3D Printed CoCrFeMnNi High-entropy Alloy: Microstructure and Mechanical Properties at Room and Cryogenic Temperatures 3D打印CoCrFeMnNi高熵合金的微观组织, 室温及低温力学性能

High-entropy alloys (HEAs) have been considered as a new class of metallic alloys famous for their unique microstructures, comprehensive performances and wide applications. In this study, selective laser melting technology has been utilized to fabricate CoCrFeMnNi HEA. Phases, microstructure and mechanical properties of the as-built specimens at both room and cryogenic temperatures were investigated. The optimized printing parameters and the high relative density alloy with excellent tensile properties were derived. The tensile strength was 647 MPa at room temperature and 893.8 MPa at cryogenic temperature, respectively, demonstrating good combination of strength and ductility at cryogenic temperature.