. The helium-implanted specimens showed a fully intergranular fracture regardless of the helium concentration and annealing time. No microstructural changes in the as-implanted specimen up to 30 appm and formation of a small number of helium bubbles due to the post-implantation annealing were observed. The gradual release of the helium during the tensile test started after the yielding, and a sharp peak of the helium release was detected in the final fracture phase. The total number of helium atoms released was strongly dependent on the implanted helium concentration, rather than on the annealing time.
著者
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NOGAMI Shuhei
Department of Quantum Science and Energy Engineering, Tohoku University
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HASEGAWA Akira
Department of Quantum Science and Energy Engineering, Tohoku University
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TANNO Takashi
Department of Quantum Science and Energy Engineering, Tohoku University
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IMASAKI Kazuto
Department of Quantum Science and Energy Engineering, Tohoku University
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ABE Kazuma
Department of Quantum Science and Energy Engineering, Tohoku University
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