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Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins
Conventional ultrafine-grains can generate high strength in Mg alloys, but significant tradeoff of corrosion resistance due to inclusion of a large number of non-equilibrium grain boundaries. Herein, an ultrafine-grain structure consisting of dense ultrafine twins is prepared, yielding a high streng...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8322409/ https://www.ncbi.nlm.nih.gov/pubmed/34326339 http://dx.doi.org/10.1038/s41467-021-24939-3 |
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author | Yan, Changjian Xin, Yunchang Chen, Xiao-Bo Xu, Daokui Chu, Paul K. Liu, Chaoqiang Guan, Bo Huang, Xiaoxu Liu, Qing |
author_facet | Yan, Changjian Xin, Yunchang Chen, Xiao-Bo Xu, Daokui Chu, Paul K. Liu, Chaoqiang Guan, Bo Huang, Xiaoxu Liu, Qing |
author_sort | Yan, Changjian |
collection | PubMed |
description | Conventional ultrafine-grains can generate high strength in Mg alloys, but significant tradeoff of corrosion resistance due to inclusion of a large number of non-equilibrium grain boundaries. Herein, an ultrafine-grain structure consisting of dense ultrafine twins is prepared, yielding a high strength up to 469 MPa and decreasing the corrosion rate by one order of magnitude. Generally, the formation of dense ultrafine twins in Mg alloys is rather difficult, but a carefully designed multi-directional compression treatment effectively stimulates twinning nucleation within twins and refines grain size down to 300 nm after 12-passes compressions. Grain-refinement by low-energy twins not only circumvents the detrimental effects of non-equilibrium grain boundaries on corrosion resistance, but also alters both the morphology and distribution of precipitates. Consequently, micro-galvanic corrosion tendency decreases, and severe localized corrosion is suppressed completely. This technique has a high commercial viability as it can be readily implemented in industrial production. |
format | Online Article Text |
id | pubmed-8322409 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-83224092021-08-03 Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins Yan, Changjian Xin, Yunchang Chen, Xiao-Bo Xu, Daokui Chu, Paul K. Liu, Chaoqiang Guan, Bo Huang, Xiaoxu Liu, Qing Nat Commun Article Conventional ultrafine-grains can generate high strength in Mg alloys, but significant tradeoff of corrosion resistance due to inclusion of a large number of non-equilibrium grain boundaries. Herein, an ultrafine-grain structure consisting of dense ultrafine twins is prepared, yielding a high strength up to 469 MPa and decreasing the corrosion rate by one order of magnitude. Generally, the formation of dense ultrafine twins in Mg alloys is rather difficult, but a carefully designed multi-directional compression treatment effectively stimulates twinning nucleation within twins and refines grain size down to 300 nm after 12-passes compressions. Grain-refinement by low-energy twins not only circumvents the detrimental effects of non-equilibrium grain boundaries on corrosion resistance, but also alters both the morphology and distribution of precipitates. Consequently, micro-galvanic corrosion tendency decreases, and severe localized corrosion is suppressed completely. This technique has a high commercial viability as it can be readily implemented in industrial production. Nature Publishing Group UK 2021-07-29 /pmc/articles/PMC8322409/ /pubmed/34326339 http://dx.doi.org/10.1038/s41467-021-24939-3 Text en © The Author(s) 2021 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 Yan, Changjian Xin, Yunchang Chen, Xiao-Bo Xu, Daokui Chu, Paul K. Liu, Chaoqiang Guan, Bo Huang, Xiaoxu Liu, Qing Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins |
title | Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins |
title_full | Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins |
title_fullStr | Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins |
title_full_unstemmed | Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins |
title_short | Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins |
title_sort | evading strength-corrosion tradeoff in mg alloys via dense ultrafine twins |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8322409/ https://www.ncbi.nlm.nih.gov/pubmed/34326339 http://dx.doi.org/10.1038/s41467-021-24939-3 |
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