EFFECT OF MESOSTRUCTURAL STRENGTHENING OF 316L STEEL IN THE SELECTIVE LASER MELTING PROCESS
Results of our research are presented on the influence of selective laser melting (SLM) regimes on the physico-mechanical properties and structure of 316L stainless steel. The effect of annealing temperature and deformation temperature on micro- and mesostructure and the fracture behavior of 316L SLM alloy is investigated. The dependences of ultimate tensile strength and elongation to failure on the deformation and annealing temperatures are obtained. The effect of alloy mesostructural strengthening manifested in increasing ultimate tensile strength up to 660 MPa under deformation at room temperature is discovered. The discovered effect is assumed to be connected with the special properties of the alloy internal interfaces, the micro-welded joint boundaries.