中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Mechanically-induced grain coarsening in gradient nano-grained copper

文献类型:期刊论文

作者Chen, W. ; You, Z. S. ; Tao, N. R. ; Jin, Z. H. ; Lu, L.
刊名ACTA MATERIALIA
出版日期2017-02-15
卷号125页码:255-264
ISSN号1359-6454
关键词Gradient nano-grained copper Grain coarsening Grain boundary migration Non-diffusional kinetics Deformation mechanisms
通讯作者Lu, L (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China. ; Jin, ZH (reprint author), Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China.
中文摘要Gradient nano-grained Cu subjected to tensile tests yields at a stress almost twice of that of the conventional coarse-grained Cu at or below the room temperature. Beyond the yield stress, a uniform plastic strain of larger than 30% can be achieved, accompanied by homogeneous grain coarsening in nano-grained surface layer. The observed grain coarsening may induce certain degree of "strain softening". The measured grain coarsening rates strongly depend on temperature, stress and strain rate, suggesting that the grain coarsening is presumably limited by thermally activated dislocation activities at defective grain boundaries, rather than via diffusional process on atom-by-atom basis. A non-diffusional (source limited) Mott-Turnbull rate equation has been proposed to interpret the observed grain coarsening phenomenon. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
学科主题Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助信息National Science Foundation of China [51420105001, 51171181, 51371171, 51471172, 51401211]; Key Research Program of Frontier Sciences, CAS; National Basic Research Program of China (973 Program) [2012CB932202]
收录类别SCI
语种英语
公开日期2017-08-17
源URL[http://ir.imr.ac.cn/handle/321006/78289]  
专题金属研究所_中国科学院金属研究所
推荐引用方式
GB/T 7714
Chen, W.,You, Z. S.,Tao, N. R.,et al. Mechanically-induced grain coarsening in gradient nano-grained copper[J]. ACTA MATERIALIA,2017,125:255-264.
APA Chen, W.,You, Z. S.,Tao, N. R.,Jin, Z. H.,&Lu, L..(2017).Mechanically-induced grain coarsening in gradient nano-grained copper.ACTA MATERIALIA,125,255-264.
MLA Chen, W.,et al."Mechanically-induced grain coarsening in gradient nano-grained copper".ACTA MATERIALIA 125(2017):255-264.

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来源:金属研究所

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