Abstract
In this article, the AZ31B/2024-T4 T-lap joint was successfully fabricated by friction stir welding (FSW) with different welding parameters. The defect characteristics and metallurgical structure were observed and analyzed using optical microscope and scanning electron microscopy. Besides, the effects of defects and welding parameters on mechanical properties were investigated. The results show that an effective metallurgical reaction zone can be formed between Mg and Al (Mg–Al MRZ). The T-joints without tunnel defects can be obtained and the excellent mechanical properties of the T-joint are achieved using the welding speed of 50 mm/min. The tensile strength along the skin and the stringer is mainly affected by the kiss bonding defects. The maximum tensile strength of the joint reaches 92% of the base metal.
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Acknowledgements
Funding: This study work was funded by the Graduate Innovation Base (Laboratory) Open Fund of Nanjing University of Aeronautics and Astronautics (No. kfjj20190607). This work was also supported by the College Students’ Innovative Entrepreneurial Training Plan Program.
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Sun, T., Wu, S., Shen, Y. et al. Investigation on Friction Stir Welding of Mg/Al T-Joints. Trans Indian Inst Met 74, 3045–3061 (2021). https://doi.org/10.1007/s12666-020-02148-8
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DOI: https://doi.org/10.1007/s12666-020-02148-8