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Strong crack blunting by shear-coupled migration of grain boundaries in nanocrystalline materials
Li JJ(李建军); Chen SH(陈少华); Wu XL(武晓雷); Soh AK; Li, JJ (reprint author), Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Dept Engn Mech, Xian, Shanxi, Peoples R China.
Source PublicationScripta Materialia
2014-08
Volume84-85Pages:51-54
ISSN1359-6462
AbstractA theoretical model is proposed to illustrate the effect of shear-coupled migration of grain boundaries on the emission of lattice dislocations from a semi-infinite crack tip in nanocrystalline materials. The results obtained show that the shear-coupled migration process is able to considerably enhance the capability of the crack to emit dislocations, thus leading to strong crack blunting. Moreover, the combination of grain boundary migration and dislocation emission can serve as an effective toughening mechanism in nanocrystalline materials. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
KeywordNanocrystalline Materials Shear-coupled Migration Of Grain Boundaries Cracks Dislocation Emission Toughening Mechanism
Subject AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000337768000013
Funding OrganizationJ.L. acknowledges the financial support by the Start-up funding (No. 13GH0316) 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.S. 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.
DepartmentLNM仿生材料与固体的微尺度力学
Classification一类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49022
Collection非线性力学国家重点实验室
Corresponding AuthorLi, JJ (reprint author), Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Dept Engn Mech, Xian, Shanxi, Peoples R China.
Recommended Citation
GB/T 7714
Li JJ,Chen SH,Wu XL,et al. Strong crack blunting by shear-coupled migration of grain boundaries in nanocrystalline materials[J]. Scripta Materialia,2014,84-85:51-54
APA Li JJ,Chen SH,Wu XL,Soh AK,&Li, JJ .(2014).Strong crack blunting by shear-coupled migration of grain boundaries in nanocrystalline materials.Scripta Materialia,84-85,51-54.
MLA Li JJ,et al."Strong crack blunting by shear-coupled migration of grain boundaries in nanocrystalline materials".Scripta Materialia 84-85(2014):51-54.
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