The effect of cyclic loading on the creep fatigue life and creep strength of a DS superalloy: Damage mechanism and life modeling

In this paper, the creep-fatigue behavior of directionally solidified superalloy DZ125 has been investigated by stress-controlled experiments at high temperatures with different dwell times. The endurance life(i.e Cumulated dwell time) has shown consistent changing trend with different load conditions. Crack growth form and creep-fatigue interaction are analyzed on the basis of microscope observation results. A new continuum damage...