Physical and Mathematical Modeling of the Phase Transition of a Composite Body during Layer-by-Layer Laser Melting

Abstract

The work is devoted to modeling the phase transition in a composite body during layer-by-layer laser melting. Evaluation of the phase transition is extremely important when selecting modes for layer-by-layer laser melting technology. Incomplete phase transition of the powder composition leads to the appearance of significant defects: lack of melting, pores, and deviations of geometry from the original geometry. The simulation is carried out by solving a nonstationary heat conduction problem for a two-layer plate under the influence of a heat flow, taking into account the phase transition. The calculation is carried out for the most common component—steel. Various thermal conditions are analyzed.