Article ID Journal Published Year Pages File Type
778492 International Journal of Fatigue 2011 10 Pages PDF
Abstract

The paper gives an overview of the present state of research on fatigue strength and failure mechanisms at very high number of cycles (Nf > 107). Testing facilities are listed. A classification of materials with typical S–N curves and influencing factors like notches, residual stresses and environment are given. Different failure mechanisms which occur especially in the VHCF-region like subsurface failure are explained. There microstructural inhomogeneities and statistical conditions play an important role. A double S–N curve is suggested to describe fatigue behaviour considering different failure mechanisms. Investigated materials are different metals with body-centred cubic lattice like low- or high-strength steels and quenched and tempered steels but also materials with a face-centred cubic lattice like aluminium alloys and copper. Recommendations for fatigue design of components are given.

Related Topics
Physical Sciences and Engineering Engineering Mechanical Engineering
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