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10.1016_j.nme.2018.08.003.pdf1.25 MBAdobe PDF見る/開く
タイトル: Investigation of mechanical properties of stress-relieved and electron-irradiated tungsten after hydrogen charging
著者: Sato, K.
Yamashita, H.
Hirosako, A.
Komazaki, S.
Xu, Q.
Onoue, M.
Kasada, R.
Yabuuchi, K.
Kimura, A.
著者名の別形: 徐, 虬
藪内, 聖皓
木村, 晃彦
キーワード: Tungsten
Hydrogen
Hardness
Tensile test
Defects
Electron irradiation
発行日: Dec-2018
出版者: Elsevier BV
誌名: Nuclear Materials and Energy
巻: 17
開始ページ: 29
終了ページ: 33
抄録: The effect of hydrogen on the hardness and tensile properties of pure tungsten was examined using Vickers hardness and tensile tests. Samples were exposed to high-pressure hydrogen gas (5.8 MPa). The tensile behavior, tensile fracture surface, and hardness of as-received and stress-relieved tungsten did not change after hydrogen charging, owing to the low solubility of hydrogen. Therefore, to understand the effect of hydrogen on these materials, experiments must be performed to trap more hydrogen atoms at dislocations. In contrast, the hardness of electron-irradiated tungsten increased after hydrogen charging. Additionally, after a heat treatment at 473 K, hydrogen atoms dissociated from single vacancies, and the hardness decreased to the pre-charged value. Thus, single vacancies decorated with hydrogen atoms are expected to obstruct dislocation motion.
著作権等: © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).
URI: http://hdl.handle.net/2433/235017
DOI(出版社版): 10.1016/j.nme.2018.08.003
出現コレクション:学術雑誌掲載論文等

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