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Title: Scaling of maximum strength with grain size in nanotwinned fcc metals
Author: Wei YJ(魏宇杰)
Source: Physical Review B
Issued Date: 2011
Volume: 83, Issue:13, Pages:132104
Abstract: Engineers usually face the difficulty of making careful choices between one good and another in terms of strength, ductility, and electrical conductance in nanostructured metals. The emergence of polycrystalline Cu with ultrafine grains and the included nanotwins supplies an ideal solution because such materials owe high strength, high electrical conductance, and intermediate ductility. We answer in this Brief Report where the strength of such materials maximizes and how it depends on grain size. Based on the competitive plastic deformation mechanisms-the strengthening mechanism by inclined dislocations (with respect to twin planes) and detwinning-induced softening-we find that the critical twin thickness where the strength maximizes is proportional to d(1/2) and the maximum strength is proportional to d(-1/2).
Keyword: Nanocrystalline Materials ; Deformation Mechanisms ; Boundary Diffusion ; Rate Sensitivity ; Nanoscale ; Copper ; Accommodation ; Strain ; Twins
Language: 英语
Indexed Type: SCI
Corresponding Author: Wei, YJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Correspondent Email: yujie_wei@lnm.imech.ac.cn
DOI: 10.1103/PhysRevB.83.132104
Related URLs: 查看原文
DOC Type: Article
WOS Subject: Physics, Condensed Matter
WOS Subject Extended: Physics
WOS Keyword Plus: NANOCRYSTALLINE MATERIALS ; DEFORMATION MECHANISMS ; BOUNDARY DIFFUSION ; RATE SENSITIVITY ; NANOSCALE ; COPPER ; ACCOMMODATION ; STRAIN ; TWINS
WOS ID: WOS:000292142300001
ISSN: 1098-0121
Rank: Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Subject: Physics
Department: LNM微结构计算力学(筹)
Classification: 二类/Q1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/44934
Appears in Collections:非线性力学国家重点实验室_期刊论文

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魏宇杰.Scaling of maximum strength with grain size in nanotwinned fcc metals,PHYSICAL REVIEW B,2011,83(13):132104
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