A computational model of melt pool morphology for selective laser melting process

Selective laser melting (SLM) is a promising metal additive manufacturing technology, which holds widespread applications in numerous fields. Unfortunately, it arduous to predict the real geometry of SLM part, impedes its further development, while morphology melt pool, influenced and determined by process parameters, poses crucial influence on overall part geometry. Nonetheless, association between parameters pool still unclear. Hence, indispensable explore relevant solution address this issue. For purpose, paper proposes new model directly establish mathematical relationship structure for process. In model, status first qualitatively analyzed via defined synthetic index, three types states are differentiated including low melting, intermediate high could cover different modes. Then, computational involving more physical mechanisms integrating mass conversion, heat exchange, temperature field constructed. Melt critical geometries height, width, depth, length be computed through model. order validate correctness proposed published experimental observations existing models compared. Calculation results from show consistency with samples better accuracy than empirical models. Its applicability classification prediction also verified, laying foundation geometric simulation object successively shaped melt-pool melt-pool.