Prediction of microgeometrical influences on micropitting fatigue damage on 32CrMoV13 steel

► Micropitting in gear teeth is surface fatigue damage. ► Generic roughness profiles were built to identify the main significant parameters. ► Mechanical surface loading obtained using transient elastohydrodynamic code. ► Fatigue lifetime was estimated using semi-analytical stress history and Crossland criterion. ► The main significant parameters are found for steel teeth with and without nitriding