Journal of Failure Analysis and Prevention

, Volume 14, Issue 2, pp 236–246 | Cite as

Analysis of a Premature Failure of a Hub from a Diesel Generator of a High-Speed Motor Ship

  • D. G. Karalis
  • N. Ε. Melanitis
Technical Article---Peer-Reviewed


Failure analysis is carried out on a fractured hub obtained from a diesel generator of a high-speed motor ship. Macrofractography, microfractography, standard optical metallography, material characterization techniques, and numerical modeling were used to verify the findings of the current investigation. Cracking initiation is attributed to fretting fatigue caused by a modification performed in the vicinity of the fractured hub. Operational vibrations contributed to the propagation of the cracks as typical fatigue cracks until final fracture.


Failure analysis Grey cast iron Crankshaft hub Fretting fatigue 


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© ASM International 2014

Authors and Affiliations

  1. 1.Mechanics & Materials Division, Marine Materials LaboratoryHellenic Navy, Hellenic Naval AcademyPiraeusGreece

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