Slip-dominated structural transitions
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866912497567531008 |
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| author | Ghosh, Kanka Salman, Oguz Umut Queyreau, Sylvain Truskinovsky, Lev |
| author_facet | Ghosh, Kanka Salman, Oguz Umut Queyreau, Sylvain Truskinovsky, Lev |
| contents | We use molecular dynamics to show that plastic slip is a crucial component of the transformation mechanism of a square-to-triangular structural transition. The latter is a stylized analog of many other reconstructive phase transitions. To justify our conclusions we use a novel atomistically-informed mesoscopic representation of the field of lattice distortions in molecular dynamics simulations. Our approach reveals a hidden alternating slip distribution behind the seemingly homogeneous product phase which points to the fact that lattice invariant shears play a central role in this class of phase transformations. While the underlying pattern of anti-parallel displacements may be also interpreted as microscopic shuffling, its precise crystallographic nature strongly suggests the plasticity-centered interpretation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_04066 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Slip-dominated structural transitions Ghosh, Kanka Salman, Oguz Umut Queyreau, Sylvain Truskinovsky, Lev Materials Science Mesoscale and Nanoscale Physics Pattern Formation and Solitons Computational Physics We use molecular dynamics to show that plastic slip is a crucial component of the transformation mechanism of a square-to-triangular structural transition. The latter is a stylized analog of many other reconstructive phase transitions. To justify our conclusions we use a novel atomistically-informed mesoscopic representation of the field of lattice distortions in molecular dynamics simulations. Our approach reveals a hidden alternating slip distribution behind the seemingly homogeneous product phase which points to the fact that lattice invariant shears play a central role in this class of phase transformations. While the underlying pattern of anti-parallel displacements may be also interpreted as microscopic shuffling, its precise crystallographic nature strongly suggests the plasticity-centered interpretation. |
| title | Slip-dominated structural transitions |
| topic | Materials Science Mesoscale and Nanoscale Physics Pattern Formation and Solitons Computational Physics |
| url | https://arxiv.org/abs/2409.04066 |