Effect of Powder Composition Characteristic Temperatures And Input Energy Density on Microstructure and Internal Stresses of Nickel- and Cobalt-Based Heat-Resistant Alloys Produced by Selective Laser Melting. Part 2

Abstract

Selective laser melting (SLM) of heat-resistant nickel alloy VZh159 is used to show that at constant energy density the key factor determining the texture and the internal stresses is the hatching distance. At multiple increase in the exposure rate and decrease in the hatching distance, the micropore proportion increases exponentially due to enhancement of the dissipation of the laser radiation caused by reflection in the track overlapping zone.