The effects of post-irradiation isochronous annealing on defects evolution and hardening in Hastelloy N alloy
Liu, Jizhao1,2,3; Huang, Hefei1,2; Liu, Awen1,3; Li, Yan1,2,3
2021
Source PublicationJOURNAL OF NUCLEAR MATERIALS
ISSN0022-3115
EISSN1873-4820
Volume548
Status已发表
DOI10.1016/j.jnucmat.2021.152855
Abstract

The nickel-based Hastelloy N alloy samples were implanted with helium ions at room temperature and then annealed at 600 degrees C (sample S-2), 800 degrees C (sample S-3) and 900 degrees C (sample S-4) for 1 hour, respectively. The effects of post-irradiation isochronous annealing on defects evolution and hardening in the alloy were investigated by transmission electron microscopy (TEM) and nanoindenter. TEM characterization shows that the mean diameter and number density of helium bubbles in sample S-2 keep unchanged. It is found that the increments of helium bubbles size in samples S-3 and S-4 are mainly caused by migration and coalescence (MC) and Ostwald ripening (OR) mechanisms, respectively. Additionally, the MC mechanism can promote the formation of dislocation loops due to matrix atoms diffusion. In sample S-4, the recovery effects of defects are striking, resulting in a significant reduction in the number density of dislocation loops. The values of Vac. / He. at different regions have been calculated to explain the size variation of helium bubbles in all the samples. Moreover, nanohardness increments calculated by dispersed barrier hardening (DBH) model agree with those measured by nanoindentation. (C) 2021 Elsevier B.V. All rights reserved.

KeywordHastelloy N alloy Isochronous annealing effects Defects evolution Coarsening mechanism Irradiation hardening
Indexed BySCIE
Language英语
WOS Research AreaMaterials Science ; Nuclear Science & Technology
WOS SubjectMaterials Science, Multidisciplinary ; Nuclear Science & Technology
WOS IDWOS:000635060500005
PublisherELSEVIER
Original Document TypeArticle
Citation statistics
Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://kms.shanghaitech.edu.cn/handle/2MSLDSTB/126218
Collection物质科学与技术学院_硕士生
物质科学与技术学院_特聘教授组_李燕组
物质科学与技术学院_博士生
Affiliation1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China;
2.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China;
3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
First Author AffilicationSchool of Physical Science and Technology
Recommended Citation
GB/T 7714
Liu, Jizhao,Huang, Hefei,Liu, Awen,et al. The effects of post-irradiation isochronous annealing on defects evolution and hardening in Hastelloy N alloy[J]. JOURNAL OF NUCLEAR MATERIALS,2021,548.
APA Liu, Jizhao,Huang, Hefei,Liu, Awen,&Li, Yan.(2021).The effects of post-irradiation isochronous annealing on defects evolution and hardening in Hastelloy N alloy.JOURNAL OF NUCLEAR MATERIALS,548.
MLA Liu, Jizhao,et al."The effects of post-irradiation isochronous annealing on defects evolution and hardening in Hastelloy N alloy".JOURNAL OF NUCLEAR MATERIALS 548(2021).
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