Prediction of Transient Temperature Distributions for Laser Welding of Dissimilar Metals

Distribution of temperature during the welding process is essential for predicting and realizing some important features such as microstructure welds, heat-affected zone (HAZ), residual stresses, their effects. In this paper, a numerical model was developed using COMSOL Multiphysics dissimilar laser (butt joint) AISI 316L Ti6Al4V thin sheet 2.5 mm thickness. A continuous mode (CW) fiber heat source 300 W power used present study. time-dependent prediction distributions attempted. The assumed Hermit–Gaussian analytical function with moving velocity 120 mm/min. Both convective radiant loss phase change materials were considered analysis. addition, variation temperature-dependent material properties also considered. maximum minimum two at different times in penetration depths predicted. It found that average can be achieved bottom-most surface near weld line more than 2400 K, which justifies penetration. Averages temperatures on spot irradiation identified 3000 K.The fluctuation minimal decreased traverse direction. Scanning displaced relative to interface toward side reduces HAZ side. All these predictions agree well experimental results reported current literature studies.