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Sliding of coherent twin boundaries
Wang, Zhang-Jie; Li, Qing-Jie; Li, Yao; Huang, Long-Chao; Lu, Lei; Dao, Ming; Li, Ju; Ma, Evan; Suresh, Subra; Shan, Zhi-Wei; Ma, E; Shan, ZW (reprint author), Xi An Jiao Tong Univ, Ctr Adv Mat Performance Nanoscale, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China.; Shan, ZW (reprint author), Xi An Jiao Tong Univ, Hysitron Appl Res Ctr China, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China.; Ma, E (reprint author), Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA.
2017-10-24
Source PublicationNATURE PUBLISHING GROUP
ISSN2041-1723
Volume8Pages:-
AbstractCoherent twin boundaries (CTBs) are internal interfaces that can play a key role in markedly enhancing the strength of metallic materials while preserving their ductility. They are known to accommodate plastic deformation primarily through their migration, while experimental evidence documenting large-scale sliding of CTBs to facilitate deformation has thus far not been reported. We show here that CTB sliding is possible whenever the loading orientation enables the Schmid factors of leading and trailing partial dislocations to be comparable to each other. This theoretical prediction is confirmed by real-time transmission electron microscope experimental observations during uniaxial deformation of copper pillars with different orientations and is further validated at the atomic scale by recourse to molecular dynamics simulations. Our findings provide mechanistic insights into the evolution of plasticity in heavily twinned face-centered cubic metals, with the potential for optimizing mechanical properties with nanoscale CTBs in material design.; Coherent twin boundaries (CTBs) are internal interfaces that can play a key role in markedly enhancing the strength of metallic materials while preserving their ductility. They are known to accommodate plastic deformation primarily through their migration, while experimental evidence documenting large-scale sliding of CTBs to facilitate deformation has thus far not been reported. We show here that CTB sliding is possible whenever the loading orientation enables the Schmid factors of leading and trailing partial dislocations to be comparable to each other. This theoretical prediction is confirmed by real-time transmission electron microscope experimental observations during uniaxial deformation of copper pillars with different orientations and is further validated at the atomic scale by recourse to molecular dynamics simulations. Our findings provide mechanistic insights into the evolution of plasticity in heavily twinned face-centered cubic metals, with the potential for optimizing mechanical properties with nanoscale CTBs in material design.
description.department[wang, zhang-jie ; li, yao ; huang, long-chao ; dao, ming ; li, ju ; ma, evan ; shan, zhi-wei] xi an jiao tong univ, ctr adv mat performance nanoscale, state key lab mech behav mat, xian 710049, shaanxi, peoples r china ; [wang, zhang-jie ; li, yao ; huang, long-chao ; dao, ming ; li, ju ; ma, evan ; shan, zhi-wei] xi an jiao tong univ, hysitron appl res ctr china, state key lab mech behav mat, xian 710049, shaanxi, peoples r china ; [li, qing-jie ; ma, evan] johns hopkins univ, dept mat sci & engn, baltimore, md 21218 usa ; [lu, lei] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, liaoning, peoples r china ; [dao, ming ; li, ju] mit, dept mat sci & engn, cambridge, ma 02139 usa ; [li, ju] mit, dept nucl sci & engn, cambridge, ma 02139 usa ; [suresh, subra] nanyang technol univ, 50 nanyang ave,main campus, singapore 639798, singapore
Subject AreaMultidisciplinary Sciences
Funding OrganizationNatural Science Foundation of China [51231005, 51401159, 51621063, 51420105001]; 973 Programs of China [2012CB619402]; 111 project [B06025]; ExxonMobil Research & Engineering through MITEI; NSF [DMR-1410636]; U.S. DoE-BES-DMSE [DE-FG02-09ER46056]; Singapore-Massachusetts Institute of Technology Alliance for Research and Technology (SMART)
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79034
Collection中国科学院金属研究所
Corresponding AuthorMa, E; Shan, ZW (reprint author), Xi An Jiao Tong Univ, Ctr Adv Mat Performance Nanoscale, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China.; Shan, ZW (reprint author), Xi An Jiao Tong Univ, Hysitron Appl Res Ctr China, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China.; Ma, E (reprint author), Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA.
Recommended Citation
GB/T 7714
Wang, Zhang-Jie,Li, Qing-Jie,Li, Yao,et al. Sliding of coherent twin boundaries[J]. NATURE PUBLISHING GROUP,2017,8:-.
APA Wang, Zhang-Jie.,Li, Qing-Jie.,Li, Yao.,Huang, Long-Chao.,Lu, Lei.,...&Ma, E .(2017).Sliding of coherent twin boundaries.NATURE PUBLISHING GROUP,8,-.
MLA Wang, Zhang-Jie,et al."Sliding of coherent twin boundaries".NATURE PUBLISHING GROUP 8(2017):-.
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