Influence of Scanning Velocity on a CoCrMoW Alloy Built via Selective Laser Melting: Microstructure, Mechanical, and Tribological Properties

In this study, CoCrMoW samples were produced by selective laser melting (SLM). The influence of scanning velocity on the microstructure, mechanical, and wear properties of the fabricated samples was investigated. Experimental outcomes indicated the samples produced with higher scan velocity showed higher microhardness as well as higher tensile strength values due to refined grains. Also, these values increased with increasing scan velocity. The influence of scan velocity on the wear performance of the CoCrMoW alloys was observed. Although the COF values of the samples increased with the increment in scanning velocity, their wear rate decreased. The excellent wear resistance of the samples fabricated with laser scanning velocity of 1000 mm/s could be related to their high microhardness. Furthermore, this work may help in the further advancement of CoCrMoW alloys.