Residual Stress Formation in Laser-Based Powder Bed Fusion (PBF-LB) of Invar 36

Laser-based powder bed fusion (PBF-LB), also known as selective laser melting (SLM), is a metal additive manufacturing process associated with residual stress formation due to rapid heating and cooling. This paper aims at investigating residual stresses and deflections of Invar 36 parts produced using a selective laser melting machine that is equipped with a 400-W ytterbium fiber laser source. Invar 36 has been used in the aerospace industry …