Sliding of coherent twin boundaries
文献类型：期刊论文
| 作者 | Wang, Zhang-Jie; Li, Qing-Jie; Li, Yao; Huang, Long-Chao; Lu, Lei; Dao, Ming; Li, Ju; Ma, Evan; Suresh, Subra; Shan, Zhi-Wei |
| 刊名 | NATURE PUBLISHING GROUP
 |
| 出版日期 | 2017-10-24 |
| 卷号 | 8页码:- |
| ISSN号 | 2041-1723 |
| 英文摘要 | 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. |
| 学科主题 | Multidisciplinary Sciences |
| 语种 | 英语 |
| 资助机构 | 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) |
| 公开日期 | 2018-01-10 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79034]  |
| 专题 | 金属研究所_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. |
| 推荐引用方式 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):-. |
入库方式： OAI收割
来源：金属研究所
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