Capture capability of different intrinsic structures for helium bubbles in micro-nano composite 304L steels

Zhiying Gao; Jia Huang; Haocheng Liu; Wei Ge; Yue Su; Fengping Luo; Guoying Liu; Tongde Shen; Jianming Xue; Yugang Wang; Chenxu Wang

Nuclear Materials and Energy (Sep 2022)

Capture capability of different intrinsic structures for helium bubbles in micro-nano composite 304L steels

Zhiying Gao,
Jia Huang,
Haocheng Liu,
Wei Ge,
Yue Su,
Fengping Luo,
Guoying Liu,
Tongde Shen,
Jianming Xue,
Yugang Wang,
Chenxu Wang

Affiliations

Zhiying Gao: State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
Jia Huang: State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
Haocheng Liu: State Power Investment Corporation Research Institute, Beijing 102209, China
Wei Ge: State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
Yue Su: State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
Fengping Luo: State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
Guoying Liu: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
Tongde Shen: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
Jianming Xue: State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
Yugang Wang: State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
Chenxu Wang: State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, Peking University, Beijing 100871, China; Corresponding author.

Journal volume & issue: Vol. 32
p. 101224

Abstract

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The formation and migration of helium bubbles lead to performance degradation of structural materials in nuclear reactors. Intrinsic structures in nuclear materials can significantly influence the behavior and distribution of these helium bubbles under irradiation. Micro-nano composite 304L stainless steel (MN304-La) possesses three main kinds of intrinsic structures: grain boundaries (GBs), dislocations, and La-rich nano-precipitates (NPs). In this study, the helium bubbles on different intrinsic structures in MN304-La after He+ ions implantation were characterized and analyzed. We compared the capabilities of different intrinsic structures in capturing helium bubbles and confirmed that NPs exhibit the strongest strength in capturing helium bubbles among the three kinds of intrinsic structures. We found that the competition of intrinsic structures for capturing helium bubbles depends on both the capture strength of the intrinsic structures and the capture distance to the helium bubbles.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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