Abstract
From the macroscopic point of view, the results of hydrogen embrittlement of pearlitic steel strongly depend on compressive residual stresses generated in the vicinity of the crack tip by fatigue precracking of the specimens (the relevant variable is the maximum stress intensity factor during the last stage of fatigue precracking. As far as the kinetic crack growth curve is concerned, the threshold stress intensity value for hydrogen-assisted cracking does not have an intrinsic character but depends on the distribution of compressive residual stresses in the vicinity of the crack tip and, therefore, on the maximum stress intensity factor during the last stage of fatigue precracking.
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