Creep Behaviors of Nickel-Base Superalloys Alloy 617 and Haynes 230 at High Temperature

摘要

Creep behaviors of nickel-base superalloys, Alloy 617 and Haynes 230 were studied at high temperature. In order to investigate the effects of temperature, environment and strain rate on the hot deformation behaviors, tensile test was carried out in the temperature range of 800 deg C to 1000 deg C with strain rates of 10~(-1) to 10~(-3) s~(-1). Evolution characteristics of high temperature dynamic recrystallization were studied by means of the microstructure observation including change in grain size and grain boundary serration.