Hot Compression Deformation Behaviors and Microstructure Evolution of GH4169 Alloy

The hot deformation behavior of GH4169 alloy were investigated by single-pass isothermal compression tests with Gleeble-3500 D simulated machine. The investigated variable included the deformation temperature ranging from 900 ℃ to 1 150 ℃,strain rate ranging from 0.01 s^-1 to 10 s^-1 and the deformation degree ranging from 10 % to 70 %.By the resulted flow stress curve and microscopic observation,the influence of thermodynamic parameters on the flow stress,peak stress and dynamic recrystallization of GH4169 alloy was analyzed,and the constitutive relation model of GH4169 alloy was established.