Fatigue behavior of additively manufactured 17-4 PH stainless steel: Synergistic effects of surface roughness and heat treatment

In this study, the synergistic effects of heat treatment and surface roughness on the microstructure and mechanical properties of laser powder bed fusion (L-PBF) 17-4 precipitation hardening (PH) stainless steel (SS) were investigated under monotonic tensile and fatigue loading. Five different heat treatment procedures, with and without primary solution treating cycle, i.e. Condition A (CA), were applied on L-PBF specimens in both as-built and...