Journal
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 17, Issue -, Pages 467-477Publisher
ELSEVIER
DOI: 10.1016/j.jmrt.2022.01.037
Keywords
Microstructure; Mechanical properties; Ultrasonic assistance; Magnesium; Titanium
Funding
- Yangtze Normal University [0107/011160023]
- Chongqing Municipal Education Commission [KJQN201901416]
- Natural Science Foundation of Chongqing [cstc2021ycjh-bgzxm0185]
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In this study, ultrasonic vibration assistance (UVA) treatment was applied to improve the microstructure, corrosion resistance, and mechanical properties of Ti/Mg dissimilar metal joints. The UVA process successfully refined the coarse grains in the weld zone, resulting in the formation of a more tenacious and adherent protective layer and a reduced corrosion rate. Under the optimized ultrasonic parameters, the mechanical property of the Ti/Mg joint was improved by 11.4% compared to joints without ultrasonic treatment.
In order to refine microstructures, enhance corrosion resistance and mechanical properties of Ti/Mg joints, the ultrasonic vibration assistance (UVA) treatment were applied during the welding-brazing of Ti/Mg dissimilar metal. The specific impacts and mechanisms of UVA on the microstructure evolution and mechanical enhancement were investigated. The experiment results express that with the aid of UVA process, the coarse grains in weld zone were effectively refined attributed to ultrasonic induced acoustic streaming and cavitation effects. Meanwhile more tenacious and adherent protective layer of Mg(OH)(2) occurred and reduced corrosion rate of weld zone. Under the optimized ultrasonic parameter of 1.2 kW, the mechanical property of Ti/Mg joint was improved 11.4% to 225 MPa, compared with joints without the aid of ultrasonic treatment. (c) 2022 The Authors. Published by Elsevier B.V.
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