Microstructure Evolution and Prediction of Alloy 617 During Hot Deformation Based on Dynamic Recrystallization

The hot compressive experiments of nickel-based alloy 617 were carried out at the different deformation conditions on a Gleeble-3500 thermal-simulator. The rule of the process parameters on the dynamic recrystallization microstructure evolution of alloy 617 under different deformation conditions were analyzed. Microstructure evolution models of dynamic recrystallization were constructed based on computational analyzed on the experiment data including strain-stress curves and metallographic photos. The models were implanted into finite element software Deform-3D in order to predict microstructure evolution during hot forging. The results show that the simulated results are in good agreement with the actual results, prediction control on the microstructure of alloy 617 during hot forging is achieved and the accuracy of models is verified.