Tribology Letters

, Volume 7, Issue 1, pp 51–56 | Cite as

Hardness of a surface containing uniformly spaced pyramidal asperities

  • M.S. Bobji
  • S.K. Biswas
Article

Abstract

Pyramidal asperities of different apical angle were machined on a flat copper surface. Hardness was estimated from the load–displacement graphs obtained by pressing a spherical rigid indenter onto the asperities. The variation of hardness with apical angle and pitch was recorded with a view to contributing to the development of a general framework for relating measured hardness to the surface roughness.

surface roughness indentation multiple asperities contact 

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References

  1. [1]
    W.C. Oliver, R. Hutchings and J.B. Pethica, in: Microindentation Techniques in Materials Science and Engineering, ASTM STP 889, <nt>eds.</nt> P.J. Blau and B.R. Lawn (American Society for Testing and Materials, Philadelphia, 1986) p. 90.Google Scholar
  2. [2]
    D.L. Joslin and W.C. Oliver, J. Mater. Res. 5 (1990) 123.Google Scholar
  3. [3]
    J. Mencik and M.V. Swain, J. Mater. Res. 10 (1995) 1491.Google Scholar
  4. [4]
    D. Tabor, The Hardness of Metals (Clarendon Press, Oxford, 1951).Google Scholar
  5. [5]
    M.S. Bobji, S.K. Biswas and J.B. Pethica, Appl. Phys. Lett. 73 (1997) 1059.CrossRefGoogle Scholar
  6. [6]
    M.S. Bobji, M. Fahim and S.K. Biswas, Tribol. Lett. 2 (1996) 381.CrossRefGoogle Scholar
  7. [7]
    M.S. Bobji and S.K. Biswas, J. Mater. Res. 13 (1998) 3227.Google Scholar
  8. [8]
    M.S. Bobji and S.K. Biswas, in: Surface Modification Technologies X, <nt>ed.</nt> T.S. Sudhardsan (The Institute of Metals, London, 1997).Google Scholar
  9. [9]
    H.A. Fransis, Wear 45 (1977) 221.CrossRefGoogle Scholar
  10. [10]
    K.L. Johnson, Contact Mechanics (Cambridge Univ. Press, Cambridge, 1971).Google Scholar

Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • M.S. Bobji
    • 1
  • S.K. Biswas
    • 1
  1. 1.Department of Mechanical EngineeringIndian Institute of ScienceBangaloreIndia

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