An imprint method to produce surface asperities for EHL and RCF experiments
- Resource Type
- Authors
- Everitt, Carl-Magnus; Alfredsson, Bo; Öberg, Martin
- Source
- Subject
- Asperities
Contact Mechanics
Elastohydrodynamic lubrication
Rough Surface
Imprint
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Tribologi (ytteknik omfattande friktion, nötning och smörjning)
- Language
- English
- ISSN
- 2020-0226
A method was developed for creating single well defined surface asperities using an imprint technique. The proposed method can be used to create asperities of different heights and widths in the micrometre range. The technique for creating single surface asperities is based on rolling a hard disc with indents against a soft disc. The contact pressure will cause plastic deformation forcing material into the indents to create the asperities. The height of the asperities can be controlled by adjusting the applied force. After initial reshaping during the run-in process, the asperities were strong enough to survive more than 35 million EHL contact cycles. The method should thus be of great interest for the researchers investigating rolling contact fatigue experimentally. The method could also aid the research of the run in process by enabling tracing the development of specific surface defects. Since the method can produce high and strong asperities it might also prove useful for investigations of exactly how asperities deform under sever contacts conditions. QC 20200226