Understanding activation and growth of twin variants in polycrystalline magnesium under tension and compression: An atomistic study
Deformation twinning is known to be important in the acquisition of plasticity for hexagonal close-packed crystal structures, of great implication to the design and development of novel high-strength Mg alloys with enhanced formability. Accurate understanding of deformation twinning necessitates cri...
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KeAi Communications Co., Ltd.
2024-12-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956724003931 |
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| author | Huicong Chen Cheng Chen Jun Song Stephen Yue |
| author_facet | Huicong Chen Cheng Chen Jun Song Stephen Yue |
| author_sort | Huicong Chen |
| collection | DOAJ |
| description | Deformation twinning is known to be important in the acquisition of plasticity for hexagonal close-packed crystal structures, of great implication to the design and development of novel high-strength Mg alloys with enhanced formability. Accurate understanding of deformation twinning necessitates critical mechanistic knowledge of the activation and selection of twins at nanoscale. In this work, considering polycrystalline Mg, we performed comprehensive molecular dynamics simulations to investigate deformation twinning under uniaxial tension and compression loading. An algorithm has been developed and implemented to identify the active twin variants of three operating twin modes during deformation. Sharp contrast between tension and compression loading in terms of twin patterns and twin growth was observed, attributed to difference in twin variant activation and twin-twin interaction under the two loading conditions. Furthermore, the critical role of Schmid factor in twin variant activation and selection has been elucidated, in good agreement with experimental observations. This study contributes critical insights towards advancing our understanding of the complex behaviors of deformation twinning in polycrystalline Mg. |
| format | Article |
| id | doaj-art-c62dd6e5f74c49ec899223c1329d4512 |
| institution | Kabale University |
| issn | 2213-9567 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-c62dd6e5f74c49ec899223c1329d45122025-01-10T04:37:59ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672024-12-01121249234936Understanding activation and growth of twin variants in polycrystalline magnesium under tension and compression: An atomistic studyHuicong Chen0Cheng Chen1Jun Song2Stephen Yue3Department of Mining and Materials Engineering, McGill University, 3610 Rue University, Montréal, H3A 0C5, CanadaSchool of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, ChinaDepartment of Mining and Materials Engineering, McGill University, 3610 Rue University, Montréal, H3A 0C5, Canada; Corresponding author.Department of Mining and Materials Engineering, McGill University, 3610 Rue University, Montréal, H3A 0C5, CanadaDeformation twinning is known to be important in the acquisition of plasticity for hexagonal close-packed crystal structures, of great implication to the design and development of novel high-strength Mg alloys with enhanced formability. Accurate understanding of deformation twinning necessitates critical mechanistic knowledge of the activation and selection of twins at nanoscale. In this work, considering polycrystalline Mg, we performed comprehensive molecular dynamics simulations to investigate deformation twinning under uniaxial tension and compression loading. An algorithm has been developed and implemented to identify the active twin variants of three operating twin modes during deformation. Sharp contrast between tension and compression loading in terms of twin patterns and twin growth was observed, attributed to difference in twin variant activation and twin-twin interaction under the two loading conditions. Furthermore, the critical role of Schmid factor in twin variant activation and selection has been elucidated, in good agreement with experimental observations. This study contributes critical insights towards advancing our understanding of the complex behaviors of deformation twinning in polycrystalline Mg.http://www.sciencedirect.com/science/article/pii/S2213956724003931MagnesiumDeformation twinningTwin variantSchmid factorMolecular dynamics |
| spellingShingle | Huicong Chen Cheng Chen Jun Song Stephen Yue Understanding activation and growth of twin variants in polycrystalline magnesium under tension and compression: An atomistic study Journal of Magnesium and Alloys Magnesium Deformation twinning Twin variant Schmid factor Molecular dynamics |
| title | Understanding activation and growth of twin variants in polycrystalline magnesium under tension and compression: An atomistic study |
| title_full | Understanding activation and growth of twin variants in polycrystalline magnesium under tension and compression: An atomistic study |
| title_fullStr | Understanding activation and growth of twin variants in polycrystalline magnesium under tension and compression: An atomistic study |
| title_full_unstemmed | Understanding activation and growth of twin variants in polycrystalline magnesium under tension and compression: An atomistic study |
| title_short | Understanding activation and growth of twin variants in polycrystalline magnesium under tension and compression: An atomistic study |
| title_sort | understanding activation and growth of twin variants in polycrystalline magnesium under tension and compression an atomistic study |
| topic | Magnesium Deformation twinning Twin variant Schmid factor Molecular dynamics |
| url | http://www.sciencedirect.com/science/article/pii/S2213956724003931 |
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