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
	2012
发表期刊	Scripta Materialia
ISSN	1359-6462
卷号	67 期号:11 页码:911-914
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.
部门归属	[yang, z. q.; he, l. l.; ye, h. q.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [yang, z. q.; chisholm, m. f.; pennycook, s. j.] oak ridge natl lab, div mat sci & technol, oak ridge, tn 37831 usa.;yang, zq (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;yangzq34@gmail.com
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
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60408
专题	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.