Fracture and Wear Failure of a Locomotive Turbocharger-Bearing Sleeve
An investigation was conducted to determine what caused a bearing sleeve in a locomotive turbocharger to fail. The sleeve, which is made of nitrided 38CrMoAl steel, fractured at the transition fillet between the cylinder and plate. Visual examination revealed significant wear on the external surface of the cylinder, with multiple origin fatigue fracture appearing to be the dominant fracture mechanism. Metallurgical examination indicated that the nitrided layer was not as deep as it was supposed to be and had worn away on the outer surface of the sleeve, exposing the soft matrix underneath. This led to further wear and...
Xiaolei Xu, Zhiwei Yu, Yuzhen Chen, Fracture and Wear Failure of a Locomotive Turbocharger-Bearing Sleeve, Handbook of Case Histories in Failure Analysis, Vol 3, Edited By Larry Berardinis, ASM International, 2019, p 669–674, https://doi.org/10.31399/asm.fach.v03.c9001847
Download citation file: