Modeling of Melting, Evaporating, and Resolidifying Procedure in Laser-Induced Metal Processing

Abstract

In this paper, we present a one-dimensional (1D) melting, evaporating, and resolidifying model describing the interaction of a scanning laser beam with a metal surface wherein the continuous and stepwise heat flux is applied. One set of 1D conduction equations, which is valid in all phases including solid, liquid, and vapor, has been developed along with two phase boundary conditions between the solid/liquid and liquid/air using an appropriate scaling law. The 1D heat equation has been solved separately in each phase using a sharp interface temperature technique based on the front tracking method. The generalized relations of nondimensional maximum melting depth, final evaporation depth, and maximum melting time related to nondimensional interaction time and heat flux factor are established.