A physically-based constitutive model for hot deformation of Ti-10-2-3 alloy

Hot compression tests of Ti-10-2-3 alloy were carried out in the temperature range of 900-1050 °C, at strain rates of 0.001-1 s−1 on a Gleeble thermo mechanical-simulator. The experimental results demonstrate that the flow stress of the titanium alloy is significantly influenced by temperature, strain and strain rate. A physically-based constitutive model was established, based on the dislocation density theory and dynamic recrystallization kinetics. The comparison between the experimental and predicted flow stresses shows that the established model has high accuracy. The statistical study confirmed the predicting capability of the model. The presented constitutive model, as well as the dynamic recrystallization (DRX) kinetics, was incorporated into ABAQUS to provide an effective means to study hot deformation. Results confirm that the constitutive model considering dynamic recovery (DRV) and DRX provides high accuracy. DRX results of the Finite Element Method (FEM) are in good agreement with the experimental results.