Abstract
Pure rolling contact fatigue tests were carried out on a two-disc machine. The longitudinal cracks were initiated on the specimen surface with pure rolling and rough driving disc conditions. Cracks were easily formed from the initial longitudinal finishing grooves on the surface. The crack distribution in the wear track depended on the elaslohydrodynamic lubrication (EHL) condition. If the film thickness parameter A was less than 0.1, most of the cracks were found at the center part of the wear track. With increasing A, cracks were located towards the two sides of the wear track. When A was greater than 0.5, the initiation of surface cracks was difficult except in the region near the surface defects. Three mechanisms of crack initiation under pure rolling conditions are postulated based on the micro-macro contact mechanics and micro-EHL theory.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 51-58 |
| Number of pages | 8 |
| Journal | Tribology Transactions |
| Volume | 37 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1994 |
| Externally published | Yes |
Funding
This work was supported by the National Science Foundation through Grant MSM-8817869. The authors would like to thank Mr. Charles A. Moyer for helpful discussions.
Keywords
- Contact Fatigue
- Crack Initiation
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Surfaces and Interfaces
- Surfaces, Coatings and Films