Sliding of coherent twin boundaries
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 lar...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
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Nature Publishing Group
2017
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| Online Access: | http://hdl.handle.net/1721.1/112713 https://orcid.org/0000-0002-7841-8058 |
| _version_ | 1826215479401775104 |
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| author | Wang, Zhang-Jie Li, Qing-Jie Li, Yao Huang, Long-Chao Lu, Lei Dao, Ming Li, Ju Ma, Evan Suresh, Subra Shan, Zhi-Wei |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Wang, Zhang-Jie Li, Qing-Jie Li, Yao Huang, Long-Chao Lu, Lei Dao, Ming Li, Ju Ma, Evan Suresh, Subra Shan, Zhi-Wei |
| author_sort | Wang, Zhang-Jie |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T16:31:03Z |
| format | Article |
| id | mit-1721.1/112713 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T16:31:03Z |
| publishDate | 2017 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/1127132022-09-29T20:04:38Z 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 Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Li, Ju Dao, Ming 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. 2017-12-12T16:19:57Z 2017-12-12T16:19:57Z 2017-10 2016-11 2017-12-11T18:36:58Z Article http://purl.org/eprint/type/JournalArticle 2041-1723 http://hdl.handle.net/1721.1/112713 Wang, Zhang-Jie, et al. “Sliding of Coherent Twin Boundaries.” Nature Communications 8, 1 (October 2017): 1108 © 2017 The Author(s) https://orcid.org/0000-0002-7841-8058 http://dx.doi.org/10.1038/s41467-017-01234-8 Nature Communications Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ application/pdf Nature Publishing Group Nature |
| spellingShingle | Wang, Zhang-Jie Li, Qing-Jie Li, Yao Huang, Long-Chao Lu, Lei Dao, Ming Li, Ju Ma, Evan Suresh, Subra Shan, Zhi-Wei Sliding of coherent twin boundaries |
| title | Sliding of coherent twin boundaries |
| title_full | Sliding of coherent twin boundaries |
| title_fullStr | Sliding of coherent twin boundaries |
| title_full_unstemmed | Sliding of coherent twin boundaries |
| title_short | Sliding of coherent twin boundaries |
| title_sort | sliding of coherent twin boundaries |
| url | http://hdl.handle.net/1721.1/112713 https://orcid.org/0000-0002-7841-8058 |
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