A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium

Stress localization ahead of a slip band blocked by a grain boundary is measured for three different grain boundaries in unalloyed Mg using high-resolution electron backscatter diffraction (HR-EBSD). The results are compared with a theoretical dislocation pile-up model, from which slip system resist...

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Autores principales: Andani, Mohsen Taheri, Lakshmanan, Aaditya, Karamooz-Ravari, Mohammadreza, Sundararaghavan, Veera, Allison, John, Misra, Amit
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7033223/
https://www.ncbi.nlm.nih.gov/pubmed/32080234
http://dx.doi.org/10.1038/s41598-020-59684-y
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author Andani, Mohsen Taheri
Lakshmanan, Aaditya
Karamooz-Ravari, Mohammadreza
Sundararaghavan, Veera
Allison, John
Misra, Amit
author_facet Andani, Mohsen Taheri
Lakshmanan, Aaditya
Karamooz-Ravari, Mohammadreza
Sundararaghavan, Veera
Allison, John
Misra, Amit
author_sort Andani, Mohsen Taheri
collection PubMed
description Stress localization ahead of a slip band blocked by a grain boundary is measured for three different grain boundaries in unalloyed Mg using high-resolution electron backscatter diffraction (HR-EBSD). The results are compared with a theoretical dislocation pile-up model, from which slip system resistance and micro-Hall–Petch coefficients for different grain boundary types are deduced. The results indicate that grain boundary character plays a crucial role in determining micro-Hall–Petch coefficients, which can be used to strengthen classical crystal plasticity constitutive models to make predictions linked to the effect of grain boundary strengthening.
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spelling pubmed-70332232020-02-28 A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium Andani, Mohsen Taheri Lakshmanan, Aaditya Karamooz-Ravari, Mohammadreza Sundararaghavan, Veera Allison, John Misra, Amit Sci Rep Article Stress localization ahead of a slip band blocked by a grain boundary is measured for three different grain boundaries in unalloyed Mg using high-resolution electron backscatter diffraction (HR-EBSD). The results are compared with a theoretical dislocation pile-up model, from which slip system resistance and micro-Hall–Petch coefficients for different grain boundary types are deduced. The results indicate that grain boundary character plays a crucial role in determining micro-Hall–Petch coefficients, which can be used to strengthen classical crystal plasticity constitutive models to make predictions linked to the effect of grain boundary strengthening. Nature Publishing Group UK 2020-02-20 /pmc/articles/PMC7033223/ /pubmed/32080234 http://dx.doi.org/10.1038/s41598-020-59684-y Text en © The Author(s) 2020 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/.
spellingShingle Article
Andani, Mohsen Taheri
Lakshmanan, Aaditya
Karamooz-Ravari, Mohammadreza
Sundararaghavan, Veera
Allison, John
Misra, Amit
A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium
title A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium
title_full A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium
title_fullStr A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium
title_full_unstemmed A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium
title_short A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium
title_sort quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7033223/
https://www.ncbi.nlm.nih.gov/pubmed/32080234
http://dx.doi.org/10.1038/s41598-020-59684-y
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