| 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 | |
| Corresponding Author | Ma, Z. Y.(zyma@imr.ac.cn) ; Zeng, Y. S.(yszeng@hotmail.com) |
| 2019-05-30 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 787Pages:1320-1326 |
| Abstract | 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. |
| Keyword | Ti alloys Friction stir welding Superplasticity Hydrogenation Globularization |
| Funding Organization | National Natural Science Foundation of China ; IMR SYNL-T.S. Ke Research Fellowship |
| DOI | 10.1016/j.jallcom.2019.02.182 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000462592500150 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/132694 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Ma, Z. Y.; Zeng, Y. S. |
| Affiliation | 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 |
| Recommended Citation 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. |
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