453 Surface Crack Growth from Artificial Defects in SUJ2 under Rolling Contact Fatigue
Details
Understandig the surface crack growth is important to clarify the mechanisms of rolling contact fatigue (RCF) of SUJ2, because the surface defects are made by indentations and cause flaking failure. In the present work, the small holes were artificially made prior to the RCF tests and the initiation and propagation of the surface cracks from the holes were observed. Based on the features obtained by the experiments, the initiation and propagation of the cracks were evaluated by calculating stress intensity factors.
