Surface quality improvement of a laser-polished Co-free high entropy alloy prepared by selective laser melting

Abstract

In order to improve the quality of the Co-free high entropy alloy surface, a Co-free high entropy alloy specimen prepared by selective laser melting was polished by laser in this work. Optimal laser polishing process parameters were explored, and the best surface roughness Sa value reached 0.4626µm, which is much lower than the original surface roughness. Through microscope, SEM, EDS and other tests, the surface quality after polishing is obviously improved The big improvement in high entropy alloy specimen’ surface quality has potential significance in promoting the application of this material in high precision situations.