Deformation and microstructural evolution in alloy FGH96 under isothermal forging conditions

Dynamic recrystallization phenomenon of FGH96 P/M superalloy under isothermal forging conditions was studied. Curves of work hardening rate θ versus flow stress σ and RTT curve of dynamic recrystallization were gained through the analysis. At the same time, some parameters were confirmed including peak strain, critical strain and the maximal softening strain. On the basis of the analysis, the type of FGH96 P/M superalloy dynamic recrystallization was exactly ascertained. The quantitative metallography method was adopted to determine the recrystallized grain size. With combining the obtained data and parameters, FGH96 P/M superalloy dynamic recrystallization mathematic model was established by regression method.