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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

Abstract

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.

Keywords

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

References

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    Fractography and Atlas of Fractographs, Vol 9, 8th ed., Metals Handbook, American Society for Metal, Metals Park, OH (1974).Google Scholar
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    Failure Analysis and Prevention, Vol 11, 9th ed., Metals Handbook, American Society for Metals, Metals Park, OH (1986).Google Scholar
  3. 3.
    S. Suresh, Fatigue Material, Fatigue of Materials. 2nd ed., Cambridge University (1998).Google Scholar

Copyright information

© ASM International 2007

Authors and Affiliations

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

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