| A physical model revealing strong strain hardening in nano-grained metals induced by grain size gradient structure | |
Li JJ(李建军); Chen SH(陈少华) ; Wu XL(武晓雷); Su AJ(苏爱嘉); Li, JJ (reprint author), Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Dept Engn Mech, Xian 710129, Shanxi, Peoples R China.
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| Source Publication | Materials Science & Engineering A
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| 2015-01-03 | |
| Volume | 620Pages:16-21 |
| ISSN | 0921-5093 |
| Abstract | 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. |
| Keyword | Grain Size Gradient Structure Extra Strain Hardening Ductility Geometrically Necessary Dislocations Nano-grained Metal |
| DOI | 10.1016/j.msea.2014.09.117 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000346453100003 |
| WOS Keyword | SHEAR-COUPLED MIGRATION ; NANOCRYSTALLINE MATERIALS ; CRYSTAL PLASTICITY ; NANOTWINNED METALS ; TENSILE DUCTILITY ; SURFACE-LAYER ; DEFORMATION ; DISLOCATION ; COPPER ; MICROSTRUCTURE |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Organization | 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. |
| Department | LNM仿生材料与固体的微尺度力学 |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/49372 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Li, JJ (reprint author), Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Dept Engn Mech, Xian 710129, Shanxi, Peoples R China. |
| Recommended Citation 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,&Li, JJ .(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. |
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