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Temperature-gradient induced microstructure evolution in heat-affected zone of electron beam welded Ti-6Al-4V titanium alloy

文献类型：期刊论文

作者Zhang, Shilin1,2; Ma, Yingjie1,2; Huang, Sensen2,3,4; Youssef, Sabry S.1,2; Qi, Min1,2; Wang, Hao1,2; Qiu, Jianke1,2; Lei, Jiafeng1,2; Yang, Rui1,2
刊名JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
出版日期2019-08-01
卷号35期号:8页码:1681-1690
关键词Ti-6Al-4V Electron beam welding HAZ Element distribution Texture
ISSN号1005-0302
DOI10.1016/j.jmst.2019.04.004
通讯作者Ma, Yingjie(yjma@imr.ac.cn) ; Lei, Jiafeng(jflei@imr.ac.cn)
英文摘要The heat-affected zone (HAZ) of electron beam welded (EBW) joint normally undergoes a unique heat-treating process consisting of rapid temperature rising and dropping stages, resulting in temperature-gradient in HAZ as a function of the distance to fusion zone (FZ). In the current work, microstructure, elements distribution and crystallographic orientation of three parts (near base material (BM) zone, mid-HAZ and near-FZ) in the HAZ of Ti-6Al-4V alloy were systematically investigated. The microstructure observation revealed that the microstructural variation from near-BM to near-FZ included the reduction of primary alpha (alpha(p)) grains, the increase of transformed beta structure (beta(t)) and the formation of various a structures. The rim-alpha, dendritic a and abnormal secondary alpha (alpha(s)) colonies formed in the mid-HAZ, while the "ghost" structures grew in the near-FZ respectively. The electron probe microanalyzer (EPMA) and electron back-scattered diffraction (EBSD) technologies were employed to evaluate the elements diffusion and texture evolution during the unique thermal process of welding. The formation of the various a structures in the HAZ were discussed based on the EPMA and EBSD results. Finally, the nanoindentation hardness of "ghost" structures was presented and compared with nearby beta(t) regions. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDB06050100] ; Natural Key Research and Development Program of China[2016YFC0304201] ; Natural Key Research and Development Program of China[2016YFC0304206] ; Natural Science Foundation of China[51871225]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000470677300020
出版者JOURNAL MATER SCI TECHNOL
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; Natural Key Research and Development Program of China ; Natural Science Foundation of China
源URL[http://ir.imr.ac.cn/handle/321006/133843]  
专题金属研究所_中国科学院金属研究所
通讯作者Ma, Yingjie; Lei, Jiafeng
作者单位1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
3.Northeastern Univ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Liaoning, Peoples R China
4.Northeastern Univ, Sch Mat & Engn, Shenyang 110819, Liaoning, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Shilin,Ma, Yingjie,Huang, Sensen,et al. Temperature-gradient induced microstructure evolution in heat-affected zone of electron beam welded Ti-6Al-4V titanium alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(8):1681-1690.
APA Zhang, Shilin.,Ma, Yingjie.,Huang, Sensen.,Youssef, Sabry S..,Qi, Min.,...&Yang, Rui.(2019).Temperature-gradient induced microstructure evolution in heat-affected zone of electron beam welded Ti-6Al-4V titanium alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(8),1681-1690.
MLA Zhang, Shilin,et al."Temperature-gradient induced microstructure evolution in heat-affected zone of electron beam welded Ti-6Al-4V titanium alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.8(2019):1681-1690.

入库方式： OAI收割

来源：金属研究所

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