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Asperity level characterization of abrasive wear using atomic force microscopy

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journal contribution
posted on 11.05.2021, 10:26 by Jack WalkerJack Walker, Jamal Umer, Mahdi Mohammad-PourMahdi Mohammad-Pour, Stephanos TheodossiadesStephanos Theodossiades, Stephen R. Bewsher, Guenter Offner, Hemant Bansal, Michael Leighton, Michael Braunstingl, Heinz-Georg Flesch
Using an atomic force microscope, a nanoscale wear characterization method has been applied to a commercial steel substrate AISI 52100, a common bearing material. Two wear mechanisms were observed by the presented method: atom attrition and elastoplastic ploughing. It is shown that not only friction can be used to classify the difference between these two mechanisms, but also the ‘degree of wear’. Archard's Law of adhesion shows good conformity to experimental data at the nanoscale for the elastoplastic ploughing mechanism. However, there is a distinct discontinuity between the two identified mechanisms of wear and their relation to the load and the removed volume. The length-scale effect of the material's hardness property plays an integral role in the relationship between the ‘degree of wear’ and load. The transition between wear mechanisms is hardness-dependent, as below a load threshold limited plastic deformation in the form of pile up is exhibited. It is revealed that the presented method can be used as a rapid wear characterization technique, but additional work is necessary to project individual asperity interaction observations to macroscale contacts.

Funding

DTP 2018-19 Loughborough University

Engineering and Physical Sciences Research Council

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History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences

Volume

477

Issue

2250

Publisher

The Royal Society

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by the Royal Society under the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Acceptance date

10/05/2021

Publication date

2021-06-09

Copyright date

2021

ISSN

1364-5021

eISSN

1471-2946

Language

en

Depositor

Dr Mahdi Mohammad Pour. Deposit date: 10 May 2021

Article number

20210103

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