The Influence of Superficial Layer Parameters on Fatigue Strength

Abstract

This paper was studied the evolution of roughness surface finish and the Vickers microhardness, for S355JR steel grade samples, under a constant amplitude fatigue loading. Several bending fatigue tests were carried out using flat specimens. This paper has aimed the appreciation of the metallic surface integrity evolution subjected to the fatigue processes on the basis of the links between the surface roughness evolution, as a geometrical aspect, and the microhardness evolution as a physical aspect.