Effect of residual stress on fatigue strength of 316L stainless steel produced by laser powder bed fusion process

316L stainless steel fatigue samples produced by laser powder bed fusion (L-PBF) process were stress relieved at 900 °C for 2 h to understand the effect of residual stress on fatigue strength. Two groups of fatigue samples were produced: “polished” and “machined and polished”. “Polished” samples were built to final fatigue sample geometry and then polished to avoid surface roughness effect while preserving the residual stress at the surface. The...