Residual Stress & its Effect on Service

Abstract

Presence of residual stresses in a component either improves or impairs its service life, depending on the type and distribution of stresses in relation to service sstresses. This paper reviews the origin of different types of residual stresses, thermal, transformational and mechanically induced.Nature of thermal and trans-formational stresses involved in quenching tempering, in spot and butt welding induction and flame hardening, nitr-iding, case carburising, stresses of mechanical origin as in strip rolling, wire drawing, surface rolling and shot peening have been discussed with their respective stress distribution patterns. The effect of different types of residual stresses originating in these process-ings is discussed.