Flow behavior modeling of IMI834 titanium alloy during hot tensile deformation
(Metallic Materials Research Center, Maleke Ashtar University of Technology, Tehran 009821, Iran)
Abstract: A proper constitutive model was developed to predict the hot tensile flow behavior of IMI834 titanium alloy in α+β region. Hot tensile tests were performed at 800-1025 °C and 0.001-0.1 s-1. The constitutive model was developed through an Arrhenius-type equation at strains of 0.08-0.22 to characterize the hot tension behavior. It was found that the activation energies for hot tensile deformation of IMI834 titanium alloy are in the range of 519-557 kJ/mol at different strain values. The accuracy of predicted flow stress curves was evaluated using standard statistical parameters. These curves are appropriately found to be in good agreement with the experimental ones.
Key words: titanium alloy; flow behavior; hot tensile deformation; constitutive model