Mehdi Safari - Assistant Professor, Department of Mechanical Engineering, Arak University of Technology, Arak, ۳۸۱۶۱-۴۱۱۶۷, Iran
Jalal Joudaki - Assistant Professor, Department of Mechanical Engineering, Arak University of Technology, Arak, ۳۸۱۶۱-۴۱۱۶۷, Iran

In this work, dissimilar resistance spot welding of AISI 316 stainless steel sheets is studied experimentally. Forthis purpose, effect of welding current on the fracture modes of resistance spot welded joints is investigated. It isconcluded that during the tensile-shear tests, three fracture modes are observed, namely partial interfacial, pullout andpullout with tearing of the sheet modes. The results show that tensile-shear strength of spot welds is increased withincreasing the welding current due to increase in the generated heat and consequently plastic deformation area.Therefore, with an increase in the welding current, fracture modes switch from partial interfacial mode to pullout modeand consequently pullout mode to pullout with tearing of the sheet mode.

Resistance spot welding, AISI 316 stainless steel, Welding current, Fracture mode