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某二级涡轮盘榫齿在外场使用中断裂失效严重，连续发生数起二级涡轮盘甩出及叶片脱榫飞出事故．断口分析表明属疲劳和腐蚀交互作用所致，为确保发动机在外场使用的安全，对这种轮盘榫齿在高温状态下，分轻、重腐蚀２种类型进行了高、低周复合疲劳寿命对比试验研究．试验较成功地模拟了实际使用中造成榫齿损坏的主要因素，试验断口表现出明显的疲劳破坏特征，实现了盘齿故障再现，其试验成果为该发动机安全飞行提供了科学依据．
A second-stage turbine disk tenon teeth in the field in the use of fracture failure, the number of consecutive occurrence of two turbine disc thrusters and blade tenon fly accident. Fracture analysis showed that fatigue and corrosion caused by the interaction, in order to ensure the safety of the engine in the outfield use of this type of roulette tenon teeth in high temperature, light and heavy corrosion of two types of high and low cycle composite fatigue life Comparative experimental study. The test has successfully simulated the main factors that caused the damage of tenon gear during actual use. The test fracture showed obvious fatigue failure characteristics, which realized the reappearance of the disk tooth fault. The test results provided a scientific basis for the safe flight of the engine.