Creep fatigue crack propagation rate experiments were conducted at 600℃,with different loads and holding times applied.The effects of force values and holding times on creep fatigue crack propagation rate were studied,and the crack propagation path was observed through metallographic testing.The results showed that under low stress conditions,the creep fatigue crack propagation rate increased with the reduction of holding time;Under high stress conditions,the creep fatigue crack propagation rate decreased with increasing holding time;Compared to cracks containing fatigue components,the propagation path of creep cracks appeared smoother.
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