FRACTURE ANALYSIS OF TRANSMISSION SHAFT OF CHARGE PUMP

The failure of a pump shaft was investigated by means of microstructure analysis,scanning electron microscope (SEM) and tension test. The investigation showed that the failure of shaft was fatigue fracture. The fatigue crack initiated from an axial crack which originated from the key groove of the shaft. The axial crack,which was quenching cracks,was the main cause of the failure of the shaft.