Abstract

In this study, we introduce a novel single-phase Ti1·6ZrNbMo0.35 refractory high-entropy alloy (RHEA), synthesized through vacuum arc-melting. The as-cast RHEA demonstrates excellent mechanical properties with a high yield strength of ∼930 MPa and a large tensile strain of ∼15.4 %, achieved through severe lattice distortion. Moreover, our investigation reveals the superior corrosion resistance of the RHEA in 3.5 wt% NaCl solution. The remarkable anti-corrosion properties are attributed to the single-phase structure, the increase of Mo6+ oxides in the passive film and continuous passive oxidation of the elements. This work provides a new and significant approach to designing novel RHEAs with excellent combinations of strength-ductility synergy and superior corrosion resistance.