测定了[001]取向单晶镍基合金的蠕变曲线，并利用SEM和TEM对蠕变后期的微观组织结构进行了观察结果表明：蠕变第三阶段结构特征是大量位错切入筏状γ’相．降低了台金的蠕变抗力两个滑移系统交割产生滑移台阶，连续的交替滑移使筏状γ’相发生扭曲、并产生微裂纹是蠕变断裂的直接原因 The creep curves of [001] oriented single crystal nickel-based alloys were measured and the microstructures of late stage of creep were observed by SEM and TEM. The results show that the structural features of the third phase of creep are a large number of dislocations cut into the raft γ ’phase. Reducing the creep resistance of Taijin Two slip systems produce slip steps during the delivery process. Continuous alternating slippage distorts the raft γ ’phase and generates micro-cracks as the direct cause of creep rupture