Dynamic recrystallization model of GH696 superalloy

The deformation behavior of GH696 superalloy was studied by isothermal compression experiments the deformation temperatures ranging from 880 to 1120℃, strain rates ranging from 0.01 to 10.0 s^-1 and deformation degree ranging from 30% to 60%. The microstructure of GH696 superalloy after compression was observed on a microscope. The results show that dynamic recrystallization of GH696 superalloy occurs more easily at higher deformation temperature and lower strain rate. The critical strain of dynamic recrystallization of this alloy is identified based on the work hardening rate versus flow stress curves. The kinetics of dynamic recrystallization of GH696 superalloy is established based on Avrami equation. A model for DRX grain size is established based on OM experimental measurement results of GH696 superalloy.