Superplastic deformation behavior of lamellar microstructure in a hydrogenated friction stir welded Ti-6Al-4V joint

doi:10.1016/j.jallcom.2019.02.182

IMR OpenIR

	Superplastic deformation behavior of lamellar microstructure in a hydrogenated friction stir welded Ti-6Al-4V joint
	Wu, L. H.1; Jia, C. L.1; Han, S. C.1; Li, N.1; Ni, D. R.1; Xiao, B. L.1; Ma, Z. Y.1; Fu, M. J.2; Wang, Y. Q.2; Zeng, Y. S.2
通讯作者	Ma, Z. Y.(zyma@imr.ac.cn) ; Zeng, Y. S.(yszeng@hotmail.com)
	2019-05-30
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	787 页码:1320-1326
摘要	It is rather difficult for Ti alloy welds to be superplastic formed due to their low superplasticity and high flow stress. In this study, the Ti-6Al-4V alloy after hydrogenation with 0.2 wt% hydrogen was subjected to friction stir welding (FSW). The superplastic behavior of the FSW joint was investigated. The stir zone with a fine lamellar microstructure exhibited a largest elongation of 660% at 825 degrees C and 3 x 10(-3) s(-1). Besides, the stir zone showed a similar superplasticity of close to 600% to the base material at 825 degrees C, 3 x 10(-4) -1 x 10(-3) s(-1). It is the first report on the superplasticity of FSW Ti alloy joints with hydrogenation. Compared to the FSW Ti-6Al-4V alloy joint without hydrogenation, the hydrogenated FSW joint showed superior superplastic properties, including a high elongation, less than a half flow stress and lower superplastic temperature. These superior superplastic properties were mainly attributed to the globularization of the lamellar microstructure and the high fraction of beta phase induced by the hydrogen element. This study provides an effective way to reduce the difficulty of practical superplastic forming for Ti alloy welds, although a dehydrogenation process is still needed to avoid hydrogen embrittlement. (C) 2019 Elsevier B.V. All rights reserved.
关键词	Ti alloys Friction stir welding Superplasticity Hydrogenation Globularization
资助者	National Natural Science Foundation of China ; IMR SYNL-T.S. Ke Research Fellowship
DOI	10.1016/j.jallcom.2019.02.182
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51601194] ; National Natural Science Foundation of China[51471171] ; National Natural Science Foundation of China[51331008] ; IMR SYNL-T.S. Ke Research Fellowship
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000462592500150
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：27[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/321006/132694
专题	中国科学院金属研究所
通讯作者	Ma, Z. Y.; Zeng, Y. S.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Avic Mfg Technol Inst, 1 Dongjunzhuang Rd, Beijing 100024, Peoples R China
推荐引用方式 GB/T 7714	Wu, L. H.,Jia, C. L.,Han, S. C.,et al. Superplastic deformation behavior of lamellar microstructure in a hydrogenated friction stir welded Ti-6Al-4V joint[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,787:1320-1326.
APA	Wu, L. H..,Jia, C. L..,Han, S. C..,Li, N..,Ni, D. R..,...&Zeng, Y. S..(2019).Superplastic deformation behavior of lamellar microstructure in a hydrogenated friction stir welded Ti-6Al-4V joint.JOURNAL OF ALLOYS AND COMPOUNDS,787,1320-1326.
MLA	Wu, L. H.,et al."Superplastic deformation behavior of lamellar microstructure in a hydrogenated friction stir welded Ti-6Al-4V joint".JOURNAL OF ALLOYS AND COMPOUNDS 787(2019):1320-1326.