Transmutation of zonal twinning dislocations during non-cozone {101¯1} twin-twin interaction in magnesium
Theoretically, a twinning dislocation must stay on the twinning plane which is the first invariant plane of a twinning mode, because the glide of twinning dislocation linearly transforms the parent lattice to the twin lattice. However, recent experimental observations showed that a {101¯1}〈101¯2¯〉 t...
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KeAi Communications Co., Ltd.
2025-02-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956724000628 |
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| author | Peng Chen Bin Li |
| author_facet | Peng Chen Bin Li |
| author_sort | Peng Chen |
| collection | DOAJ |
| description | Theoretically, a twinning dislocation must stay on the twinning plane which is the first invariant plane of a twinning mode, because the glide of twinning dislocation linearly transforms the parent lattice to the twin lattice. However, recent experimental observations showed that a {101¯1}〈101¯2¯〉 twin variant could cross another variant during twin-twin interaction. It is well known that {101¯1} twinning is mediated by zonal twinning dislocations. Thus, how the zonal twinning dislocations transmute during twin-twin interaction is of great interest but not well understood. In this work, atomistic simulation is performed to investigate interaction between {101¯1} twin variants. Our results show that when an incoming twin variant impinges on the other which acts as a barrier, surprisingly, the barrier twin can grow at the expense of the incoming twin. Eventually one variant consumes the other. Structural analysis shows that the twinning dislocations of the barrier variant are able to penetrate the zone of twin-twin intersection, by plowing through the lattice of one variant and transform its lattice into the lattice of the other. Careful lattice correspondence analysis reveals that, the lattice transformation from one variant to the other is close to {101¯2}〈101¯1¯〉 twinning, but the orientation relationship deviates by a minor lattice rotation. This deviation presents a significant energy barrier to the lattice transformation, and thus it is expected such a twin-twin interaction will increase the stress for twin growth. |
| format | Article |
| id | doaj-art-61accf835c9741bf87d57af3d960ce11 |
| institution | DOAJ |
| issn | 2213-9567 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-61accf835c9741bf87d57af3d960ce112025-08-20T03:02:06ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672025-02-0113268169610.1016/j.jma.2024.01.032Transmutation of zonal twinning dislocations during non-cozone {101¯1} twin-twin interaction in magnesiumPeng Chen0Bin Li1Key Laboratory of Automobile Materials (Ministry of Education) and School of Materials Science and Engineering, Jilin University, Changchun 130022, China; Corresponding authors.Department of Industrial and Manufacturing Systems Engineering, Iowa State University, Ames, USA; Corresponding authors.Theoretically, a twinning dislocation must stay on the twinning plane which is the first invariant plane of a twinning mode, because the glide of twinning dislocation linearly transforms the parent lattice to the twin lattice. However, recent experimental observations showed that a {101¯1}〈101¯2¯〉 twin variant could cross another variant during twin-twin interaction. It is well known that {101¯1} twinning is mediated by zonal twinning dislocations. Thus, how the zonal twinning dislocations transmute during twin-twin interaction is of great interest but not well understood. In this work, atomistic simulation is performed to investigate interaction between {101¯1} twin variants. Our results show that when an incoming twin variant impinges on the other which acts as a barrier, surprisingly, the barrier twin can grow at the expense of the incoming twin. Eventually one variant consumes the other. Structural analysis shows that the twinning dislocations of the barrier variant are able to penetrate the zone of twin-twin intersection, by plowing through the lattice of one variant and transform its lattice into the lattice of the other. Careful lattice correspondence analysis reveals that, the lattice transformation from one variant to the other is close to {101¯2}〈101¯1¯〉 twinning, but the orientation relationship deviates by a minor lattice rotation. This deviation presents a significant energy barrier to the lattice transformation, and thus it is expected such a twin-twin interaction will increase the stress for twin growth.http://www.sciencedirect.com/science/article/pii/S2213956724000628MagnesiumContraction twinningAtomistic simulationLattice transformation |
| spellingShingle | Peng Chen Bin Li Transmutation of zonal twinning dislocations during non-cozone {101¯1} twin-twin interaction in magnesium Journal of Magnesium and Alloys Magnesium Contraction twinning Atomistic simulation Lattice transformation |
| title | Transmutation of zonal twinning dislocations during non-cozone {101¯1} twin-twin interaction in magnesium |
| title_full | Transmutation of zonal twinning dislocations during non-cozone {101¯1} twin-twin interaction in magnesium |
| title_fullStr | Transmutation of zonal twinning dislocations during non-cozone {101¯1} twin-twin interaction in magnesium |
| title_full_unstemmed | Transmutation of zonal twinning dislocations during non-cozone {101¯1} twin-twin interaction in magnesium |
| title_short | Transmutation of zonal twinning dislocations during non-cozone {101¯1} twin-twin interaction in magnesium |
| title_sort | transmutation of zonal twinning dislocations during non cozone 101¯1 twin twin interaction in magnesium |
| topic | Magnesium Contraction twinning Atomistic simulation Lattice transformation |
| url | http://www.sciencedirect.com/science/article/pii/S2213956724000628 |
| work_keys_str_mv | AT pengchen transmutationofzonaltwinningdislocationsduringnoncozone1011twintwininteractioninmagnesium AT binli transmutationofzonaltwinningdislocationsduringnoncozone1011twintwininteractioninmagnesium |