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Comparative study on twinning characteristics during two post-weld compression paths and their effects on joint enhancement
Friction stir welding (FSW) has promising application potential in Mg alloys. However, the texture distribution in stir zone (SZ) is usually complicated for Mg alloys, which deterioriates the joint performance. In this study, the texture distribution in SZ was tailored by applying two kinds of post-...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5180087/ https://www.ncbi.nlm.nih.gov/pubmed/28008982 http://dx.doi.org/10.1038/srep39779 |
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author | Liu, Zhe Xin, Renlong Li, Dongrong Sun, Liyun Liu, Qing |
author_facet | Liu, Zhe Xin, Renlong Li, Dongrong Sun, Liyun Liu, Qing |
author_sort | Liu, Zhe |
collection | PubMed |
description | Friction stir welding (FSW) has promising application potential in Mg alloys. However, the texture distribution in stir zone (SZ) is usually complicated for Mg alloys, which deterioriates the joint performance. In this study, the texture distribution in SZ was tailored by applying two kinds of post-weld compression deformation along normal direction (ND) or welding direction (WD) of the FSWed AZ31 Mg alloy plates. The twinning behavior and texture change in the various regions of SZ were then evaluated by electron back scatter diffraction (EBSD) characterization. The effect of texture change on the joint performance was discussed in terms of Schmid factors (SFs) for basal slip and extension twinning. The results showed that profuse extension twins were formed through the whole SZ for the sample subjected to compression along ND, whereas they were observed mainly in SZ-side for the sample compressed along WD. Most of the twins were present in the forms of twin bands or chains. The directions of the twin bands or chains were related to the habit plane traces of selected twin variants. The ND post-weld compression had better strengthening effects on the joints compared to the WD compression, and the underline mechanism was discussed. |
format | Online Article Text |
id | pubmed-5180087 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-51800872016-12-29 Comparative study on twinning characteristics during two post-weld compression paths and their effects on joint enhancement Liu, Zhe Xin, Renlong Li, Dongrong Sun, Liyun Liu, Qing Sci Rep Article Friction stir welding (FSW) has promising application potential in Mg alloys. However, the texture distribution in stir zone (SZ) is usually complicated for Mg alloys, which deterioriates the joint performance. In this study, the texture distribution in SZ was tailored by applying two kinds of post-weld compression deformation along normal direction (ND) or welding direction (WD) of the FSWed AZ31 Mg alloy plates. The twinning behavior and texture change in the various regions of SZ were then evaluated by electron back scatter diffraction (EBSD) characterization. The effect of texture change on the joint performance was discussed in terms of Schmid factors (SFs) for basal slip and extension twinning. The results showed that profuse extension twins were formed through the whole SZ for the sample subjected to compression along ND, whereas they were observed mainly in SZ-side for the sample compressed along WD. Most of the twins were present in the forms of twin bands or chains. The directions of the twin bands or chains were related to the habit plane traces of selected twin variants. The ND post-weld compression had better strengthening effects on the joints compared to the WD compression, and the underline mechanism was discussed. Nature Publishing Group 2016-12-23 /pmc/articles/PMC5180087/ /pubmed/28008982 http://dx.doi.org/10.1038/srep39779 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Liu, Zhe Xin, Renlong Li, Dongrong Sun, Liyun Liu, Qing Comparative study on twinning characteristics during two post-weld compression paths and their effects on joint enhancement |
title | Comparative study on twinning characteristics during two post-weld compression paths and their effects on joint enhancement |
title_full | Comparative study on twinning characteristics during two post-weld compression paths and their effects on joint enhancement |
title_fullStr | Comparative study on twinning characteristics during two post-weld compression paths and their effects on joint enhancement |
title_full_unstemmed | Comparative study on twinning characteristics during two post-weld compression paths and their effects on joint enhancement |
title_short | Comparative study on twinning characteristics during two post-weld compression paths and their effects on joint enhancement |
title_sort | comparative study on twinning characteristics during two post-weld compression paths and their effects on joint enhancement |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5180087/ https://www.ncbi.nlm.nih.gov/pubmed/28008982 http://dx.doi.org/10.1038/srep39779 |
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