首页|(S185)Tribofilm properties and microcrack morphologies for a carburized SCM420 steel under high-pressure rolling sliding contact fatigue
(S185)Tribofilm properties and microcrack morphologies for a carburized SCM420 steel under high-pressure rolling sliding contact fatigue
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NSTL
Since the internal stress state of the material inevitably changes with cyclic loading and the crack growth behavior changes as the rolling sliding contact fatigue (RCF) process progresses, it is important to understand the relationship between the change in the internal stress state and the crack growth behavior during the RCF. A tribofilm, which is a thin film compound formed on the contact surface, also affects the RCF life.[1] Surface microcracks generated under the RCF were observed in the region without the tribofilm on the surface, suggesting that the distribution of the tribofilm may affect the fatigue life. In this study, the tribofilm properties and surface crack morphologies during RCF tests were investigated for a carburized SCM420 steel. Two types of lubricants which contain different amounts of S-P additives were used to discuss the influence of the lubricant and tribofilm on the RCF damage process. The interrupted specimens were characterized to clarify the change in the crackpropagation behavior during the RCF.
NSTL
