Simulation and Experimental Study of Recrystallization Kinetics of Nickel Based Single Crystal Superalloys

Hot compression tests on cylinders using nickel-based single crystal superalloy DD6 were conducted to introduce the stored energy for recrystallization. Annealing was carried out at different temperatures for different time to investigate the kinetics of recrystallization of DD6. The experimental results show that the recrystallization rate increases gradually with temperature. The stress, strain and stored energy distribution of single crystal superalloy were modeled based one macroscopic phenomenon-based elastic-plastic model, considering the orthotropic properties of SX superalloys. Recrystallization microstructure on the cross-section perpendicular to the cylinder axis was simulated using cellular automaton (CA) method. The model can predict experimental results.