Dislocation-mediated reversible grain rotation
Atomic-scale grain rotation processes in NC AuCu alloy are captured in situ. We discovered a full dislocation-mediated reversible grain rotation that has rarely been reported before. The results show that, with loading, full dislocations nucleate, glide across the grain to the grain boundary (GB) an...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2025-08-01
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| Series: | Materials Research Letters |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/21663831.2025.2527827 |
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| author | Chengpeng Yang Zhanxin Wang Zihao Zhang Yufeng Zhao Jiao Teng Qixun Guo Yan Ma Lixing Kang Lihua Wang Xiaodong Han |
| author_facet | Chengpeng Yang Zhanxin Wang Zihao Zhang Yufeng Zhao Jiao Teng Qixun Guo Yan Ma Lixing Kang Lihua Wang Xiaodong Han |
| author_sort | Chengpeng Yang |
| collection | DOAJ |
| description | Atomic-scale grain rotation processes in NC AuCu alloy are captured in situ. We discovered a full dislocation-mediated reversible grain rotation that has rarely been reported before. The results show that, with loading, full dislocations nucleate, glide across the grain to the grain boundary (GB) and then accumulate at the GB, resulting in grain rotation. With unloading, full dislocations escape from GB and annihilate at the opposite GB or free surface, which leads to the reversible grain rotation. The current study provides direct evidence that both intragranular dislocation and GB plasticity can occur simultaneously during deformation, and comprehensive our understanding of the NC alloy deformation mechanism. |
| format | Article |
| id | doaj-art-d63400d697064d14b46b7b6983478fa2 |
| institution | Matheson Library |
| issn | 2166-3831 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Materials Research Letters |
| spelling | doaj-art-d63400d697064d14b46b7b6983478fa22025-07-31T13:02:17ZengTaylor & Francis GroupMaterials Research Letters2166-38312025-08-0113889490110.1080/21663831.2025.2527827Dislocation-mediated reversible grain rotationChengpeng Yang0Zhanxin Wang1Zihao Zhang2Yufeng Zhao3Jiao Teng4Qixun Guo5Yan Ma6Lixing Kang7Lihua Wang8Xiaodong Han9Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Division of Advanced Materials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, People’s Republic of ChinaInstitute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing, People’s Republic of ChinaInstitute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing, People’s Republic of ChinaInstitute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing, People’s Republic of ChinaDepartment of Material Physics and Chemistry, University of Science and Technology Beijing, Beijing, People’s Republic of ChinaJi Hua Laboratory, Foshan, People’s Republic of ChinaInstitute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing, People’s Republic of ChinaKey Laboratory of Multifunctional Nanomaterials and Smart Systems, Division of Advanced Materials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, People’s Republic of ChinaInstitute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing, People’s Republic of ChinaInstitute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing, People’s Republic of ChinaAtomic-scale grain rotation processes in NC AuCu alloy are captured in situ. We discovered a full dislocation-mediated reversible grain rotation that has rarely been reported before. The results show that, with loading, full dislocations nucleate, glide across the grain to the grain boundary (GB) and then accumulate at the GB, resulting in grain rotation. With unloading, full dislocations escape from GB and annihilate at the opposite GB or free surface, which leads to the reversible grain rotation. The current study provides direct evidence that both intragranular dislocation and GB plasticity can occur simultaneously during deformation, and comprehensive our understanding of the NC alloy deformation mechanism.https://www.tandfonline.com/doi/10.1080/21663831.2025.2527827In situTEMnanocrystallinegrain rotationdeformation |
| spellingShingle | Chengpeng Yang Zhanxin Wang Zihao Zhang Yufeng Zhao Jiao Teng Qixun Guo Yan Ma Lixing Kang Lihua Wang Xiaodong Han Dislocation-mediated reversible grain rotation Materials Research Letters In situ TEM nanocrystalline grain rotation deformation |
| title | Dislocation-mediated reversible grain rotation |
| title_full | Dislocation-mediated reversible grain rotation |
| title_fullStr | Dislocation-mediated reversible grain rotation |
| title_full_unstemmed | Dislocation-mediated reversible grain rotation |
| title_short | Dislocation-mediated reversible grain rotation |
| title_sort | dislocation mediated reversible grain rotation |
| topic | In situ TEM nanocrystalline grain rotation deformation |
| url | https://www.tandfonline.com/doi/10.1080/21663831.2025.2527827 |
| work_keys_str_mv | AT chengpengyang dislocationmediatedreversiblegrainrotation AT zhanxinwang dislocationmediatedreversiblegrainrotation AT zihaozhang dislocationmediatedreversiblegrainrotation AT yufengzhao dislocationmediatedreversiblegrainrotation AT jiaoteng dislocationmediatedreversiblegrainrotation AT qixunguo dislocationmediatedreversiblegrainrotation AT yanma dislocationmediatedreversiblegrainrotation AT lixingkang dislocationmediatedreversiblegrainrotation AT lihuawang dislocationmediatedreversiblegrainrotation AT xiaodonghan dislocationmediatedreversiblegrainrotation |