Author(s)

T. Raaul, S.A. Meguid & A.Q. Khan

Abstract

Effect of pre- and post-processing upon shot-peening residual stresses T. Raaul,* S.A. Meguid/ A.Q. Khan* "Research Laboratories, Government of Pakistan, P.O. Box 502, Rawalpindi, Pakistan ^Department of Mechanical Engineering, University of Toronto, Ontario, M5S 1A4 Canada ABSTRACT The process of shot-peening finds extensive use in industry to combat fatigue fracture in engineering components. The introduction of compressive residual stresses increases the fatigue life considerably and forms an integral part of the design process. Although the benefits of the shot-peening process are well established, all investigations overlook the history of the component being treated. This increases the scatter in the results and makes them unreliable. Also, although researchers are aware that post-processes performed on treated components reduce and redistribute the peening compressive residual stresses, no experime

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