Asperity-Level Origins of Transition from Mild to Severe Wear

Physical Review Letters
Ramin AghababaeiJean-Francois Molinari

Abstract

Wear is the inevitable damage process of surfaces during sliding contact. According to the well-known Archard's wear law, the wear volume scales with the real contact area and as a result is proportional to the load. Decades of wear experiments, however, show that this relation only holds up to a certain load limit, above which the linearity is broken and a transition from mild to severe wear occurs. We investigate the microscopic origins of this breakdown and the corresponding wear transition at the asperity level. Our atomistic simulations reveal that the interaction between subsurface stress fields of neighboring contact spots promotes the transition from mild to severe wear. The results show that this interaction triggers the deep propagation of subsurface cracks and the eventual formation of large debris particles, with a size corresponding to the apparent contact area of neighboring contact spots. This observation explains the breakdown of the linear relation between the wear volume and the normal load in the severe wear regime. This new understanding highlights the critical importance of studying contact beyond the elastic limit and single-asperity models.

References

Jun 17, 2005·Nature·Binquan Luan, Mark O Robbins
Jan 18, 2006·The European Physical Journal. E, Soft Matter·C YangB N J Persson
Jul 15, 2006·Science·Anisoara SocoliucErnst Meyer
Oct 15, 2008·Physical Review Letters·Bernd Gotsmann, Mark A Lantz
Feb 27, 2009·Nature·Yifei MoIzabela Szlufarska
Jun 26, 2010·ACS Nano·Jingjing LiuKevin T Turner
Nov 30, 2010·Nature Materials·Lars PastewkaMichael Moseler
Sep 26, 2012·Physical Review Letters·Narayan K SundaramSrinivasan Chandrasekar
Jan 18, 2014·Scientific Reports·Valentin L Popov
Jul 26, 2015·Physical Review Letters·S J EderA Vernes
Jun 7, 2016·Nature Communications·Ramin AghababaeiJean-Francois Molinari
Jul 12, 2017·Proceedings of the National Academy of Sciences of the United States of America·Ramin AghababaeiJean-François Molinari
Jan 6, 2018·Science·Robert W Carpick

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Citations

Oct 20, 2018·Physical Review Letters·J VerschuerenD Dini
Mar 10, 2019·Nature Communications·Enrico MilaneseJean-François Molinari
Nov 21, 2020·Physical Review. E·Enrico MilaneseJean-François Molinari
Nov 21, 2020·Physical Review. E·Aleksandr S GrigorievSergey Yu Tarasov

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