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

文献类型：期刊论文

作者Zhou, Taoyu1,2; Yang, Jiuxu2; Li, Nan1,2; Sun, Hao2; Zhang, Bohua1,2; Zhao, Zibo2; Wang, Qingjiang2
刊名JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
出版日期2024
卷号168页码:157-168
关键词Ultrafine-grained Titanium alloy In situ observation Deformation mechanism Thermostability
ISSN号1005-0302
DOI10.1016/j.jmst.2023.05.052
通讯作者Zhao, Zibo(zbzhao@imr.ac.cn)
英文摘要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.
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
语种英语
WOS记录号WOS:001052296100001
出版者JOURNAL MATER SCI TECHNOL
资助机构Youth Innovation Promotion Association CAS ; CAS Project for Young Scientists in Basic Research ; National Science and Technol-ogy Major Project
源URL[http://ir.imr.ac.cn/handle/321006/178876]  
专题金属研究所_中国科学院金属研究所
通讯作者Zhao, Zibo
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, Shichangxu Innovat Ctr Adv Mat, 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.

入库方式： OAI收割

来源：金属研究所

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