Influence of Initial Residual Stress on Material Properties of Bearing Steel During Rolling Contact Fatigue

X-Ray Diffraction Residual Stress Measurements for Assessment of Rolling Contact Fatigue Behaviour of Railway Steels

“…After 40 millions cycles we can see that, as a result of the accumulation of plastic microdeformation during cyclic stressing under rolling contact loading conditions, the initial tensile stresses at greater depth are changed to compressive. The rolling contact loading develop large compressive residual stresses in both directions within a surface layer with more than 700 µm, which drastically changed the initial residual stress state introduced by the machining of the discs and is in agreement with other results found in the literature [8][9][10][11][12][13][14]. Two different effects of the rolling contact fatigue can be observed: (i) the higher values at the extreme surface, induced by the direct action of the contact, and (ii) maximums of compressive residual stresses at a depth of 400 µm and of the X-ray diffraction peak breadth distribution at a depth of about 200 µm, that should be related to the action of the maximum in-depth hertzian stresses.…”

Modelling dislocation assisted tempering during rolling contact fatigue in bearing steels

“…It is likely that the initial compressive residual stress may result in different plastic deformation behaviour under rolling contact fatigue, and change Dc C . Based on the fact that hardness have altered less with the initial residual stress [35], Dc C may change to the range where dislocation assisted tempering cannot take place. A more detailed study seems necessary for further verification.…”

“…Likewise, changing other parameters would alter Dc C . The influence of initial residual stress has recently been reported [35,36]. It is likely that the initial compressive residual stress may result in different plastic deformation behaviour under rolling contact fatigue, and change Dc C .…”

Effects of Pulsed Magnetic Fields of Different Intensities on Dislocation Density, Residual Stress, and Hardness of Cr4Mo4V Steel

“…Several investigations have shown that a certain degree of residual compressive stress could delay the occurrence of RCF failure of bearing steel [4][5][6][7][8][9]. Bryan, et al [5] found that the material properties of AISI M50 bearing balls with initial residual compressive stress change less than those without this initial stress. Dommarco, et al [6] revealed that the existence of residual compressive stress delayed the occurrence of fatigue failure of the SAE 52100 steel.…”