The influence of selective laser melting (SLM) parameters on physical, and mechanical properties of AlSi10Mg cylindrical specimen

AlSi10Mg cylindrical specimens were fabricated using the Laser-based Powder Bed Fusion (L-PBF) process, focusing on optimizing scanning speed, hatch spacing, and layer height through the box-behnken design (BBD). The study aimed to minimize surface roughness and maximize relative density. The analysis involved ANOVA, regression analysis, and composite desirability, revealing that hatch spacing and layer height significantly influence relative density and surface roughness. Under optimized conditions (scanning speed: 500 mm/s, hatch spacing: 100 microns, layer height: 30 microns), the L-PBF specimen achieved a 96.70% relative density, 2.07 microns surface roughness (Ra), and an average microhardness of 124.9 HV 0.5 (longitudinal) and 120.5 HV 0.5 (transverse).