Hot deformation characteristics and forging process of corrosion resistant nickel-base C-276 alloy

The flow stress behaviors and microstructure characteristics of C-276 alloy were investigated by isothermal compression tests in the temperature range of 1100-1250 °C and strain rate range of 0.1-10 s-1 on Gleeble 1500 thermo-simulation machine to determine forging process range. The strain hardening exponent and deformation activation energy were evaluated by linear regression analysis, and the flow stress constitutive relationship of C-276 alloy during hot compression was established. The results showed that dynamic recrystallization occurred in evidence during hot compression of C-276 alloy in the present experiment condition. The flow stress can be represented by a Zenner-Hollomon parameter in the hyperbolic sine type equation. The suitable processing temperature range for C-276 alloy is 1175∼1250 °C, and strain rate range from 0.1s-1 to 10s-1.

Post time: Mar-22-2017


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