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. |
入库方式: OAI收割
来源:金属研究所
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