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Title:
The Evolution of Strain Gradient and Anisotropy in Gradient-Structured Metal
Author: Bian XD(卞祥德); Yuan FP(袁福平); Wu XL(武晓雷); Zhu, Yuntian
Source: METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Issued Date: 2017-09-01
Volume: 48A, Issue:9, Pages:3951-3960
Abstract: 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.
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Yuan, FP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Correspondent Email: fpyuan@lnm.imech.ac.cn
DOI: 10.1007/s11661-017-4199-2
Related URLs: 查看原文
DOC Type: Article
WOS Subject: Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS Subject Extended: Materials Science ; Metallurgy & Metallurgical Engineering
WOS Keyword Plus: SEVERE PLASTIC-DEFORMATION ; MECHANICAL-PROPERTIES ; NANOCRYSTALLINE MATERIALS ; TENSILE DUCTILITY ; MAXIMUM STRENGTH ; STAINLESS-STEEL ; BAUSCHINGER ; ALLOYS ; COPPER
WOS ID: WOS:000406486700002
ISSN: 1073-5623
Funder: 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)
Department: LNM材料介观力学性能的表征
Classification: 二类
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/70020
Appears in Collections:非线性力学国家重点实验室_期刊论文

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Recommended Citation:
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,2017-09-01,48A(9):3951-3960.
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