Fatigue behaviour analysis of AISI 316-L parts obtained by machining process and additive manufacturing

Abstract Due to the great technological growth, 3D printing is becoming of relevance within automotive, aerospace and even medicine sectors. With this manufacturing method, parts with a complex geometry can be manufacture considerable time material savings compared traditional processes such as machining. However, additive still have series unresolved problems. Present work makes comparison between AISI 316-L samples obtained by Selective Laser Melting technique Dry Machining. The focus in properties mainly relevant industrial sectors highlighted. Macro microgeometrical deviations, roughness, roundness straightness are each case study compared. Results show that, although for printed deposition direction plays fundamental role, being horizontal ones better results due layers, machining process one significant process. After macro deviations measurements, all were subjected rotational bending fatigue test mechanical behaviour study. As expected, mechanized specimens surface finish, among other aspects. Between manufactured specimens, vertical that presents transverse orientation deposited layers.