Numerical Simulation and Experimental Analysis of Thermal Cycles and Phase Transformation Behavior of Laser-Welded Advanced Multiphase Steel

This work presents the results of comparison between simulations and experiments laser welding advanced multiphase steel. The numerical with different parameters were carried out using Sysweld software. geometry weld structural constituents as well stress distributions analyzed. simulated thermal cycles incorporated in JMatPro software to determine phase transformation kinetics during cooling. experimental tests performed compare real results. According them, shape its width symmetrical according axis. values higher compared one at heat inputs than 0.048 kJ/mm. microstructure investigations conducted scanning electron microscopy showed a good agreement fusion zone. Some differences heat-affected zone transition identified. simulations, should be composed only martensite. was martensite some fraction bainite affected more complex consisting ferrite, retained austenite present measured hardness indicated difference 17 HV0.1.