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

Abstract 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...

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Autores principales:	Jing Li, Jialin Wu, Li Jin, Mert Celikin, Fenghua Wang, Shuai Dong, Jie Dong
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/813178d3c90e4ff7ab97c3824fbec421
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spelling	oai:doaj.org-article:813178d3c90e4ff7ab97c3824fbec4212021-12-02T10:44:14ZThe role of dislocation-solute interactions on the creep behaviour of binary Mg–RE alloys10.1038/s41598-021-82517-52045-2322https://doaj.org/article/813178d3c90e4ff7ab97c3824fbec4212021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82517-5https://doaj.org/toc/2045-2322Abstract 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.Jing LiJialin WuLi JinMert CelikinFenghua WangShuai DongJie DongNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jing Li Jialin Wu Li Jin Mert Celikin Fenghua Wang Shuai Dong Jie Dong The role of dislocation-solute interactions on the creep behaviour of binary Mg–RE alloys
description	Abstract 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.
format	article
author	Jing Li Jialin Wu Li Jin Mert Celikin Fenghua Wang Shuai Dong Jie Dong
author_facet	Jing Li Jialin Wu Li Jin Mert Celikin Fenghua Wang Shuai Dong Jie Dong
author_sort	Jing Li
title	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_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_sort	role of dislocation-solute interactions on the creep behaviour of binary mg–re alloys
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/813178d3c90e4ff7ab97c3824fbec421
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The role of dislocation-solute interactions on the creep behaviour of binary Mg–RE alloys

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