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Rejuvenation of plasticity via deformation graining in magnesium
Magnesium, the lightest structural metal, usually exhibits limited ambient plasticity when compressed along its crystallographic c-axis (the “hard” orientation of magnesium). Here we report large plasticity in c-axis compression of submicron magnesium single crystal achieved by a dual-stage deformat...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8881527/ https://www.ncbi.nlm.nih.gov/pubmed/35217663 http://dx.doi.org/10.1038/s41467-022-28688-9 |
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author | Liu, Bo-Yu Zhang, Zhen Liu, Fei Yang, Nan Li, Bin Chen, Peng Wang, Yu Peng, Jin-Hua Li, Ju Ma, En Shan, Zhi-Wei |
author_facet | Liu, Bo-Yu Zhang, Zhen Liu, Fei Yang, Nan Li, Bin Chen, Peng Wang, Yu Peng, Jin-Hua Li, Ju Ma, En Shan, Zhi-Wei |
author_sort | Liu, Bo-Yu |
collection | PubMed |
description | Magnesium, the lightest structural metal, usually exhibits limited ambient plasticity when compressed along its crystallographic c-axis (the “hard” orientation of magnesium). Here we report large plasticity in c-axis compression of submicron magnesium single crystal achieved by a dual-stage deformation. We show that when the plastic flow gradually strain-hardens the magnesium crystal to gigapascal level, at which point dislocation mediated plasticity is nearly exhausted, the sample instantly pancakes without fracture, accompanying a conversion of the initial single crystal into multiple grains that roughly share a common rotation axis. Atomic-scale characterization, crystallographic analyses and molecular dynamics simulations indicate that the new grains can form via transformation of pyramidal to basal planes. We categorize this grain formation as “deformation graining”. The formation of new grains rejuvenates massive dislocation slip and deformation twinning to enable large plastic strains. |
format | Online Article Text |
id | pubmed-8881527 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-88815272022-03-17 Rejuvenation of plasticity via deformation graining in magnesium Liu, Bo-Yu Zhang, Zhen Liu, Fei Yang, Nan Li, Bin Chen, Peng Wang, Yu Peng, Jin-Hua Li, Ju Ma, En Shan, Zhi-Wei Nat Commun Article Magnesium, the lightest structural metal, usually exhibits limited ambient plasticity when compressed along its crystallographic c-axis (the “hard” orientation of magnesium). Here we report large plasticity in c-axis compression of submicron magnesium single crystal achieved by a dual-stage deformation. We show that when the plastic flow gradually strain-hardens the magnesium crystal to gigapascal level, at which point dislocation mediated plasticity is nearly exhausted, the sample instantly pancakes without fracture, accompanying a conversion of the initial single crystal into multiple grains that roughly share a common rotation axis. Atomic-scale characterization, crystallographic analyses and molecular dynamics simulations indicate that the new grains can form via transformation of pyramidal to basal planes. We categorize this grain formation as “deformation graining”. The formation of new grains rejuvenates massive dislocation slip and deformation twinning to enable large plastic strains. Nature Publishing Group UK 2022-02-25 /pmc/articles/PMC8881527/ /pubmed/35217663 http://dx.doi.org/10.1038/s41467-022-28688-9 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Liu, Bo-Yu Zhang, Zhen Liu, Fei Yang, Nan Li, Bin Chen, Peng Wang, Yu Peng, Jin-Hua Li, Ju Ma, En Shan, Zhi-Wei Rejuvenation of plasticity via deformation graining in magnesium |
title | Rejuvenation of plasticity via deformation graining in magnesium |
title_full | Rejuvenation of plasticity via deformation graining in magnesium |
title_fullStr | Rejuvenation of plasticity via deformation graining in magnesium |
title_full_unstemmed | Rejuvenation of plasticity via deformation graining in magnesium |
title_short | Rejuvenation of plasticity via deformation graining in magnesium |
title_sort | rejuvenation of plasticity via deformation graining in magnesium |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8881527/ https://www.ncbi.nlm.nih.gov/pubmed/35217663 http://dx.doi.org/10.1038/s41467-022-28688-9 |
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