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Tribology Letters

, Volume 41, Issue 1, pp 1–15 | Cite as

Role of Surface Texture, Roughness, and Hardness on Friction During Unidirectional Sliding

  • Pradeep L. Menezes
  • Kishore
  • Satish V. Kailas
  • Michael R. Lovell
Original Paper

Abstract

In the present investigation, experiments were conducted by unidirectional sliding of pins made of FCC metals (Pb, Al, and Cu) with significantly different hardness values against the steel plates of various surface textures and roughness using an inclined pin-on-plate sliding apparatus in ambient conditions under both the dry and lubricated conditions. For a given material pair, it was observed that transfer layer formation and the coefficient of friction along with its two components, namely adhesion and plowing, are controlled by the surface texture of the harder mating surfaces and are less dependent of surface roughness (R a) of the harder mating surfaces. The effect of surface texture on the friction was attributed to the variation of the plowing component of friction for different surfaces. It was also observed that the variation of plowing friction as a function of hardness depends on surface textures. More specifically, the plowing friction varies with hardness of the soft materials for a given type of surface texture and it is independent of hardness of soft materials for other type of surface texture. These variations could be attributed to the extent of plane strain conditions taking place at the asperity level during sliding. It was also observed that among the surface roughness parameters, the mean slope of the profile, Δ a, correlated best with the friction. Furthermore, dimensionless quantifiable roughness parameters were formulated to describe the degree of plowing taking place at the asperity level.

Keywords

Friction Surface roughness Surface texture Hardness 

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Pradeep L. Menezes
    • 1
    • 3
  • Kishore
    • 1
  • Satish V. Kailas
    • 2
  • Michael R. Lovell
    • 3
  1. 1.Department of Materials EngineeringIndian Institute of ScienceBangaloreIndia
  2. 2.Department of Mechanical EngineeringIndian Institute of ScienceBangaloreIndia
  3. 3.Department of Industrial EngineeringUniversity of Wisconsin-MilwaukeeMilwaukeeUSA

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