In order to elucidate the influence of the work hardening phenomenon caused by repeated contact stress on the rolling contact fatigue strength of austenitic stainless stell (SUS 304), an experimental study was conducted by using a Nishihara-type wear testing machine under lubricated state.
The results obtained are summarized as follows:
(1) The rolling contact fatigue endurance limit of SUS 304 stainless steel increased remarkably with work hardning generated by repeated contact stress.
(2) The rolling contact fatigue endurance limit of SUS 304 stainless steel decreased with increasing slip ratio.
(3) The depth of crack propagation in SUS 304 stainless steel was deeper than the region at which the stress value calculated according to the maximum shearing stress theory reached the maximum, regardless slip ratio.