Simulation of the Kinetics of Dynamic Recrystallization of Alloy KhN55MBYu-VD During Hot Deformation

A facility for physical simulation is used to plot dependences of flow stress on the degree of deformation in the temperature range from 1000 to 1230°C at deformation rates from 0.1 sec–1 to 50 sec–1 for alloy KhN55MBYu-VD. The dependences obtained and the results of the determination of grain sizes are used to calculate the coefficients for models of the kinetics of dynamic recrystallization based on a Johnson–Mehl–Avrami–Kolmogorov-type equation and of growth of dynamically recrystallized grains. The simulation of the grain size variation during dynamic recrystallization has shown that the deviation of the computed data from the experimental ones does not exceed 15%.