Journal of Materials Science

, Volume 7, Issue 5, pp 485–493 | Cite as

Grinding forces and the machining of magnesium oxide crystals

  • B. G. Koepke
  • R. J. Stokes
Papers

Abstract

The forces acting on magnesium oxide crystals during a surface grinding operation have been studied as a function of rate of material removal and crystal orientation, using two different conventional grinding wheels.

The results are discussed in terms of the resulting surface and subsurface damage and the geometry of the wheel-workpiece interaction. The results are consistent with the observations that chip formation occurs by plastic flow under a 46-grit alumina wheel, while material is removed completely by brittle fracture under a 100-grit diamond wheel. It is demonstrated that the stress on an individual chip is within an order of magnitude of the theoretical shear strength of the workpiece, thus accounting for the presence of both surface and subsurface plastic deformation.

Keywords

Polymer Brittle Plastic Deformation Shear Strength Material Removal 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    “Proceedings of a Symposium on the Science of Ceramic Machining and Surface Finishing”, edited by S. Schneider (Nat. Bur. Standards, 1970) to be published.Google Scholar
  2. 2.
    “Ceramic Processing”, Publication 1576 (National Academy of Sciences, Washington, DC, 1968), p. 145.Google Scholar
  3. 3.
    B. G. Kopeke andR. J. Stokes,J. Mater. Sci. 5 (1970) 240.Google Scholar
  4. 4.
    B. G. Kopeke, in Reference 1.Google Scholar
  5. 5.
    R. J. Stokes, in Reference 1.Google Scholar
  6. 6.
    P. J. Gielisse andJ. Stanislao, in Reference 1.Google Scholar
  7. 7.
    E. R. Marshall andM. C. Shaw,Trans. Amer. Soc. Mech. Eng. 74 (1952) 51.Google Scholar
  8. 8.
    W. R. Backer, E. R. Marshall, andM. C. Shaw,ibid 74 (1952) 61.Google Scholar
  9. 9.
    W. R. Backer andM. E. Merchant,ibid 80 (1958) 141.Google Scholar
  10. 10.
    G. S. Reichenbach, J. E. Mayer, S. Kalpakcioglu, andM. C. Shaw,Trans. Amer. Soc. Mech. Eng. 78 (1956) 847.Google Scholar
  11. 11.
    W. R. Backer, discussion to Reference 11,ibid, 857.Google Scholar
  12. 12.
    F. A. Mcclintock andA. S. Argon, “Mechanical Behaviour of Materials”, (Addison-Wesley, Massachusetts, 1966) p. 118.Google Scholar
  13. 13.
    J. F. Bell, “The Physics of Large Deformation of Crystalline Solids”, (Springer-Verlag, New York, 1968).Google Scholar
  14. 14.
    F. P. Bowden andC. A. Brookes,Proc. Roy. Soc. 295A (1966) 244.Google Scholar

Copyright information

© Chapman and Hall Ltd. 1972

Authors and Affiliations

  • B. G. Koepke
    • 1
  • R. J. Stokes
    • 1
  1. 1.Corporate Research CenterHoneywell Inc.HopkinsUSA

Personalised recommendations