Fracture analysis of a pulley shaft for the linear motor oil pumping unit in western oilfield of China

The main objective of the present study is to investigate the fatigue failure in the pulley shaft of the linear motor pumping unit after 25 months of service in the western oilfield of China. In order to analyze the fracture mechanism systematically, different testing methods, including the microstructure observation, fluorescent magnetic powder detector, direct-reading spectrometer, material testing machine, pendulum impact testing machine and...