Modeling the hot-deformation behavior of Ni60 wt%–Ti40 wt% intermetallic alloy

A model was developed to predict the hot deformation behavior of Ni60 wt%–Ti40 wt% alloy. In these regard, the hot compression tests were carried out at the temperatures from 950 °C to 1050 °C and at the strain rates of 0.001 s−1 to 0.35 s−1. The experimental data were then used to determine the constants of developed constitutive equations. The developed model can be represented by Zener–Hollomon parameter in a hyperbolic sinusoidal equation form. The predicted stress–strain curves are in a very good agreement with those obtained experimentally, both illustrating the occurrence of dynamic recrystallization. Also, in both cases, the peak and steady-state stresses raised with decreasing temperature and increasing strain rate. The very good agreement between the measured and predicted results indicates the high accuracy of developed model and established constitutive equations in predicting and analyzing the hot deformation behavior of Ni60 wt%–Ti40 wt%.