Phase Composition of Austenitic Stainless Steels in Additive Manufacturing: A Review

Additive manufacturing (AM) is among the novel industrial technologies for fast prototyping of complex parts made from different constructional and functional materials. This review focused on phase composition additively manufactured chromium-nickel austenitic stainless steels. Being produced by conventional methods, they typically have single-phase structure, but steels could vary in AM. Comprehensive analysis recent studies shows that, depending AM technique, chemical composition, process parameters, be characterized both multiphase structures (austenite, ferrite, ?-phase, segregations alloying elements). Presence ferrite other phases strongly influences their properties, particular, increase strength characteristics decrease ductility corrosion resistance Data give a state-of-art mutual connection method, raw material, resultant AM-fabricated Cr-Ni 300-series. The possible directions future investigations are discussed as well.