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Nano-scale characterisation of sheared β” precipitates in a deformed Al-Mg-Si alloy

This paper compares the nano-scale structure of β” precipitates in a peak-aged Al-Mg-Si alloy before and after deformation. Three complementary advanced transmission electron microscopy techniques are used to reveal the structures and elucidate the interaction between dislocations and β” precipitate...

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Autores principales: Christiansen, Emil, Marioara, Calin Daniel, Holmedal, Bjørn, Hopperstad, Odd Sture, Holmestad, Randi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6877512/
https://www.ncbi.nlm.nih.gov/pubmed/31767885
http://dx.doi.org/10.1038/s41598-019-53772-4
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author Christiansen, Emil
Marioara, Calin Daniel
Holmedal, Bjørn
Hopperstad, Odd Sture
Holmestad, Randi
author_facet Christiansen, Emil
Marioara, Calin Daniel
Holmedal, Bjørn
Hopperstad, Odd Sture
Holmestad, Randi
author_sort Christiansen, Emil
collection PubMed
description This paper compares the nano-scale structure of β” precipitates in a peak-aged Al-Mg-Si alloy before and after deformation. Three complementary advanced transmission electron microscopy techniques are used to reveal the structures and elucidate the interaction between dislocations and β” precipitates. We show that the needle-like and semi-coherent β” precipitates are sheared several times on different planes by dislocations during deformation, with no indications that they are bypassed or looped. Our results show that dislocations cut through precipitates and leave behind planar defects lying on planes inclined to 〈100〉 directions inside the precipitates. The results also indicate that precipitates are sheared in single steps, and the implication of this observation is discussed in terms of slip behaviour.
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spelling pubmed-68775122019-12-05 Nano-scale characterisation of sheared β” precipitates in a deformed Al-Mg-Si alloy Christiansen, Emil Marioara, Calin Daniel Holmedal, Bjørn Hopperstad, Odd Sture Holmestad, Randi Sci Rep Article This paper compares the nano-scale structure of β” precipitates in a peak-aged Al-Mg-Si alloy before and after deformation. Three complementary advanced transmission electron microscopy techniques are used to reveal the structures and elucidate the interaction between dislocations and β” precipitates. We show that the needle-like and semi-coherent β” precipitates are sheared several times on different planes by dislocations during deformation, with no indications that they are bypassed or looped. Our results show that dislocations cut through precipitates and leave behind planar defects lying on planes inclined to 〈100〉 directions inside the precipitates. The results also indicate that precipitates are sheared in single steps, and the implication of this observation is discussed in terms of slip behaviour. Nature Publishing Group UK 2019-11-25 /pmc/articles/PMC6877512/ /pubmed/31767885 http://dx.doi.org/10.1038/s41598-019-53772-4 Text en © The Author(s) 2019 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
Christiansen, Emil
Marioara, Calin Daniel
Holmedal, Bjørn
Hopperstad, Odd Sture
Holmestad, Randi
Nano-scale characterisation of sheared β” precipitates in a deformed Al-Mg-Si alloy
title Nano-scale characterisation of sheared β” precipitates in a deformed Al-Mg-Si alloy
title_full Nano-scale characterisation of sheared β” precipitates in a deformed Al-Mg-Si alloy
title_fullStr Nano-scale characterisation of sheared β” precipitates in a deformed Al-Mg-Si alloy
title_full_unstemmed Nano-scale characterisation of sheared β” precipitates in a deformed Al-Mg-Si alloy
title_short Nano-scale characterisation of sheared β” precipitates in a deformed Al-Mg-Si alloy
title_sort nano-scale characterisation of sheared β” precipitates in a deformed al-mg-si alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6877512/
https://www.ncbi.nlm.nih.gov/pubmed/31767885
http://dx.doi.org/10.1038/s41598-019-53772-4
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