Investigation of Residual Stress Distribution of Wheel Rims Using Neutron Diffraction

摘要: Damage accumulation due to fatigue significantly reduces the safety of railway vehicles. Shattered wheel rim failures are result large cracks that propagate roughly parallel tread surface. The stress, most likely wheel/rail impact or material discontinuity, is responsible for initiation shattered rims. voids and inclusions sufficient size in a stress field will also lead failure wheels. Significant improvements have been made recent years prevent failure. ‘new’ wheels better resistance failure, fact circumferential residual on new must be compressive comply with requirements international standard EN 13262. However, this may not necessarily apply millions ‘old’ still currently use. At moment measurements carried out using destructive methods (such as slitting hole drilling), quantitatively ultrasound method obtaining average across whole section. main objective research was non-destructive neutron diffraction measure distribution manufactured condition.