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
通讯作者	Qiu, Jianke(jkqiu@imr.ac.cn) ; Lei, Jiafeng(jflei@imr.ac.cn)
	2023-11-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	27 页码:1579-1592
摘要	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/).
关键词	Titanium alloy Room temperature creep Dislocation Low angle grain boundary Transmission electron microscope
资助者	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
收录类别	SCI
语种	英语
资助项目	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研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001101732900001
出版者	ELSEVIER
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177404
专题	中国科学院金属研究所
通讯作者	Qiu, Jianke; Lei, Jiafeng
作者单位	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
推荐引用方式 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.