Phase Stability and Aging Strengthening of Ti2ZrNbV High Entropy Alloy

Abstract:

A bcc-structured Ti₂ZrNbV (at%) high entropy alloy was prepared by vacuum arc melting. The stability of the solid solution phase was studied, and the improvement of tensile property via V₂Zr phase precipitation was investigated. The results show that the homogenous solid solution phase is stable above 900 °C, and Laves phase V₂Zr easily precipitates below this temperature. The instability of the solid solution phase can be used for enhancing the Ti₂ZrNbV alloy. After solid solution and aging treatment, the tensile yield strength of the alloy can reach 1145 MPa with a promising elongation of 8.3%.