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dislocations and their interactions with other crystal defects in a Mg alloy
Hu, W. W.; Yang, Z. Q.; Ye, H. Q.; Yang, ZQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
2017-02-01
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume124Pages:372-382
Abstract dislocations and their interactions with other crystal defects in a Mg alloy have been investigated using atomic-resolution aberration-corrected scanning transmission electron microscopy. Two types of dislocations, with either a 60 degrees or a screw component, were observed in Mg matrix, and both of them could form low-angle tilt grain boundaries during plastic deformation. dislocations could lead to migration of grain boundaries formed previously by dislocations in deformed Mg matrix. Moving dislocations cut and reacted with basal stacking faults, producing new defect structures during deformation. The mechanisms for interaction/reaction between dislocations and other defects are modeled based on atomic-resolution observations. These experimental results provide clear evidence for the occurrence of long range motion of dislocations with relatively compact cores during plastic deformation, instead of immediate dissociation on basal planes. (c) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; dislocations and their interactions with other crystal defects in a Mg alloy have been investigated using atomic-resolution aberration-corrected scanning transmission electron microscopy. Two types of dislocations, with either a 60 degrees or a screw component, were observed in Mg matrix, and both of them could form low-angle tilt grain boundaries during plastic deformation. dislocations could lead to migration of grain boundaries formed previously by dislocations in deformed Mg matrix. Moving dislocations cut and reacted with basal stacking faults, producing new defect structures during deformation. The mechanisms for interaction/reaction between dislocations and other defects are modeled based on atomic-resolution observations. These experimental results provide clear evidence for the occurrence of long range motion of dislocations with relatively compact cores during plastic deformation, instead of immediate dissociation on basal planes. (c) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
description.department[hu, w. w. ; yang, z. q. ; ye, h. q.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [hu, w. w.] univ chinese acad sci, beijing 100039, peoples r china
KeywordMg Alloy Dislocation Plastic Deformation Ductility Grain Boundary
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51171189, 51371178, 51390473]; Liaoning Province [2015020237]; SYNL [2015RP17]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78322
Collection中国科学院金属研究所
Corresponding AuthorYang, ZQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Hu, W. W.,Yang, Z. Q.,Ye, H. Q.,et al. dislocations and their interactions with other crystal defects in a Mg alloy[J]. ACTA MATERIALIA,2017,124:372-382.
APA Hu, W. W.,Yang, Z. Q.,Ye, H. Q.,&Yang, ZQ .(2017). dislocations and their interactions with other crystal defects in a Mg alloy.ACTA MATERIALIA,124,372-382.
MLA Hu, W. W.,et al." dislocations and their interactions with other crystal defects in a Mg alloy".ACTA MATERIALIA 124(2017):372-382.
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