Tribology Letters

, 33:63 | Cite as

A Novel Method for Quantitative Determination of Ultra-low Wear Rates of Materials, Part II: Effects of Surface Roughness and Roughness Orientation on Wear

  • Y.-R. Li
  • D. Shakhvorostov
  • W. N. Lennard
  • P. R. Norton
Original Paper


A novel method of measurement of the very low wear-rates of materials in the ultra-mild wear regime, which involves the use of implanted gold as a marker, was used to understand the effects of surface roughness and roughness orientation on wear under reciprocating sliding conditions. AISI 1095 steel coupons with various Vickers hardness values and different surface roughness and roughness orientation relative to the sliding direction were tested under the same sliding conditions. It was found that parallel sliding causes more wear compared with transverse sliding for the harder samples (Vickers hardness (VH); 450 HV, 650 HV and 1000 HV). Furthermore, the average friction coefficient of parallel sliding is also higher than that of transverse sliding for these samples. Severe wear takes place when the samples are too soft (250 HV), resulting in the complete loss of implanted gold. Surface topographic images were taken before and after the wear tests. It was found that parallel sliding dramatically increases the surface roughness, while transverse sliding does not increase the surface roughness for harder samples (450 HV, 650 HV and 1000 HV). For the soft sample (250 HV), the surface roughness increases significantly under parallel or transverse sliding.


Surface roughness Wear/failure testing devices Wear mechanisms 



The authors acknowledge Mr. Jack Hendriks of Tandetron Laboratory, the University of Western Ontario, for help with RBS measurement. The authors also thank Q. Jane Wang, Department of mechanical engineering Northwestern University, for the insightful discussion and her encouragement of this work.


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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Y.-R. Li
    • 1
    • 2
  • D. Shakhvorostov
    • 1
  • W. N. Lennard
    • 1
  • P. R. Norton
    • 1
  1. 1.Department of ChemistryUniversity of Western OntarioLondonCanada
  2. 2.Chevron Oronite Company LLCRichmondUSA

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