Microstructural characterisation and modelling of a Ti-6Al-4V alloy during thermomechanical processing in the β phase field

The microstructural evolution of a Ti-6Al-4V alloy during thermomechanical processing in the beta phase field was investigated both experimentally and via modelling. The influence of strain rate and temperature on the microstructural evolution seas considered. The experimental results show that dynamic and/or metadynamic recrystallisation occurred when processed in the,8 phase field. The simulation results show that both the percentage of DRX and the mean size of the DRXed grains increase with increasing temperature and decreasing strain rate. The predicted mean dislocation density fluctuates at lower strain rates or high temperatures, and gradually stabilises With increasing strain rate or decreasing temperatures.