A physical model revealing strong strain hardening in nano-grained metals induced by grain size gradient structure
文献类型：期刊论文
| 作者 | Li JJ(李建军); Chen SH(陈少华) ; Wu XL(武晓雷); Su AJ(苏爱嘉)
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| 刊名 | Materials Science & Engineering A
 |
| 出版日期 | 2015-01-03 |
| 卷号 | 620页码:16-21 |
| 关键词 | Grain size gradient structure Extra strain hardening Ductility Geometrically necessary dislocations Nano-grained metal |
| ISSN号 | 0921-5093 |
| 产权排序 | [Li, Jianjun] Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Dept Engn Mech, Xian 710129, Shanxi, Peoples R China; [Chen, Shaohua; Wu, Xiaolei] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; [Soh, A. K.] Monash Univ Malaysia, Sch Engn, Bandar Sunway, Salangor, Malaysia |
| 通讯作者 | Li, JJ (reprint author), Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Dept Engn Mech, Xian 710129, Shanxi, Peoples R China. |
| 合作状况 | 国内 |
| 中文摘要 | A theoretical model has been developed, which reveals the underlying correlation between the strong extra strain hardening achieved in the nano-grained layers of the grain size gradient structure and the non-uniform deformation of the lateral surface in surface nano-crystallized materials, based on some existing experimental observations and the concept of geometrically necessary dislocations. The proposed model led to the establishment of a simple physical law that can be expressed as H⁎=A⁎, where H⁎ and A⁎ are two dimensionless parameters. The former represents the extra strain hardening, while the latter characterizes the non-uniform deformation of the lateral surface. The values of these two parameters can be measured through experiments. |
| 分类号 | 一类 |
| 类目[WOS] | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 研究领域[WOS] | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 关键词[WOS] | SHEAR-COUPLED MIGRATION ; NANOCRYSTALLINE MATERIALS ; CRYSTAL PLASTICITY ; NANOTWINNED METALS ; TENSILE DUCTILITY ; SURFACE-LAYER ; DEFORMATION ; DISLOCATION ; COPPER ; MICROSTRUCTURE |
| 收录类别 | SCI ; EI |
| 资助信息 | This work was supported by the National Natural Science Foundation of China (NSFC) (11402203), the Fundamental Research Funds for the Central Universities (3102014JCQ01039) and the Start-up Funds for the Newly-recruited High-level Talents from Northwestern Polytechnical University, China. S.C. thanks the support from NSFC through Grants #11125211, #11372317 and the 973 Nano-project (2012CB937500). A.K. Soh acknowledges the support of the Advanced Engineering Programme and School of Engineering, Monash University Malaysia, as well as the eScience Grant (Project no.: 06-02-10-SF0195) provided by the Ministry of Science, Technology and Innovation (MOSTI), Malaysia. |
| 原文出处 | http://dx.doi.org/10.1016/j.msea.2014.09.117 |
| 语种 | 英语 |
| WOS记录号 | WOS:000346453100003 |
| 公开日期 | 2014-12-16 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/49372]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li JJ,Chen SH,Wu XL,et al. A physical model revealing strong strain hardening in nano-grained metals induced by grain size gradient structure[J]. Materials Science & Engineering A,2015,620:16-21. |
| APA | Li JJ,Chen SH,Wu XL,&Su AJ.(2015).A physical model revealing strong strain hardening in nano-grained metals induced by grain size gradient structure.Materials Science & Engineering A,620,16-21. |
| MLA | Li JJ,et al."A physical model revealing strong strain hardening in nano-grained metals induced by grain size gradient structure".Materials Science & Engineering A 620(2015):16-21. |
入库方式： OAI收割
来源：力学研究所
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