MICROSTRUCTURE AND PROPERTIES OF BIOMEDICAL STEEL 316L, FABRICATED BY LPBF-PRINTING

Abstract

The article describes the comparative study of microstructure, phase state, physical and mechanical properties of biomedical steel 316L, fabricated by 3D printing using additive technology of Laser Based-Powder Bed Fusion. It is established that 3D-printed steel has an austenitic structure of heterogeneous structure, the features of which depend on the plane of analysis relative to the direction of printing. Due to the non-equilibrium dispersed structure and more significant distortions of the crystal lattice, LPBF-printed 316L steel samples have almost a twofold advantage in hardness over sheet samples at approximately the same level of modulus of elasticity.