Multiscale modelling strategy for predicting fatigue lives and limits of steels based on a generalised evaluation method of grain boundaries effects

•Multiscale modelling strategy for predicting fatigue lives and limits of steels was proposed.•Strategy is applicable to both low-grade ferrite and high-grade bainite steels.•Macroscopic FEA, microstructure, and crack growth models were integrated.•Predicted results by the strategy was compared with...

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