Microstructure and mechanical properties in electron beam scanning welded joints of super thick titanium alloy plates

doi:10.1016/j.jmrt.2024.08.077

IMR OpenIR

	Microstructure and mechanical properties in electron beam scanning welded joints of super thick titanium alloy plates
	Yang, F.1,2; Wu, L. H.1,2; Zhao, H. B.1; Li, N.1; Xue, P.1,2; Ni, D. R.1,2; Ma, Z. Y.1,2
通讯作者	Wu, L. H.(lhwu@imr.ac.cn) ; Ni, D. R.(drni@imr.ac.cn)
	2024-09-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	32 页码:2459-2473
摘要	It is generally difficult to obtain good weld formation and excellent properties in super thick titanium alloy joints via conventional electron beam welding (EBW) methods due to the fact that the melt pool flow becomes more unstable as the plate thickness increases. In this study, electron beam scanning welding (EBSW) was utilized to weld 100 mm Ti-6Al-3Nb-3Zr-1Mo titanium alloy plates to improve the weld formation and impact toughness through the scanning effect. The results revealed that there were spatter and cutting defects on the surface and inner pore defect in the normal EBW joint, which could be effectively eliminated via EBSW. The decrease of the amplitude of the fluid flow rate and the change of the velocity direction were mainly responsible for this. A large amount of lamellar alpha phase with similar orientation was formed in the fusion zone (FZ) due to the fast cooling rate. The joint coefficient for both EBSW and EBW reached 100%, with the joint tensile strength of similar to 840 MPa. The impact energy of the FZ in the EBSW joint was 70.5 J, reaching 210.4% of that of the BM (33.5 J). The impact toughness increase ratio in this study was far larger than those for Ti alloy welds ever reported, which was mainly attributed to that the high angle alpha colony boundaries with high preferred orientation in the FZ deflected the crack propagation direction. This study provides a reference for the strength-toughness design of EBWed joints of super thick Ti6331 titanium alloy.
关键词	Titanium alloys Electron beam welding Microstructure Mechanical properties Impact deformation
资助者	National Key Research and Devel-opment Program of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
DOI	10.1016/j.jmrt.2024.08.077
收录类别	SCI
语种	英语
资助项目	National Key Research and Devel-opment Program of China[2023YFC2810700] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2021193] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[Y2021061]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001301437400001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/189334
专题	中国科学院金属研究所
通讯作者	Wu, L. H.; Ni, D. R.
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yang, F.,Wu, L. H.,Zhao, H. B.,et al. Microstructure and mechanical properties in electron beam scanning welded joints of super thick titanium alloy plates[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,32:2459-2473.
APA	Yang, F..,Wu, L. H..,Zhao, H. B..,Li, N..,Xue, P..,...&Ma, Z. Y..(2024).Microstructure and mechanical properties in electron beam scanning welded joints of super thick titanium alloy plates.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,32,2459-2473.
MLA	Yang, F.,et al."Microstructure and mechanical properties in electron beam scanning welded joints of super thick titanium alloy plates".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 32(2024):2459-2473.