Generation of acoustic emission from the running-in and subsequent micropitting of a mixed-elastohydrodynamic contact

Hutt, S., Clarke, A. ORCID: https://orcid.org/0000-0002-3603-6000 and Evans, H. P. ORCID: https://orcid.org/0000-0002-6989-0190 2018. Generation of acoustic emission from the running-in and subsequent micropitting of a mixed-elastohydrodynamic contact. Tribology International 119 , pp. 270-280. 10.1016/j.triboint.2017.11.011

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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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Additional Information:	This article is licensed under a Creative Commons Attribution 4.0 International License
Publisher:	Elsevier
ISSN:	0301-679X
Funders:	Engineering and Physical Sciences Research Council
Date of First Compliant Deposit:	10 November 2017
Date of Acceptance:	7 November 2017
Last Modified:	02 May 2023 16:37
URI:	https://orca.cardiff.ac.uk/id/eprint/106404

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