On the Uniqueness of Wear Coefficient for Abrasive Wear at NanoscaleSource: Journal of Tribology:;2023:;volume( 145 ):;issue: 006::page 62101-1DOI: 10.1115/1.4062099Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Materials wear is often characterized by empirical relations as the physical and chemical interactions at sliding interfaces are not fully understood at any length scale. Recent studies showed that these wear relations do not always hold in particular at the nanoscale. Here we discuss the validity range and limitations of two well-known wear models, i.e., Archard’s and Reye’s ones (which were principally developed for adhesive wear) for an abrasive wear process. Using systematic long-timescale molecular dynamic nanoscratching simulations, we show that, at the nanoscale, the wear coefficient increases by the adhesion strength and scratching depth and eventually saturates to a constant value. The saturation is associated with the transition from atomic attrition wear mode to plasticity-induced wear. This new understanding rationalizes discrepant experimental observations on the validity of Archard’s wear relation at the nanoscale. Furthermore, it confirms that a depth- and adhesion-independent wear coefficient can be obtained when plastic deformation dictates the abrasive wear process.
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contributor author | Ma, Li | |
contributor author | Aghababaei, Ramin | |
date accessioned | 2023-08-16T18:04:26Z | |
date available | 2023-08-16T18:04:26Z | |
date copyright | 3/16/2023 12:00:00 AM | |
date issued | 2023 | |
identifier issn | 0742-4787 | |
identifier other | trib_145_6_062101.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4291355 | |
description abstract | Materials wear is often characterized by empirical relations as the physical and chemical interactions at sliding interfaces are not fully understood at any length scale. Recent studies showed that these wear relations do not always hold in particular at the nanoscale. Here we discuss the validity range and limitations of two well-known wear models, i.e., Archard’s and Reye’s ones (which were principally developed for adhesive wear) for an abrasive wear process. Using systematic long-timescale molecular dynamic nanoscratching simulations, we show that, at the nanoscale, the wear coefficient increases by the adhesion strength and scratching depth and eventually saturates to a constant value. The saturation is associated with the transition from atomic attrition wear mode to plasticity-induced wear. This new understanding rationalizes discrepant experimental observations on the validity of Archard’s wear relation at the nanoscale. Furthermore, it confirms that a depth- and adhesion-independent wear coefficient can be obtained when plastic deformation dictates the abrasive wear process. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | On the Uniqueness of Wear Coefficient for Abrasive Wear at Nanoscale | |
type | Journal Paper | |
journal volume | 145 | |
journal issue | 6 | |
journal title | Journal of Tribology | |
identifier doi | 10.1115/1.4062099 | |
journal fristpage | 62101-1 | |
journal lastpage | 62101-6 | |
page | 6 | |
tree | Journal of Tribology:;2023:;volume( 145 ):;issue: 006 | |
contenttype | Fulltext |