Abstract
AbstractSelective laser melting is a powder-based fusion process in which a moving laser head builds metal parts from a 3D model using a high thermal gradient. The rapid heating and cooling cycles develop complicated residual stresses which are detrimental to the mechanical strength of the part. Numerical simulations serve as an effective tool for predicting the favorable temperature and stress fields rather than going for cost-expensive experimental measurements. A finite element model is developed considering the phase change, temperature-dependent thermal properties, and taking account of all the heat transfer losses to obtain the temperature field accurately. The results show the influence of the liquid thermal conductivity on the temperature field and also validates the rapid thermal cycles involved during the SLM process.KeywordsSelective laser meltingThermal gradientTemperature field
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