Effects of V/Nb Composite Interlayer on Microstructure and Mechanical Properties of NiTi Alloy/ Stainless Steel Dissimilar Metal Laser Welding

被引：0
|
作者：
Wang X. [1 ,2 ]
Gao X. [3 ,4 ]
Liu J. [3 ,4 ]
Li L. [3 ,4 ]
机构：
[1] College of Mechanical and Electronic Engineering, Xinjiang Institute of Engineering, Urumqi
[2] Laser Intelligent Manufacturing and Remanufacturing Engineering Technology Research Center, Xinjiang Institute of Engineering, Urumqi
[3] School of Mechanical Engineering, Baoji University of Arts and Sciences, Baoji
[4] Shaanxi Province Key Laboratory of Advanced Manufacturing and Evaluation of Robot Key Components, Baoji
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2022年 / 58卷 / 08期
关键词：
301; SS; Interlayer; Intermetallic compounds; Joint properties; NiTi alloy;
D O I：
10.3901/JME.2022.08.136
中图分类号：
学科分类号：
摘要：
To prevent the formation of brittle intermetallic compounds such as Ti-Fe and Ti-Ni, the dissimilar metal of NiTi alloy and 301 SS were welded by V/Nb multi-interlayer and double laser welding. The microstructures and mechanical properties of the joints were studied by means of optical microscopy, scanning electron microscopy and energy dispersive spectrometer (EDS). The results show that the mixing of NiTi alloy and 301 SS is prevented by the presence of unmelted V and Nb during welding processing, thus no brittle intermetallic compounds such as Ti-Fe and Ti-Ni are formed in the joints. The maximum tensile strength of the joints increased to 280 MPa. The 301 SS and V were joined by fusion welding for first pass welding, while the two metallurgical bonding zones based on different bonding mechanisms were obtained in the second pass welding. V and Nb was joined by the fusion welding mechanism, and contact reaction brazing was responsible for bonding Nb and NiTi. © 2022 Journal of Mechanical Engineering.
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页码：136 / 142
页数：6
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