A physical model revealing strong strain hardening in nano-grained metals induced by grain size gradient structure

doi:10.1016/j.msea.2014.09.117

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	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.
发表期刊	Materials Science & Engineering A
	2015-01-03
卷号	620 页码:16-21
ISSN	0921-5093
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.
关键词	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
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000346453100003
关键词[WOS]	SHEAR-COUPLED MIGRATION ; NANOCRYSTALLINE MATERIALS ; CRYSTAL PLASTICITY ; NANOTWINNED METALS ; TENSILE DUCTILITY ; SURFACE-LAYER ; DEFORMATION ; DISLOCATION ; COPPER ; MICROSTRUCTURE
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
项目资助者	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.
课题组名称	LNM仿生材料与固体的微尺度力学
论文分区	一类
引用统计	被引频次：51[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/49372
专题	非线性力学国家重点实验室
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.
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,&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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