A body-centered cubic Zr50Ti35Nb15 medium-entropy alloy with unique properties

Abstract

The center of phase diagram, relatively high-disordered region, often has few alloy systems available, especially for traditional ternary alloy systems. Here, we develop a novel Zr50Ti35Nb15 alloy near the center of phase diagram, as a body-centered cubic (bcc) solid solution phase, which displays a unique combination of Young's modulus of 62 GPa, yield strength of 657 MPa, tensile ductility of 21.9%, and excellent corrosion resistance (Ecorr=422 mV, Ipit=0.336 µA/cm2). The excellent mechanical properties of this alloy are related to dislocation slip and deformation twins. This result also proves that the disordered structure is valuable for traditional alloy systems.