Multiphysics Modeling of Pulsed Nd-YAG Laser Welding Process for Thermal Field and Residual Stress Prediction

Abstract

This chapter presents multiphysics modeling approach of the laser welding process, with a focus on Nd-YAG pulsed laser welding applied to X30Cr13 stainless steel. The goal is to simulate the temperature field, predict the weld pool geometry and residual stress. The proposed model contributes to improving the reliability and performance of welded components in industrial applications. The interaction between the laser beam and the material is modeled through heat transfer equations with appropriate boundary conditions, incorporating material properties and laser as energy source. The numerical simulations are conducted using finite element analysis and are compared to experimental data. The results provide insights into temperature distribution, melt pool dynamics, and residual stress, offering a predictive tool for optimizing welding parameters and determining welding defects.