| Abstract Scope |
High entropy alloys (HEAs) are notable for their excellent mechanical strength, good ductility, oxidation resistance, and thermal stability under extreme conditions. In this study, we developed an ultrastrong single-phase HEA composed of six elements with high specific strength and reasonable ductility. We designed an algorithm to calculate thermodynamic properties and predict single-phase crystal structures. The alloy combinations, selected from Al, Ti, Sc, V, Cr, Fe, Co, Ni, Cu, Nb, and Mo, were produced and homogenized by vacuum arc melting. X-ray diffractometry confirmed an ordered BCC (B2) crystal structure without intermetallic compounds. The ideal heat-treatment conditions were determined using in-situ XRD analyses. Porosity, microstructure, and composition homogeneity were analyzed using micro-CT, SEM, EDS, and EBSD, while TEM provided detailed microstructural insights. Mechanical testing revealed a microhardness of 630 HV and ultimate compressive stress exceeding 2500 MPa. The impact of heat treatment on microstructure and mechanical properties will be discussed. |