Effect of Rolling Temperature on the Evolution of Texture and Microstructure of Ti-6al-4v

Abstract

The main objective of the present study was to investigate the effect of rolling temperature on evolution of texture and microstructure of the Ti-6Al-4V alloy. Ti-6Al-4V plates of initial thickness 4 mm were subjected to rolling at 600oC and 800oC for 50 %, 70 % and 90 % reduction in thickness respectively. Various reduction percentages of the samples were obtained at a true strain value of 30 % during each passes of rolling. From the bulk texture measurements it was observed that when the temperature of rolling was increased from 600oC to 800oC the samples tends to show strong basal texture component. However, it was significant for the samples deformed up to 90 % reduction in thickness. From EBSD analyses of the samples, it was observed that the average grain size and average grain orientation spread (GOS) was decreased as a function of deformation for the samples rolled at two different temperatures. It was further observed that the deformation mode in both the conditions of rolling was through prismatic, pyramidal, 1st order pyramidal and 2nd order pyramidal slip.