Designing TiVNbTaSi refractory high-entropy alloys with ambient tensile ductility

Adding oxidation-resistant elements (e. g. Al, Cr, Si) to refractory high-entropy alloys (RHEAs) improves their high-temperature oxidation resistance while commonly degrades the room-temperature ductility, which greatly challenges the further applications of RHEAs. To tackle this trade-off, here in this study, we first identified the tensile-ductile TiVNbTa, alloyed it with Si, and then ductilized the initially brittle TiVNbTaSi0.1 via a simple...