✍ Scribed by C. Berger; B. Pyttel; D. Schwerdt
No coin nor oath required. For personal study only.
The paper gives an overview to the present state of research on fatigue strength and failure mechanisms at very high number of cycles (N>10^7^). 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. 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.
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