This study focuses on the processability of four low-alloy steels (AISI 4130, 4140, 4340 and 8620) via laser-based powder bed fusion (LB-PBF). In as-built condition, alloys consisted tempered martensite that was result an intrinsic heat treatment (IHT) during LB-PBF. terms defects, a distinct transition in porosity observed correlated to volumetric energy density (VED). At low VED, specimens co...
