Authors : Abdul-Raheem Kadhum A. Ali, Nawal Mohammed Dawood and Ahmed Saleh Al-Graite
Abstract: Increasing utilization of spot weld joints in engineering industry, especially in the automotive had led to need the deep knowledge of it. A 1 mm thickness of both mild steel and 304 stainless steel that was welded by spot welding at different condition. In spot welding process, the time and current of the welding were changed from (0.2-0.5 sec) and from (4-7 kA), respectively. The tensile-shear, coach-peel tests and failure modes of spot welding were investigated. Also, the optical microstructure and Vickers hardness were observed. The results showed the increase in welding current and time guide to increase the strength and hardness of the joints where the base metal hardness is lower about 2 times than the welded zone hardness. The joints strength at shear test is a higher than that at peel test and the pullout mode was showed in both the tensile-shear and peel test.
Abdul-Raheem Kadhum A. Ali, Nawal Mohammed Dawood and Ahmed Saleh Al-Graite, 2019. Mechanical Properties and Characterization of Similar and Dissimilar Spot Welding Joints. Journal of Engineering and Applied Sciences, 14: 5471-5478.