A Investigation of the Influence of Resistance Spot Welding Parameters on the Tensile Shear Strength of Dissimilar Joints between Aluminum Alloy and Low-Carbon Steel
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Abstract
This study aims to investigate the influence of resistance spot welding parameters on the tensile shear strength, fracture behavior, and crystal formation between 5052 aluminum alloy and SPFH 780 low-carbon alloy steel. The welding parameters included an upslope and downslope current time of 0 and 15 cycles, respectively, with electrode forces controlled at 0.075 MPa and 0.150 MPa. The results revealed that the condition yielding the highest tensile shear strength at the joint was an upslope current time of 15 cycles, a downslope current time of 0 cycles, and an electrode force of 0.075 MPa. Fracture behavior analysis indicated that the joint exhibiting the highest tensile shear strength demonstrated ductile fracture characteristics. Additionally, phase formation analysis revealed the presence of intermetallic compounds, including Al0.95Mg0.05, (Al0.5Cr0.5)Fe, Cr0.03Fe0.97 และ Fe2.99(Al0.441Si0.559)
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