Author(s)

D.G. Hattingh & K.H. du Preez

Abstract

The understanding of the relationship between fatigue life, process effects and residual stresses needs to be evaluated carefully before the manufacturing process can be optimised for enhanced quality and product characteristics. Residual stresses in manufactured components are those stresses that exist without prior application of service or external loads. Virtually all manufacturing and surface treatments will introduce residual stresses into a component which may either be beneficial or detrimental to the fatigue properties. This paper investigates the mechanism that exists between fatigue properties and residual stresses and its relation to process effects by withdrawing samples from different stages of the man

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