Effect of solution heat treatment on creep properties of a nickel-based single crystal superalloy

A novel low-density nickel-based single-crystal superalloy was prepared and the effect of solution treatment on the creep deformation mechanism was systematically investigated. The results reveal that the creep life increases with the increase of solution treatment time, which can be ascribed to mic...

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Autores principales:	Yunling Du, Yanhong Yang, Aimin Diao, Yongmei Li, Xinguang Wang, Yizhou Zhou, Jinguo Li, Xiaofeng Sun
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Nickel-based single crystal superalloys Microstructural evolution Creep behavior Solution heat-treatment Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/c21eaf09e45642318942e12a8d3a0170
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spelling	oai:doaj.org-article:c21eaf09e45642318942e12a8d3a01702021-11-04T04:31:53ZEffect of solution heat treatment on creep properties of a nickel-based single crystal superalloy2238-785410.1016/j.jmrt.2021.10.078https://doaj.org/article/c21eaf09e45642318942e12a8d3a01702021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S223878542101214Xhttps://doaj.org/toc/2238-7854A novel low-density nickel-based single-crystal superalloy was prepared and the effect of solution treatment on the creep deformation mechanism was systematically investigated. The results reveal that the creep life increases with the increase of solution treatment time, which can be ascribed to microstructural homogenization. However, when the solution treatment time exceeds a threshold limit, the relative proportion of undesirable defects significantly increases, which accelerates the failure and compromises the creep life. The homogenization of the composition leads to the precipitation of a more homogenized γ′ phase and, in turn, results in a more uniform and dense dislocation network, thus hindering the dislocation movement and improving the creep life. The undesirable defects may lead to the stress concentration and weaken the effect of the dislocation network, thus accelerating the creep process and the dislocation are more likely to shear into the γ′ phase. In general, the current study provides guidance for selecting a more reasonable solution treatment time to improve the creep strength.Yunling DuYanhong YangAimin DiaoYongmei LiXinguang WangYizhou ZhouJinguo LiXiaofeng SunElsevierarticleNickel-based single crystal superalloysMicrostructural evolutionCreep behaviorSolution heat-treatmentMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 4702-4713 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Nickel-based single crystal superalloys Microstructural evolution Creep behavior Solution heat-treatment Mining engineering. Metallurgy TN1-997
spellingShingle	Nickel-based single crystal superalloys Microstructural evolution Creep behavior Solution heat-treatment Mining engineering. Metallurgy TN1-997 Yunling Du Yanhong Yang Aimin Diao Yongmei Li Xinguang Wang Yizhou Zhou Jinguo Li Xiaofeng Sun Effect of solution heat treatment on creep properties of a nickel-based single crystal superalloy
description	A novel low-density nickel-based single-crystal superalloy was prepared and the effect of solution treatment on the creep deformation mechanism was systematically investigated. The results reveal that the creep life increases with the increase of solution treatment time, which can be ascribed to microstructural homogenization. However, when the solution treatment time exceeds a threshold limit, the relative proportion of undesirable defects significantly increases, which accelerates the failure and compromises the creep life. The homogenization of the composition leads to the precipitation of a more homogenized γ′ phase and, in turn, results in a more uniform and dense dislocation network, thus hindering the dislocation movement and improving the creep life. The undesirable defects may lead to the stress concentration and weaken the effect of the dislocation network, thus accelerating the creep process and the dislocation are more likely to shear into the γ′ phase. In general, the current study provides guidance for selecting a more reasonable solution treatment time to improve the creep strength.
format	article
author	Yunling Du Yanhong Yang Aimin Diao Yongmei Li Xinguang Wang Yizhou Zhou Jinguo Li Xiaofeng Sun
author_facet	Yunling Du Yanhong Yang Aimin Diao Yongmei Li Xinguang Wang Yizhou Zhou Jinguo Li Xiaofeng Sun
author_sort	Yunling Du
title	Effect of solution heat treatment on creep properties of a nickel-based single crystal superalloy
title_short	Effect of solution heat treatment on creep properties of a nickel-based single crystal superalloy
title_full	Effect of solution heat treatment on creep properties of a nickel-based single crystal superalloy
title_fullStr	Effect of solution heat treatment on creep properties of a nickel-based single crystal superalloy
title_full_unstemmed	Effect of solution heat treatment on creep properties of a nickel-based single crystal superalloy
title_sort	effect of solution heat treatment on creep properties of a nickel-based single crystal superalloy
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/c21eaf09e45642318942e12a8d3a0170
work_keys_str_mv	AT yunlingdu effectofsolutionheattreatmentoncreeppropertiesofanickelbasedsinglecrystalsuperalloy AT yanhongyang effectofsolutionheattreatmentoncreeppropertiesofanickelbasedsinglecrystalsuperalloy AT aimindiao effectofsolutionheattreatmentoncreeppropertiesofanickelbasedsinglecrystalsuperalloy AT yongmeili effectofsolutionheattreatmentoncreeppropertiesofanickelbasedsinglecrystalsuperalloy AT xinguangwang effectofsolutionheattreatmentoncreeppropertiesofanickelbasedsinglecrystalsuperalloy AT yizhouzhou effectofsolutionheattreatmentoncreeppropertiesofanickelbasedsinglecrystalsuperalloy AT jinguoli effectofsolutionheattreatmentoncreeppropertiesofanickelbasedsinglecrystalsuperalloy AT xiaofengsun effectofsolutionheattreatmentoncreeppropertiesofanickelbasedsinglecrystalsuperalloy
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Effect of solution heat treatment on creep properties of a nickel-based single crystal superalloy

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