The determination of the material fatigue limit is important with regard to the determination of safe service life of structural materials. Depending on the type of treatment and the type and size of introduced stresses, technological procedures can affect negatively or positively the fatigue properties of steel. Based on literature research and our own research, the article presents the influence of selected technological factors on fatigue properties. Our own studies were performed with the use of load high frequencies of 20 kHz in the ultra-high-cyclic area.

The determination of the material fatigue limit is important with regard to the determination of safe service life of structural materials. Depending on the type of treatment and the type and size of introduced stresses, technological procedures can affect negatively or positively the fatigue properties of steel. Based on literature research and our own research, the article presents the influence of selected technological factors on fatigue properties. Our own studies were performed with the use of load high frequencies of 20 kHz in the ultra-high-cyclic area.