Uncovering the hierarchical clusters in the heat-affected zone of an electron beam welded<i> &alpha;/&beta; </i>titanium alloy joint

doi:10.1016/j.jmst.2023.07.038

IMR OpenIR

	Uncovering the hierarchical clusters in the heat-affected zone of an electron beam welded α/β titanium alloy joint
	Xu, C.1,2; Shao, X. H.1,2; Yang, H. J.1,3; Lv, M.1,2; Liu, H. Q.4; Ma, X. L.1,5
通讯作者	Shao, X. H.(xhshao@imr.ac.cn) ; Liu, H. Q.(liu.hq@foxmail.com)
	2024-03-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	174 页码:120-132
摘要	Using high-resolution transmission Kikuchi diffraction (TKD) and transmission electron microscopy (TEM), we examined the hierarchical clusters that form in situ in the heat-affected zone (HAZ), which are commonly referred to as "ghost" structures, of bimodal titanium alloy Ti-5Al-2Sn-2Zr-4Mo-4Cr (wt%, TC17). The ghost structures are enriched with Al elements but poor in Mo and Cr compared to the surrounding & beta; matrix. TKD results show that the ghost structure in middle-HAZ mainly consists of & alpha;L laths with a high-angle grain boundary, which exhibits the classic Burgers orientation relationship (BOR) with the host matrix, while it encircles the & alpha;P grains in far-HAZ. And the ghost structure is evidenced to form via in-complete martensitic transformation. TEM results further confirm that the ghost structure is composed of & alpha;L and tiny & beta;L laths with BOR, with the former being enriched with Al and poor with Cr and Mo, while the latter is the opposite. Interestingly, two & alpha;L variant clusters with a check-mark morphology are frequently observed viewed along [0 0 01]& alpha;L//[110]& beta;L directions, which are dominated by the crystallographic and geometrical relationships between & alpha; and & beta; phases. Based on the microstructural characterization, it is hypothesized that the ghost structure is transformed from the initial & alpha;P phase, due to the coupling effect of high thermal stress (which induces the formation of a large number of dislocations) and element diffusion caused by sudden temperature increase and plunge cooling in the HAZ during the welding process.& COPY; 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	TC17 titanium alloy Electron beam welding (EBW) The ghost structure Transmission Kikuchi diffraction (TKD) Transmission electron microscopy (TEM)
资助者	ety for the Promotion of Science ; Natural Science Foundation of Liaoning Province
DOI	10.1016/j.jmst.2023.07.038
收录类别	SCI
语种	英语
资助项目	ety for the Promotion of Science[P20737] ; Natural Science Foundation of Liaoning Province[2023-MS-018]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001074498400001
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：2[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/321006/179174
专题	中国科学院金属研究所
通讯作者	Shao, X. H.; Liu, H. Q.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Suzhou Lab, Suzhou 215028, Peoples R China 4.Kyushu Univ, Dept Mech Engn, Fukuoka 8190395, Japan 5.Songshan Lake Mat Lab, Bay Area Ctr Electron Microscopy, Dongguan 523808, Peoples R China
推荐引用方式 GB/T 7714	Xu, C.,Shao, X. H.,Yang, H. J.,et al. Uncovering the hierarchical clusters in the heat-affected zone of an electron beam welded α/β titanium alloy joint[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2024,174:120-132.
APA	Xu, C.,Shao, X. H.,Yang, H. J.,Lv, M.,Liu, H. Q.,&Ma, X. L..(2024).Uncovering the hierarchical clusters in the heat-affected zone of an electron beam welded α/β titanium alloy joint.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,174,120-132.
MLA	Xu, C.,et al."Uncovering the hierarchical clusters in the heat-affected zone of an electron beam welded α/β titanium alloy joint".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 174(2024):120-132.