Numerical thermodynamic field modeling of a metallic substance during laser welding

During the laser welding process by a laser source, the interaction of the laser beam with material induces very rapid heating and fusion of a thin layer of material near the surface, involving high temperatures which can lead to mechanical and metallurgical consequences occurring in the heat affected zone. The study of this process is necessary to predict the optimal conditions leading to the improvement of the quality of the joint of welding. The purpose of this paper is, to develop a simplified numerical model which predicts the molten zone thermodynamics, resulting from laser irradiation. The numerical study of the problem proposed allows us to predict the thermal and dynamic characteristics of the molten zone, as well as to relate the processing parameters to the form and dimension of the molten zone, and the effect of the laser speed welding and the laser power.