Martensite decomposition under thermal-mechanical coupling conditions to fabricate an ultrafine-grained Ti6Al4Mo4Zr1W0.2Si alloy

doi:10.1016/j.jmst.2023.05.052

IMR OpenIR

	Martensite decomposition under thermal-mechanical coupling conditions to fabricate an ultrafine-grained Ti6Al4Mo4Zr1W0.2Si alloy
	Zhou, Taoyu 1,2; Yang, Jiuxu 1; Li, Nan 1,2; Sun, Hao 1; Zhang, Bohua 1,2; Zhao, Zibo 1; Wang, Qingjiang 1
通讯作者	Zhao, Zibo(zbzhao@imr.ac.cn)
	2024
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	168 页码:157-168
摘要	The fabrication of ultrafine-grained microstructures (grain size below 1 & mu;m) in titanium alloys is beneficial for improving their mechanical properties at room temperature and medium temperatures (400-550 & DEG;C). However, a long-standing challenge involves the low-cost manufacturing of bulk ultrafine-grained titanium alloys. In this work, we developed a facile strategy through martensite decomposition at thermal-mechanical coupling conditions, to fabricate an equiaxed microstructure in a Ti6Al4Mo4Zr1W0.2Si model alloy with an average a grain size of 315 & PLUSMN; 62 nm. The formation of the ultrafine-grained microstructure was because the lattice strain stored in the martensitic initial microstructure enhanced the nucleation rate of dynamic recrystallization, meanwhile, the pinning role of martensite decomposition products fi and (Ti, Zr) 5 Si 3 phases suppressed grain coarsening at high temperatures. Compared to conventional ( a+ fi) alloys, the tensile strength of this alloy improved by 20%-30% at both room temperature and 550 & DEG;C, without decreasing its ductility. In situ SEM observations revealed that the ultrafine-grained microstructure would not only suppress dislocation motions but also contribute to the homogenous deformation in the matrix of the material, therefore, it resulted in higher mechanical performance. The research results may be of great significance to the development of next-generation aviation titanium alloys. & COPY; 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Ultrafine-grained Titanium alloy In situ observation Deformation mechanism Thermostability
资助者	Youth Innovation Promotion Association CAS ; CAS Project for Young Scientists in Basic Research ; National Science and Technol-ogy Major Project
DOI	10.1016/j.jmst.2023.05.052
收录类别	SCI
语种	英语
资助项目	Youth Innovation Promotion Association CAS[2020193] ; CAS Project for Young Scientists in Basic Research[YSBR-025] ; National Science and Technol-ogy Major Project[J2019-VI-0 0 05-0119]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001052296100001
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：3[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/321006/178877
专题	中国科学院金属研究所
通讯作者	Zhao, Zibo
作者单位	1.Chinese Acad Sci, Inst Met Res, Shichangxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Taoyu,Yang, Jiuxu,Li, Nan,et al. Martensite decomposition under thermal-mechanical coupling conditions to fabricate an ultrafine-grained Ti6Al4Mo4Zr1W0.2Si alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2024,168:157-168.
APA	Zhou, Taoyu.,Yang, Jiuxu.,Li, Nan.,Sun, Hao.,Zhang, Bohua.,...&Wang, Qingjiang.(2024).Martensite decomposition under thermal-mechanical coupling conditions to fabricate an ultrafine-grained Ti6Al4Mo4Zr1W0.2Si alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,168,157-168.
MLA	Zhou, Taoyu,et al."Martensite decomposition under thermal-mechanical coupling conditions to fabricate an ultrafine-grained Ti6Al4Mo4Zr1W0.2Si alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 168(2024):157-168.