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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
发表期刊NATURE PUBLISHING GROUP
ISSN2041-1723
卷号8页码:-
摘要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.; 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.
部门归属[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
学科领域Multidisciplinary Sciences
资助者Natural 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)
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79034
专题中国科学院金属研究所
通讯作者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.
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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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