Abstract
Lightweight magnesium (Mg) alloys are increasingly used in the transportation industries to reduce the weight of vehicles due to their high strength-to-weight ratio. The applications of Mg alloys inevitably involve welding and joining. Ultrasonic spot welding (USW), an emerging and promising solid-state joining technology, can be suitably applied to join Mg alloys. In this study a low rare-earth containing Mg alloy, ZEK100 with improved formability and corrosion resistance, was welded similarly (ZEK100-ZEK100) and dissimilarly (ZEK100-A15754) at varying levels of welding energy. It was observed that the interface grain size increased in the similar welding, while an intermetallic diffusion layer formed in the dissimilar welding and its thickness increased with increasing welding energy. The tensile lap shear strength first increased, reached its optimum value, and then decreased with increasing welding energy. The strength of dissimilar welds was about 75% of that of the magnesium similar welds.
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Macwan, A., Chen, D.L. (2016). Similar and Dissimilar Ultrasonic Spot Welding of a Rare-Earth Containing ZEK100 Magnesium Alloy. In: Singh, A., Solanki, K., Manuel, M.V., Neelameggham, N.R. (eds) Magnesium Technology 2016. Springer, Cham. https://doi.org/10.1007/978-3-319-48114-2_23
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DOI: https://doi.org/10.1007/978-3-319-48114-2_23
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48620-8
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