The Evolution of Strain Gradient and Anisotropy in Gradient-Structured Metal

doi:10.1007/s11661-017-4199-2

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	The Evolution of Strain Gradient and Anisotropy in Gradient-Structured Metal
	Bian XD(卞祥德); Yuan FP(袁福平); Wu XL(武晓雷); Zhu, Yuntian; Yuan, FP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
刊名	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
	2017-09-01
卷号	48A 期号:9 页码:3951-3960
ISSN号	1073-5623
DOI	10.1007/s11661-017-4199-2
文献子类	Article
英文摘要	Gradient-structured metals have been reported to possess superior mechanical properties, which were attributed to their mechanical heterogeneity. Here we report in-situ observation of the evolution of strain gradient and anisotropy during tensile testing of a gradient-structured metal. Strain gradients and anisotropy in the lateral directions were observed to increase with increasing applied tensile strain. In addition, the equivalent Poisson's ratio showed gradient, which evolved with applied strain. The gradient structure produced higher deformation anisotropy than coarse-grained homogeneous structure, and the anisotropy increased with increasing tensile strain. The strain gradient and anisotropy resulted in strong back-stress hardening, large strain gradients, and a high density of geometrically necessary dislocations, which helped with increasing the ductility.
分类号	二类
URL标识	查看原文
WOS关键词	SEVERE PLASTIC-DEFORMATION ; MECHANICAL-PROPERTIES ; NANOCRYSTALLINE MATERIALS ; TENSILE DUCTILITY ; MAXIMUM STRENGTH ; STAINLESS-STEEL ; BAUSCHINGER ; ALLOYS ; COPPER
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000406486700002
资助机构	NSFC(11472286 ; 973 Program of China(2012CB932203 ; Chinese Academy of Sciences(XDB22040503) ; US Army Research Office(W911 NF-12-1-0009) ; US National Science Foundation(DMT-1104667) ; Nanjing University of Science and Technology ; 11572328 ; 2012CB937500) ; 11672313)
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/70020]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Yuan, FP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Bian XD,Yuan FP,Wu XL,et al. The Evolution of Strain Gradient and Anisotropy in Gradient-Structured Metal[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2017,48A(9):3951-3960.
APA	卞祥德,袁福平,武晓雷,Zhu, Yuntian,&Yuan, FP .(2017).The Evolution of Strain Gradient and Anisotropy in Gradient-Structured Metal.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,48A(9),3951-3960.
MLA	卞祥德,et al."The Evolution of Strain Gradient and Anisotropy in Gradient-Structured Metal".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 48A.9(2017):3951-3960.