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The micromagnetic Barkhausen noise as a nondestructive testing method was employed in this work to analyze the fatigue behavior of high-strength steels by subjecting them to multi-stage load increase fatigue tests. The micromagnetic Barkhausen noise energy (MBN Energy ) was measured during fatigue tests and coupled with digital image correlation to evaluate the effect of static and cyclic stress as well as local surface strain on MBN Energy . The test samples were prepared from the forged bainite 18MnCrMoV6 and two ferrite-pearlite 38MnVS6 and 46MnVS5 steels. A part of the specimens was pre-strained before cyclic loading to analyze the effect of pre-deformation on cyclic strength considering measured MBN Energy . A significant increase in MBN Energy  was observed by increasing the cyclic load on 18MnCrMoV6 specimens with bainite phases while this increase of MBN Energy  was not significant or was not changed for ferrite-pearlite steels 38MnVS6 and 46MnVS5.

Influence of pre-deformation on fatigue life of high strength steels by means of micromagnetic Barkhausen noise