Author(s)

H.W. Theunissen, D.G. Hattingh, J. Maczek, A. Els-Botes

Abstract

A critical evaluation of residual stresses in spheroidal graphite cast iron due to mechanical testing HW Theunissen, D.G. Hattingh, J Maczek, A. Els-Botes Department of Mechanical Engineering, Port Elizabeth Technikon, Private BagX6011, Port Elizabeth, South Africa EMail: danieh@ml.petech.ac.za Abstract The understanding of the relationship between residual stresses and the effects of mechanical testing on these stresses needs to be evaluated to develop a testing method to ensure the separation of Grey Cast Iron and Spheroidal Graphite (SG) Cast Iron for Automotive Safety Critical Components. Residual Stresses in manufactured components are those stresses that exist without prior application of service or external loads'. Virtually all manufacturing and surface treatments induce residual stresses into a component which may either be beneficial or detrimental to the mechanical properties. This paper investigates the effect of an applied load on the residual stresses wi

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