Effects of grain boundaries and nano-precipitates on helium bubble behaviors in lanthanum-doped nanocrystalline steel

被引：17

作者：

Liu, Haocheng ^{[1
]}

Huang, Jia ^{[1
]}

Wang, Chenxu ^{[1
]}

Xia, Songqin ^{[1
]}

Ge, Wei ^{[1
]}

Liu, Qingyuan ^{[1
]}

Su, Yue ^{[1
]}

Gao, Zhiying ^{[1
]}

Zhao, Shuang ^{[1
]}

Du, Congcong ^{[2
]}

Cao, Liuxuan ^{[3
]}

Shen, Tongde ^{[2
]}

Wang, Yugang ^{[1
]}

机构：

[1] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[2] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China

[3] Xiamen Univ, Coll Energy, Xiamen 361102, Peoples R China

来源：

SCRIPTA MATERIALIA | 2021年 / 200卷

基金：

中国国家自然科学基金;

关键词：

Nanocrystalline steel; Grain boundary; Nano-precipitate; He bubble; ODS FERRITIC STEELS; RADIATION-DAMAGE; ION-IRRADIATION; BROWNIAN-MOTION; METALS; HE; RESISTANCE; STABILITY; EVOLUTION; ALLOYS;

D O I：

10.1016/j.scriptamat.2021.113900

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Helium accumulation in advanced nuclear systems would accelerate the failure of structural materials. Nanostructured materials have the potential to mitigate helium effects by providing more nucleation sites for He bubbles. La-doped nanocrystalline 304 austenitic stainless steel (NC304-La) possesses ultrafine and stable nano-grains similar to 45 nm in diameter and high-density fine nano-precipitates. In this work, we implanted NC304-La with helium ions, then annealed at different temperatures after implantation. We found that combining the key features of nanocrystalline steels and oxide dispersion-strengthened steels, NC304-La showed excellent bubble swelling resistance. We characterized the interaction between He bubbles and the two features in NC304-La: grain boundaries and nano-precipitates. Through detailed study for the heat-treatment related behaviors of He bubbles in this multi-sink system, the mechanisms of He bubble coarsening resistance in NC304-La were proposed. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页数：6

共 3 条

[1] Effects of local structure on helium bubble growth in bulk and at grain boundaries of bcc iron: A molecular dynamics study
Yang, L.
Gao, F.
Kurtz, R. J.
Zu, X. T.
Peng, S. M.
Long, X. G.
Zhou, X. S.
ACTA MATERIALIA, 2015, 97 : 86 - 93
[2] Parallel three-dimensional Monte Carlo simulations for effects of precipitates and sub-boundaries on abnormal grain growth of Goss grains in Fe-3% Si steel
Park, Chang-Soo
Na, Tae-Wook
Kang, Jul-Ki
Lee, Byeong-Joo
Han, Chan-Hee
Hwang, Nong-Moon
PHILOSOPHICAL MAGAZINE, 2013, 93 (34) : 4198 - 4212
[3] Molecular dynamics studies of helium bubble effects on grain boundary fracture vulnerabilities in an Fe70Ni11Cr19-1%H austenitic stainless steel
Zhou, X. W.
Foster, M. E.
Sills, R. B.
JOURNAL OF NUCLEAR MATERIALS, 2022, 565

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