Journal of Failure Analysis and Prevention

, Volume 7, Issue 5, pp 316–320 | Cite as

Failure Analysis of a Diesel Engine Connecting Rod

  • Xiao Lei Xu
  • Zhi Wei Yu
Case History


A failure investigation has been conducted on a diesel engine connecting rod. The fracture occurred at the small head of the connecting rod. Visual and scanning electron microscopy observations show that a lot of axial grooves appear on the internal surface close to the fracture and the fatigue cracks initiated from the axial grooves. Fractography indicates that the multiple-origin fatigue fracture is the dominant failure mechanism. The machining or assembling process was responsible for the formation of the axial grooves.


Connecting rod Failure analysis Groove Multiple-origin fatigue fracture Surface damage 


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Copyright information

© ASM International 2007

Authors and Affiliations

  1. 1.Electromechanics and Material Engineering CollegeDalian Maritime UniversityDalianP.R. China

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