Journal of Failure Analysis and Prevention

, Volume 12, Issue 4, pp 375–381 | Cite as

Contact Fatigue Damage and Fracture Failure of a Bearing Outer-Race Used on a Locomotive Wheelset

  • Xiao-lei Xu
  • Zhi-wei Yu
  • Zhi Yang
Technical Article---Peer-Reviewed


Fracture took place on the upper-edge of one side of the bearing outer-ring used in a locomotive wheel in service, and two small pieces had separated from the outer-ring. The fractographic study indicates that the fracture mode is of instantaneous initial cracking and fatigue propagation. Fracture of the edge was caused by abnormally high contact loading on the upper-end of one race of the bearing cup. Extensive spalling is present on the upper part of the raceway of the broken side of the bearing outer-ring, and the surface contact fatigue is its primary failure mode. The occurrence of a large inclined load on the raceway of one side of outer-ring is responsible for the serious spalling damage on the raceway of the outer-ring.


Bearing outer-ring Surface contact fatigue Inclined load Spalling damage Fracture 


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Copyright information

© ASM International 2012

Authors and Affiliations

  1. 1.College of Electromechanics and Material EngineeringDalian Maritime UniversityDalianPeople’s Republic of China

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