Interstitial loop strengthening upon deformation in aluminum via molecular dynamics simulations

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	Interstitial loop strengthening upon deformation in aluminum via molecular dynamics simulations
	H. Wang; D. S. Xu; P. Veyssiere; R. Yang
	2013
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	61 期号:9 页码:3499-3508
摘要	The formation of prismatic interstitial loops during plastic deformation, as well as their interaction with dislocations, is systematically investigated in aluminum, using molecular dynamics simulations. First, direct dislocation interaction is responsible for producing various types of defects, typically vacancies and their clusters and interstitial loops. Secondly, small interstitial loops act as obstacles to dislocation gliding. When close to each other, a loop either decorates a dislocation with jogs or drags it elastically. The mobility of a dislocation decorated by a loop is significantly reduced. Depending on the relative position of the dislocation and the loop, the Peierls stress can increase several hundred times. The present work shows a complete picture of dislocation-loop interaction with atomic-scale details, which provides reliable information for parameterizing dislocation-debris interactions in constitutive models. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[wang, h. ; xu, d. s. ; yang, r.] chinese acad sci, inst met res, shenyang 110016, peoples r china. [veyssiere, p.] cnrs onera, lem, f-92322 chatillon, france. ; wang, h (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china. ; haowang@imr.ac.cn
关键词	Plasticity Hardening Molecular Dynamics Dislocation Prismatic Loop Stacking-fault Tetrahedra Dislocation Dynamics Temperature-dependence Edge Dislocation Quenched Gold Atomic-scale Fcc Metals Part i Dipole Annihilation Screw Dislocations
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71525
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Wang,D. S. Xu,P. Veyssiere,et al. Interstitial loop strengthening upon deformation in aluminum via molecular dynamics simulations[J]. Acta Materialia,2013,61(9):3499-3508.
APA	H. Wang,D. S. Xu,P. Veyssiere,&R. Yang.(2013).Interstitial loop strengthening upon deformation in aluminum via molecular dynamics simulations.Acta Materialia,61(9),3499-3508.
MLA	H. Wang,et al."Interstitial loop strengthening upon deformation in aluminum via molecular dynamics simulations".Acta Materialia 61.9(2013):3499-3508.