中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
In-situ study of initiation and extension of nano-thick defect-free channels in irradiated nickel

文献类型:期刊论文

作者Li, Shihao1,5; Gao, Ning2,3,4; Han, Weizhong1
刊名JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
出版日期2020-12-01
卷号58页码:114-119
关键词Defect-free channel Dislocation loop In-situ Strain localization
ISSN号1005-0302
DOI10.1016/j.jmst.2020.03.057
通讯作者Gao, Ning(ning.gao@sdu.edu.cn) ; Han, Weizhong(wzhanxjtu@mail.xjtu.edu.cn)
英文摘要Radiation defects-induced plastic flow localization is the origin of loss of ductility in irradiated metals. Defect-free channels (DFCs) are a typical form of strain localization that lead to crack initiation and premature failure. A comprehensive understanding of the DFC dynamics is key to managing radiation boosted property degradation. Despite great research efforts, a clear mechanism of DFC remains unknown. Here, our in-situ tests on irradiated Ni pillars provide a real-time observation of the dynamics of DFCs, including DFC initiation, extension and thickening. The merging and spreading of dislocation loops serve as an alternative mechanism of dislocation sources that emit massive dislocations and initiate nano-thick DFCs inside the grain. Nano-thick DFCs were formed through chopping up or sweeping away of loops by mobile dislocations. Annihilation of opposite loops and interactions between loops and vacancies accelerate DFC extension. Activation of multiple dislocation sources and dislocation cross-slips are the mechanisms for DFC thickening. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
WOS关键词PRISMATIC DISLOCATION LOOPS ; ODS FERRITIC STEELS ; RADIATION-DAMAGE ; DYNAMICS ; DEFORMATION ; MICROSTRUCTURE ; MECHANISMS ; DEPENDENCE ; EVOLUTION ; ALLOYS
资助项目National Natural Science Foundation of China[51922082] ; National Natural Science Foundation of China[51971170] ; National Natural Science Foundation of China[51942104] ; National Natural Science Foundation of China[11675230] ; National Key Research and Development Program of China[2017YFB0702301] ; 111 Project of China[BP2018008]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000574648800015
出版者JOURNAL MATER SCI TECHNOL
资助机构National Natural Science Foundation of China ; National Key Research and Development Program of China ; 111 Project of China
源URL[http://119.78.100.186/handle/113462/139684]  
专题中国科学院近代物理研究所
通讯作者Gao, Ning; Han, Weizhong
作者单位1.Xi An Jiao Tong Univ, Ctr Adv Mat Performance Nanoscale, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
3.Shandong Univ, Key Lab Particle Phys & Particle Irradiat, Qingdao 266237, Peoples R China
4.Shandong Univ, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Peoples R China
5.Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
推荐引用方式
GB/T 7714
Li, Shihao,Gao, Ning,Han, Weizhong. In-situ study of initiation and extension of nano-thick defect-free channels in irradiated nickel[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,58:114-119.
APA Li, Shihao,Gao, Ning,&Han, Weizhong.(2020).In-situ study of initiation and extension of nano-thick defect-free channels in irradiated nickel.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,58,114-119.
MLA Li, Shihao,et al."In-situ study of initiation and extension of nano-thick defect-free channels in irradiated nickel".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 58(2020):114-119.

入库方式: OAI收割

来源:近代物理研究所

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