Author(s)

P. O'Hara

Abstract

Residual stress and surface roughness significantly affect component performance. For many years, Engineers have designated roughness constraints on drawings with little heed to residual stress. Fortunately this is changing as industries become aware of the significance of each and both are designated in critical applications. Superfinishing is developing as a post Shot Peening treatment in situations where metal to metal contact occurs, high temperature or fluid flow and/or optimum performance is required. Consequently the combination of residual stress and roughness control are essential on certain applications. Introduction Surface condition was not a critical feature to Engineers many years ago. In fact Shot Peening was an unpredictable black art of questionable benefit. This belief had some foundation many years ago, when occasion

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