The role of dislocation-solute interactions on the creep behaviour of binary Mg–RE alloys

The effect of dislocation-RE atoms interactions on the creep behaviour has been studied via creep testing and HAADF-STEM analysis of two extruded alloys; Mg–0.5Ce and Mg–2Gd (wt%). Almost no Ce atoms are detected in the Mg matrix due to the low solid solubility and faster diffusion rate in as-extrud...

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Autores principales: Li, Jing, Wu, Jialin, Jin, Li, Celikin, Mert, Wang, Fenghua, Dong, Shuai, Dong, Jie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7859206/
https://www.ncbi.nlm.nih.gov/pubmed/33536569
http://dx.doi.org/10.1038/s41598-021-82517-5
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author Li, Jing
Wu, Jialin
Jin, Li
Celikin, Mert
Wang, Fenghua
Dong, Shuai
Dong, Jie
author_facet Li, Jing
Wu, Jialin
Jin, Li
Celikin, Mert
Wang, Fenghua
Dong, Shuai
Dong, Jie
author_sort Li, Jing
collection PubMed
description The effect of dislocation-RE atoms interactions on the creep behaviour has been studied via creep testing and HAADF-STEM analysis of two extruded alloys; Mg–0.5Ce and Mg–2Gd (wt%). Almost no Ce atoms are detected in the Mg matrix due to the low solid solubility and faster diffusion rate in as-extruded condition. However, Gd solute segregations are observed along dislocations and hexagonal dislocation patterns. Such segregations can not only pin the dislocation motion and enhance the creep strengthening via dislocation patterns, but also lead to dynamic precipitation. Thus, combing with the stress exponent values, the transition of creep mechanism between Mg–0.5Ce alloys and Mg–2Gd alloys has been found and dislocation-Gd atoms interactions are determined to be the main factor for superior creep resistance of Mg–2Gd alloys.
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spelling pubmed-78592062021-02-04 The role of dislocation-solute interactions on the creep behaviour of binary Mg–RE alloys Li, Jing Wu, Jialin Jin, Li Celikin, Mert Wang, Fenghua Dong, Shuai Dong, Jie Sci Rep Article The effect of dislocation-RE atoms interactions on the creep behaviour has been studied via creep testing and HAADF-STEM analysis of two extruded alloys; Mg–0.5Ce and Mg–2Gd (wt%). Almost no Ce atoms are detected in the Mg matrix due to the low solid solubility and faster diffusion rate in as-extruded condition. However, Gd solute segregations are observed along dislocations and hexagonal dislocation patterns. Such segregations can not only pin the dislocation motion and enhance the creep strengthening via dislocation patterns, but also lead to dynamic precipitation. Thus, combing with the stress exponent values, the transition of creep mechanism between Mg–0.5Ce alloys and Mg–2Gd alloys has been found and dislocation-Gd atoms interactions are determined to be the main factor for superior creep resistance of Mg–2Gd alloys. Nature Publishing Group UK 2021-02-03 /pmc/articles/PMC7859206/ /pubmed/33536569 http://dx.doi.org/10.1038/s41598-021-82517-5 Text en © The Author(s) 2021 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Li, Jing
Wu, Jialin
Jin, Li
Celikin, Mert
Wang, Fenghua
Dong, Shuai
Dong, Jie
The role of dislocation-solute interactions on the creep behaviour of binary Mg–RE alloys
title The role of dislocation-solute interactions on the creep behaviour of binary Mg–RE alloys
title_full The role of dislocation-solute interactions on the creep behaviour of binary Mg–RE alloys
title_fullStr The role of dislocation-solute interactions on the creep behaviour of binary Mg–RE alloys
title_full_unstemmed The role of dislocation-solute interactions on the creep behaviour of binary Mg–RE alloys
title_short The role of dislocation-solute interactions on the creep behaviour of binary Mg–RE alloys
title_sort role of dislocation-solute interactions on the creep behaviour of binary mg–re alloys
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7859206/
https://www.ncbi.nlm.nih.gov/pubmed/33536569
http://dx.doi.org/10.1038/s41598-021-82517-5
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