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The hot deformation behavior of FGH96 superalloys at 1070-1170°C and 5×10?4-2×10?1 s?1 were investigated by means of the isothermal compression tests at a Gleeble-1500 thermal mechanical simulator. The results show that dynamic recovery acts as the main softening mechanism below 2×10?3 s?1, whereas dynamic recrystallization acts as the main softening mechanism above 2×10?3 s?1 during deformation; the temperature increase caused by the deformation and the corresponding softening stress is negligible; the thermal-mechanical constitutive model to describe the hot deformation behavior is given, and the value of the apparent deformation activation energy (Qdef ) is determined to be 354.93 kJ/mol.
The hot deformation behavior of FGH96 superalloys at 1070-1170 ° C and 5 × 10 -4-2 × 10 -1 s -1 were investigated by means of the isothermal compression tests at a Gleeble-1500 thermal mechanical simulator. The results show that dynamic recovery acts as the main softening mechanism below 2 × 10 -3 s -1, while dynamic recrystallization acts as the main softening mechanism above 2 × 10 -3 s -1 during deformation; the temperature increase caused by the deformation and the corresponding softening stress is negligible; the thermal-mechanical constitutive model to describe the hot deformation behavior is given, and the value of the apparent deformation activation energy (Qdef) is determined to be 354.93 kJ / mol.