Journal of Failure Analysis and Prevention

, Volume 11, Issue 6, pp 705–709 | Cite as

A Study of Premature Failure of Crusher Jaws

  • J. O. Olawale
  • S. A. Ibitoye
  • M. D. Shittu
  • A. P. I. Popoola
Technical Article---Peer-Reviewed

Abstract

In this article, we report the outcome of an investigation made to uncover the premature fracture of crusher jaws produced in a local foundry. A crusher jaw that had failed while in service was studied through metallographic techniques to determine the cause of the failure. Our investigation revealed that the reason for the fracture was the presence of large carbides at the grain boundaries and in the grain matrix. This led to the formation of microcracks that propagated along the grain boundaries under in-service working forces. It is also believed that the precipitation of carbides at the grain boundaries may have occurred because of improper heat treatment, but not because of a deficiency in composition.

Keywords

Brittle fracture Carbides Embrittlement Grain boundary Microstructure 

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Copyright information

© ASM International 2011

Authors and Affiliations

  • J. O. Olawale
    • 1
  • S. A. Ibitoye
    • 1
  • M. D. Shittu
    • 1
  • A. P. I. Popoola
    • 1
    • 2
  1. 1.Department of Materials Science and EngineeringObafemi Awolowo UniversityIle-IfeNigeria
  2. 2.Department of Chemical and Metallurgical EngineeringTshwane University of TechnologyPretoriaSouth Africa

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