Effect of Laser Energy Density on the Microstructure and Microhardness of Inconel 718 Alloy Fabricated by Selective Laser Melting

This work focused on the effects of laser energy density relative density, microstructure, and microhardness Inconel 718 alloy manufactured by selective melting (SLM). The microstructural architectures, element segregation behavior in interdendritic region evolution laves phases as-SLMed IN718 samples were analyzed optical metallography (OM), scanning electron microscopy (SEM), dispersive spectrometer (EDS), probe microanalysis (EPMA). results show that with an increase volume firstly increased then decreased slightly. It also facilitates precipitation Laves phase. variation mechanical properties can be related to densification degree, microstructure uniformity, phase content alloy.