Journal
OPTICS AND LASER TECHNOLOGY
Volume 142, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2021.107136
Keywords
316L stainless steel; Selective laser melting; Flow behavior; Surface active element; Finite volume method
Categories
Funding
- National Natural Science Foundation of China [U1860106]
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Selective Laser Melting (SLM) is an important additive manufacturing method with complex processes involving heat transport, liquid metal flow, and solidification behavior. This study successfully simulated the SLM process using the finite volume method, confirming the time for the molten pool to reach a stable state.
Selective Laser melting (SLM) is one of the important additive manufacturing (AM) methods, the process of which is very complex, involving multiple physical field coupling. In this paper, the finite volume method is used to simulate the SLM process, and the heat transport, liquid metal flow and solidification behavior in the molten pool are studied. The model has taken into account the latent heat of phase transition, Marangoni effect and surface-active elements. The time when the molten pool reaches a stable state is confirmed by the temperature of a probe point and the shape change of the main molten pool. Based on a successful SLM process parameter combination, the better process parameters are pursued according to the simulation results. The effect of the surface-active element sulfur on the shape of molten pool is explained from the perspective of the influence on the surface tension.
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