Journal Article

Thermal Stability and Mechanical Properties of Low-Activation Single-Phase Ti-V-Ta Medium Entropy Alloys

Liu, Xuan, Jin, Ke, Zheng, Yi, Wang, Junsheng, Xue, Yunfei, Wang, Benpeng, Jia, Nannan, Li, Yunkai

2019

Overview

A series of titanium-vanadium-tantalum (Ti-V-Ta) medium entropy alloys have been fabricated with all of them exhibiting a single-phase body-centered cubic structure in the homogenized states, and their thermal stability as well as their mechanical properties have been investigated. Among the four studied alloys, Ti 27 V 33 Ta 40 , Ti 33 V 33 Ta 34 , Ti 40 V 33 Ta 27 , and Ti 45 V 20 Ta 35 , the equi-atomic Ti 33 V 33 Ta 34 has shown the highest thermal stability, without secondary phases formed after annealed at 400–700°C for 48 h, while decompositions have been observed in the other three alloys. All the four alloys have exhibited a good compression strength of 394–527 MPa at 800°C, while, except Ti 27 V 33 Ta 40 , maintaining an acceptable tensile ductility with fracture strains of 7.6–13% at room temperature. Furthermore, the low neutron activity of the Ti-V-Ta alloys grant them application potentials in nuclear engineering.

• Publisher: Springer US,Springer Nature B.V
• Subject: Alloys / Annealing / Chemistry/Food Science / Compressive strength / Ductility / Earth Sciences / Engineering / Entropy / Entropy of activation / Environment / Mechanical properties / Medium entropy alloys / Neutrons / Nuclear engineering / Physics / Progress in High-Entropy Alloys / Radiation / Room temperature / Solid solutions / Tantalum / Temperature / Thermal stability / Titanium base alloys / Vanadium