Fatigue Evaluation of a Nodular Cast Iron Component

Paper #:
  • 920669

Published:
  • 1992-02-01
Citation:
DuQuesnay, D., Yu, M., Topper, T., and Dabell, B., "Fatigue Evaluation of a Nodular Cast Iron Component," SAE Technical Paper 920669, 1992, https://doi.org/10.4271/920669.
Pages:
9
Abstract:
A ferritic-pearlitic nodular iron automobile suspension knuckle was fatigue tested in the laboratory using a constant amplitude load level that simulated a severe service condition. It was found that cracks always initiated from surface casting defects and that the fatigue life could be extended significantly by machining away the as-cast surface in the fatigue sensitive locations. Both local strain and fracture mechanics approaches were used successfully to predict the fatigue life of the component.
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