Fig. 13

The effect of time (a) and temperature (b) for annealing of twins assuming n = 2 and 3 for decreasing rate expressed by an empirical n-th order recrystallization kinetics expression, dρ/dt = −kρⁿ, where k is the rate constant for recrystallization (see the text for more details). a Decrease in twin density by annealing during time intervals from one minute to one hour at 1070 K and various depths of the sample for n = 2 (blue curves) and for n = 3 (red dotted curves). The experimental data for Run 011 and Run 011H (10-min annealing at 1070 K) are shown as black open and red open circles, respectively. b The change in twin density by annealing at various temperatures and durations from one minute to one hour for n = 2 (blue curves) and n = 3 (red curves). The initial twin density before annealing was taken as 3.5 × 10⁵ cm⁻², and the activation energy E_a of 250 kJ/mol was adopted for the recrystallization process of twins