Generation of Acoustic Emission from the running-in and subsequent micropitting of a mixed-elastohydrodynamic contact

Generation of Acoustic Emission from the running-in and subsequent micropitting of a... This paper presents the use of Acoustic Emission to study the running-in and subsequent micropitting of a pair of hardened steel surfaces under mixed lubrication conditions. These surfaces were loaded together under rolling/sliding conditions typical of heavily loaded gearing. Relocation profilometry was used to measure the rapid running-in process and the development of micropits. Acoustic emission (AE) was found to be highly sensitive to both the initial changes in surface topography during the running-in process, and to subsequent changes caused by micropit formation. However, AE appears to be sensitive to changes in asperity interaction rather than the underlying mechanisms of plastic deformation, crack growth and fracture. It is concluded that AE can provide considerable insight into conditions in mixed-elastohydrodynamic contacts. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Tribology International Elsevier

Generation of Acoustic Emission from the running-in and subsequent micropitting of a mixed-elastohydrodynamic contact

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Publisher
Elsevier
Copyright
Copyright © 2017 The Authors
ISSN
0301-679X
eISSN
1879-2464
D.O.I.
10.1016/j.triboint.2017.11.011
Publisher site
See Article on Publisher Site

Abstract

This paper presents the use of Acoustic Emission to study the running-in and subsequent micropitting of a pair of hardened steel surfaces under mixed lubrication conditions. These surfaces were loaded together under rolling/sliding conditions typical of heavily loaded gearing. Relocation profilometry was used to measure the rapid running-in process and the development of micropits. Acoustic emission (AE) was found to be highly sensitive to both the initial changes in surface topography during the running-in process, and to subsequent changes caused by micropit formation. However, AE appears to be sensitive to changes in asperity interaction rather than the underlying mechanisms of plastic deformation, crack growth and fracture. It is concluded that AE can provide considerable insight into conditions in mixed-elastohydrodynamic contacts.

Journal

Tribology InternationalElsevier

Published: Mar 1, 2018

References

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