(a) (b)
Figure 3: Double differential minima curves at deformation temperature of 1200 °C and 1150 °C and strain rates of 0.25 s-1 and 0.5 s-1 for (a) first hit and (b) second hit deformation. Figure 3: Double differential minima curves at deformation temperature of 1200 °C and 1150 °C and strain rates of 0.25 s-1 and 0.5 s-1 for (a) first hit and (b) second hit deformation.