Steady-State Creep Behaviors and Corresponding Microstructures of New Nickel-Base Single Crystal Superalloy at Tempeoatures above 980 ℃

The relationships between steady-state creep behavior and corresponding microstructure characterization of a new nickel-base single crystal superalloy under high temperature (＞980 ℃)creep conditions were studied. The results show that rafting microstructure was the main characterization of steady-state creep stage; shorter primary creep stage and higher dislocation network density were of benefit to the steady-state creep deformation.