Abstract Scope |
In this study, high entropy alloy (HEA) composed of five elements (Al, Co, Cr, Fe, Ni) with different proportions was manufactured by laser directed energy deposition. The microstructure, mechanical properties, and oxidation resistance of those printed HEA parts were investigated. Firstly, ten different elemental compositions were selected by machine learning based on the simulated oxidation resistance performance. Then pure element powers were mixed by ball milling according to the chosen proportions. After optimizing the printing parameters, block samples were fabricated and then characterized by optical microscopy, scanning electron microscopy, X-Ray diffraction analysis, hardness testing, and oxidation resistance evaluation. The experimental oxidation results are consistent with the simulation and the superior oxidation resistance performance of additive manufactured HEA is comparable to the existing commercial materials. |