Author : Mohammad Jameel Zedan and Qasim M. Doos

The resistance spot welding is adopted to joint dissimilar alloys such as aluminum alloy 5052, and low carbon steel
alloy 1008. In this work, the electrodes force 2100-2700 N, the welding current 7.5-10.5 KA, and welding time 10-20
cycle have been used. The relationships between the three parameters have been studied. The maximum tensile shear load of the aluminum alloy 5052-low carbon steel 1008 joint has been found equal to 2860 N for weld nugget diameter of 9 mm. The intermetallic compound layer (IMC) with 2-8 μm thickness with tongue-like has been
appeared adjacent to the 1008 low carbon steel side, whereas a needle-shaped IMC layer adjacent to the aluminum
alloy 5052 side.

Keywords: Resistance spot welding, Dissimilar alloys welded joints, nugget diameter, Interfacial microstructure

Article published in International Journal of Current Engineering and Technology, Vol.8, No.2 (March/April 2018)