finite element analysis of phase distribution in forging of the two-phase ti-6al-4v alloy to have a hip joint implant

In this research, the finite element analysis (fea) of the effect of forging parameters including temperature, strain rate and cooling rate on the percentage of α and β phases in forging of the two-phase ti-6al-4v alloy to fabricate a hip joint implant was investigated. in order to be used in fea, the stress-strain curves of ti-6al-4v at temperatures ranged between 800 to 1000°c and, strain rates of 0.01, 0.1, 1 s^-1 up to a total strain of 0.45 by using hot compression test were obtained. the force-displacement curve of hot compression test of a cylindrical sample made of ti-6al-4v alloy from fea and experiment in similar condition was used for verification. results showed that all three input variables have an effect on the volume percentage of final α and β phases. by increasing the cooling rate, forging temperature and strain rate, the percentage of the final α phase decreases and the amount of the β phase increases. additionally, in all cooling rates, the amount of the final α phase decreases from the center to the sides of samples.