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通过对叶片失效件进行断口观察、分析发现,叶片故障是由于叶片表面发生腐蚀导致疲劳强度降低,使得叶片在振动应力下发生疲劳失效,叶片腐蚀主要是由于发动机的使用环境造成的。
Through the fracture observation on the failed blade, it is found that the failure of the blade is caused by the corrosion on the blade surface leading to the decrease of the fatigue strength, resulting in fatigue failure of the blade under the vibration stress. The blade corrosion is mainly caused by the use environment of the engine.