Constitutive equations and kinetic analysis of novel Ti52Nb19Zr15Mo14Al biomaterial: predicting deformation mechanisms and processing map for orthopaedic applications

Evaluating and understanding the high-temperature flow behaviour of thermomechanical processing conditions for Ti alloys is essential to meeting the current demand for lightweight, high-strength structural materials. Considerable work has been conducted on the correlation among heat treatments, microstructure, and properties of Ti52Nb19Zr15Mo14 and Ti6321 alloys. Workability was evaluated for various heat treatment conditions that allow α to precipitate. A high-temperature hot deformation test was conducted at temperatures ranging from 700°C to 1000°C and with a strain rate of 0.01 to 10 s−1 (at constant strain of 0.3), to investigate the hot flow behaviour of Ti alloys. The Ti52Nb19Zr15Mo14 alloy exhibits higher tensile strength and hardness than the Ti6321 alloy, with values of 912 MPa and 396 MPa, respectively. The high peak efficiency of power dissipation from the processing map occurred (η = 56%) at 910°C for the Ti52Nb19Zr15Mo14 alloy.