Prediction of the S– N curves of high-strength steels in the very high cycle fatigue regime

Methods to predict the S– N curves of high-strength steels in the very high cycle fatigue (VHCF) regime are reviewed. At the same time, a new prediction in form of Basquin’s equation is proposed based on the prediction of fatigue strengths in both high cycle fatigue regime and very high cycle fatigue regime. The new prediction is compared to the prior predictions and experiments results obtained by our recent experiment and others’ published papers.