Prediction and finite element analysis of the mechanical properties of heat affected zone of laser welded blanks

The weighted average method is proposed to describethe relationship between the heat affected zone (HAZ) of laser tailor-welded blanks, the base metal and the weld.Based on the uniaxial tensile test, the mechanical properties of the base material and the weld were obtained. The prediction model is developed to determine the performance of the HAZ by ABAQUS software. By comparing the simulation results and the test, a reasonable weighting coefficient is determined, and the FEA model reliability is also proved.In addition, the performance of the HAZis also obtained by the mixing rule method, which is compared with the results by the weighted average method. There are only litter difference between the prediction results and the experiment. The prediction results by the weighted average method are closer to the test.