Numerical Investigation of Thermo-Mechanical Field during Selective Laser Melting Process with Experimental Validation

In this study, thermo-mechanical simulation was conducted to predict thermal and stress behavior in Selective Laser Melting (SLM). Temperature-dependent material properties for processed 304L stainless steel were incorporated into the model order capture change from powder fully dense solid steel. Temperature history tracked under conditions of different parameter sets which designed reduce defect formation. The predicted temperature multi-track scans process parameters, such as laser power, effective scanning speed hatch spacing. Subsequently, corresponding melt-pool size, solidification rate gradients could be calculated simulated data. These three parameters compared with experimental melt pool grain structure cell spacing data obtained a Renishaw AM250. also used determine unknown required by continuum model, e.g., optical penetration depth conductivity multiplier molten region. This allowed accurately size SLM Simulated showed that subsequent cyclic melting successive scanned tracks resulted alternating compressive tensile stresses. work will provide insight studying microstructure morphology, residual deformations