A Study of Premature Failure of Crusher Jaws

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 reveale...

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Bibliographic Details
Published in:Journal of failure analysis and prevention 2011-12, Vol.11 (6), p.705-709
Main Authors: Olawale, J. O., Ibitoye, S. A., Shittu, M. D., Popoola, A. P. I.
Format: Article
Language:English
Subjects:
Applied sciences
Carbides
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Corrosion and Coatings
Crushers
Crushing. Screening (sizing). Classification
Exact sciences and technology
Failure
Failure analysis
Fracture mechanics
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Grain boundaries
Materials Science
Metals. Metallurgy
Microcracks
Ores
Physics
Precipitation
Production of metals
Quality Control
Reliability
Safety and Risk
Solid Mechanics
Structural and continuum mechanics
Technical Article > -Peer-Reviewed
Tribology
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Summary: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.
ISSN:1547-7029
1728-5674
1864-1245
DOI:10.1007/s11668-011-9511-7