Asperity level characterization of abrasive wear using atomic force microscopy.

Content Provider	Europe PMC
Author	Walker, Jack Umer, Jamal Mohammadpour, Mahdi Theodossiades, Stephanos Bewsher, Stephen R. Offner, Guenter Bansal, Hemant Leighton, Michael Braunstingl, Michael Flesch, Heinz-Georg
Copyright Year	2021
Abstract	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.
Related Links	https://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC8336757&blobtype=pdf
ISSN	13645021
Journal	Proceedings. Mathematical, Physical, and Engineering Sciences [Proc Math Phys Eng Sci]
Volume Number	477
DOI	10.1098/rspa.2021.0103
PubMed Central reference number	PMC8336757
Issue Number	2250
PubMed reference number	35153566
e-ISSN	14712946
Language	English
Publisher	The Royal Society Publishing
Publisher Date	2021-06-09
Access Restriction	Open
Rights License	Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. © 2021 The Authors.
Subject Keyword	wear abrasive atomic force microscope nanoscale friction
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mathematics Engineering