Hot Workability and Microstructure Control of Ti6Al4V Alloy

Titanium alloy Ti6Al4V has been recognized for its high strength-to-weight ratio. Extensive deformation study has been conducted; however, defects like strain-induced porosities, non-uniform microstructure, etc., are observed during thermomechanical processing. So, optimization of thermomechanical processing parameters is highly essential to avoid the recurrence of these kinds of defects. Characterization of defects noticed in hot-rolled ring sample was carried out and a detailed deformation study has been conducted to understand the generation of such defects to avoid their occurrence. The study has been conducted in the temperature range of 800-1050 °C and strain rate of 0.001 to 10 s−1 using a Gleeble 3800 thermomechanical simulator. Microstructural mapping of the deformed Ti6Al4V is carried out. Workability by hot deformation is explained through processing maps. As per the efficiency of power dissipation maps, the maximum efficiency of 65-70