Room temperature creep mechanisms of Ti-6Al-4V ELI alloy with equiaxed microstructure under different applied stresses

doi:10.1016/j.jmrt.2023.10.001

IMR OpenIR

	Room temperature creep mechanisms of Ti-6Al-4V ELI alloy with equiaxed microstructure under different applied stresses
	Zhang, Mengmeng 1,2; Qiu, Jianke 1,2,3; Fang, Chao 1,2; Zhang, Mingjie 1,2; Ma, Yingjie 1,2,3; Yang, Zhiqing 4; Lei, Jiafeng 1,2,3; Yang, Rui 1,2,3
Corresponding Author	Qiu, Jianke(jkqiu@imr.ac.cn) ; Lei, Jiafeng(jflei@imr.ac.cn)
	2023-11-01
Source Publication	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
Volume	27 Pages:1579-1592
Abstract	Titanium alloys are often used to make deep-sea pressure hulls and the creep strain produced during service is nonnegligible. The variation of dislocation structures with room temperature creep stresses in equiaxed alpha grains of Ti-6Al-4V ELI alloy was examined using transmission electron microscope. The plastic deformation mechanism varied with the applied stress, mainly manifested by the change of dislocation patterns and the sequential activation of slip systems. At the stress below the creep threshold, even though almost no macroscopic creep was generated, a small number of immobile dislocations and dislocation networks occurred in the sample. The networks were composed of dislocations with different Burgers vectors, and part of them would evolve into low angle grain boundaries (LAGBs). At the stresses above the threshold, the density of dislocations in alpha grains increased with the stress level, and the basal , pyramidal and slips were activated successively which also contributed to creep and participated in the formation of LAGBs. Prismatic slip was always the predominant creep deformation mechanism for the studied stress range. The activation of difficult slip systems was attributed to the stress concentration and stress redistribution between soft and hard phases/grains. In general, the amount of LAGBs increased with the applied creep stress, but the LAGBs formed by dislocation networks decreased.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keyword	Titanium alloy Room temperature creep Dislocation Low angle grain boundary Transmission electron microscope
Funding Organization	CAS Project for Young Scientists in Basic Research ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Key R & D Program of China ; Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) ; Basic and Applied Basic Research Programme of Guangdong Province
DOI	10.1016/j.jmrt.2023.10.001
Indexed By	SCI
Language	英语
Funding Project	CAS Project for Young Scientists in Basic Research[YSBR-025] ; Youth Innovation Promotion Association CAS[2022188] ; National Natural Science Foundation of China[91960202] ; National Natural Science Foundation of China[51701219] ; National Key R & D Program of China[2021YFC2800503] ; National Key R & D Program of China[2022YFB3708300] ; Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)[311021013] ; Basic and Applied Basic Research Programme of Guangdong Province[2021B0301030003]
WOS Research Area	Materials Science ; Metallurgy & Metallurgical Engineering
WOS Subject	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS ID	WOS:001101732900001
Publisher	ELSEVIER
Citation statistics	Cited Times:4[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/177404
Collection	中国科学院金属研究所
Corresponding Author	Qiu, Jianke; Lei, Jiafeng
Affiliation	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519000, Peoples R China 4.Ji Hua Lab, Foshan 528200, Peoples R China
Recommended Citation GB/T 7714	Zhang, Mengmeng,Qiu, Jianke,Fang, Chao,et al. Room temperature creep mechanisms of Ti-6Al-4V ELI alloy with equiaxed microstructure under different applied stresses[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2023,27:1579-1592.
APA	Zhang, Mengmeng.,Qiu, Jianke.,Fang, Chao.,Zhang, Mingjie.,Ma, Yingjie.,...&Yang, Rui.(2023).Room temperature creep mechanisms of Ti-6Al-4V ELI alloy with equiaxed microstructure under different applied stresses.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,27,1579-1592.
MLA	Zhang, Mengmeng,et al."Room temperature creep mechanisms of Ti-6Al-4V ELI alloy with equiaxed microstructure under different applied stresses".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 27(2023):1579-1592.

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