Optimization of electrical parameters in Resistance Spot Welding of dissimilar joints of micro-alloyed steels TRIP sheets

The Resistance Spot Welding (RSW) process in dissimilar joints of micro-alloyed steels TRIP (Transformation Induced Plasticity) sheets was herein optimizing. The welding electrical parameters (time and current intensity) had an important effect in the final Shear Tensile Resistance of these kind of joints. Taguchi Design of Experiments was employed in order to optimize the process by the signal-to-noise ratio. Furthermore ANOVA analysis determined the relevance of each parameter in the final mechanical resistance of the welds. The optimum welding conditions were established inside the lobe curve that maximize the response of the experiment.