Optimization of the Additive Manufacturing of Co-Cr Alloy by using DED Process

Abstract

In this study, the directed energy deposition (DED) process was applied to additively manufacture cobalt-chromium alloy materials, which are commonly used in molds, dental/orthopedic medical applications, vehicles, and aircraft. The quality of the deposition obtained by using the DED technology is affected by process parameters. Therefore, the aim of this experiment, was to evaluate the microstructure changes caused by varying parameters such as the laser power, laser header moving speed, and powder feeding rate, with the goal of improving and optimizing the stacking quality. The shape, heat-affected zone, and dilution ratio of the microstructure were analyzed using an optical microscope. Furthermore, the global energy density(GED) was calculated because it affects the quality of the 3D-printed product. The optimal process conditions for the DED method determined by calculating the GED under various process conditions.