Atomic-scale processes revealing dynamic twin boundary strengthening mechanisms in face-centered cubic materials

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	Atomic-scale processes revealing dynamic twin boundary strengthening mechanisms in face-centered cubic materials
	Z. Q. Yang ; M. F. Chisholm ; L. L. He ; S. J. Pennycook ; H. Q. Ye
刊名	Scripta Materialia
	2012
卷号	67 期号:11 页码:911-914
关键词	Twin boundary Dislocation Strengthening Plasticity Face-centered cubic metals nanocrystalline al lattice dislocations deformation twins maximum strength grain-boundaries metals crystals nucleation simulation aluminum
ISSN号	1359-6462
中文摘要	We report experimental investigations on interactions/reactions between dislocations and twin boundaries in Al. The absorption of screw dislocations via cross-slip and the production of stair-rods via reactions with non-screw dislocations were verified by atomic resolution imaging. Importantly, the resulting partial dislocations moving along twin boundaries can produce secondary sessile defects. These immobile defects act as obstacles to other dislocations and also serve to pin the twin boundaries. These findings show the atomic-level dynamics of the dislocation twin boundary processes and the unique strengthening mechanism of twin boundaries in face-centered cubic metals. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
原文出处	://WOS:000310390000011
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/60408]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Q. Yang,M. F. Chisholm,L. L. He,et al. Atomic-scale processes revealing dynamic twin boundary strengthening mechanisms in face-centered cubic materials[J]. Scripta Materialia,2012,67(11):911-914.
APA	Z. Q. Yang,M. F. Chisholm,L. L. He,S. J. Pennycook,&H. Q. Ye.(2012).Atomic-scale processes revealing dynamic twin boundary strengthening mechanisms in face-centered cubic materials.Scripta Materialia,67(11),911-914.
MLA	Z. Q. Yang,et al."Atomic-scale processes revealing dynamic twin boundary strengthening mechanisms in face-centered cubic materials".Scripta Materialia 67.11(2012):911-914.