Fracture Analysis of Compressor Rotor Blade in Engine

A second-grade compressor rotor blade in an aero-engine fractured after serving for a while. In order to find out the fracture mode and cause, macro and micro observation, EDS analysis and surface quality examination were carried out. The results show that the fracture mode of the blade is high-cycle fatigue fracture. There are heavier polishing marks at the surface of blade and the tip of the blade was hitted by other things. The above factors caused the cracking of the blade. The surface quality of the blades should be improved to prevent such a failure.