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

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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)
刊名	Materials Science & Engineering A
	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
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.
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
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
内容类型	期刊论文
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.