Crack Size Dependency of Shear-Mode Fatigue Crack Threshold in Bearing Steel
Semi-elliptical shear-mode fatigue cracks were promoted in the axial direction of round specimens of SAE52100 bearing steel by fully-reversed cyclic torsion tests under a static axial compressive stress. Non-propagating cracks smaller than 1 mm were obtained in two ways; (i) stress amplitude decreasing tests of notched specimens, or (ii) constant stress amplitude tests of smooth specimens. The threshold stress intensity factor ranges, (KIIth and (KIIIth, showed a crack size dependency.
H.S. Lee, I.S. Yoon and M.H. Aliabadi
S. Muramoto et al., "Crack Size Dependency of Shear-Mode Fatigue Crack Threshold in Bearing Steel", Key Engineering Materials, Vols. 385-387, pp. 449-452, 2008