Author(s)

B. Eigenmann

Abstract

Residual stress states can influence the deformation and failure behaviour of compo- nents under mechanical loading both in a beneficial and in a detrimental way. It is well accepted, however, that compressive surface residual stresses can enhance the fatigue limit, and they are often intentionally created when manufacturing structural com- ponents. In this paper, examples are presented for the generation of residual stresses by case hardening and laser treating of steel surfaces. The relaxation behaviour or stability of residual stresses during thermal or mechanical loading is illustrated using shot peened steel as an example. 1 Introduction W 1200-

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