Surface Characterization of Components Subjected to Deep Rolling for Cyclic Loading Applications

Deep rolling is mainly employed to induce compressive residual stresses and cold work straining on cyclically loaded parts. Additionally, surface roughness can be improved and, as a result, the fatigue strength of the component is increased. The principal aim of this work is to investigate the influence of deep rolling parameters (rolling pressure and number of passes) on the surface Quality and residual stresses induced on AISI 1060 high carbon steel specimens. The results indicated that the surface roughness parameters decrease drastically after deep rolling and lowest roughness values are obtained applying a pressure of 100 bar and 3 rolling passes. As far as the residual stress is concerned, the tensile stress recorded on the surface of the specimens after turning shifted to compressive stress after deep rolling. In contrast to the residual stress values, which did not present a straightforward relationship with deep rolling parameters, the full width at half maximum values indicated that more accentuated work hardening is obtained when rolling pressure is elevated to 200 MPa.