Effect of heat treatments on microstructure and mechanical properties of AlSi10Mg alloys fabricated by laser powder bed fusion

This study investigated the microstructures and tensile properties of as-build heat-treated (including T6, T2, T6-T2 treatments) AlSi10Mg samples fabricated by laser powder bed fusion (LPBF). The microstructure analysis revealed that trend eutectic Al-Si phase distribution along grain boundaries for was significantly weakened, transformed into Si particles which were uniformly distributed in α-Al matrix. For T6-T2-treated specimens, content highest. Meanwhile, T6 treatment increased proportion equiaxed grains on vertical section most significantly. However, wake heat treatments, average size horizontal had little change while increased. demonstrated specimens obtained best elongation worst strength. Besides, eliminated anisotropy LPBFed basically synergistically combination strength plasticity. weakened direction difference to greatest extent, whereas T2 minimized stress concentration. According comparative finding, played an important part properties. relationship among inverse pole figure (IPF) maps, (PF) mass fraction Al matrix particle, size, kernel misorientation (KAM), mechanical under different treatments established, provided a new idea selection parts.