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Abstract

Superplasticity may be defined as the phenomenon whereby large uniform elongations are possible in metallic alloys under low applied tensile loads when four specific conditions are fulfilled, namely:
  1. i)

    that the microstructure be extremely fine and stable (normally ~5 urn grain/phase diameter).

     
  2. ii)

    that deformation be carried out at temperatures in excess of half the absolute melting point.

     
  3. iii)

    that the material be deformed at a strain-rate in the range 10−5−10−1sec−1.

     
  4. iv)

    that no weak or brittle phases are present to cause premature failure.

     

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References

  1. 1).
    Johnson, R.H., Metall. Rev. 15, 145 (1970).CrossRefGoogle Scholar
  2. 2).
    Davies, G.J., J.W. Edington, C.P. Cutler and K.A. Padmanabhan, J. Mater Sci. 5, 109 (1970).CrossRefGoogle Scholar
  3. 3).
    Nicholson, R.B., Plasticity and Superplasticity, Institute of Metallurgists, 1969.Google Scholar
  4. 4).
    Ball, A. and M.M. Hutchinson, Met. Sci. J. 3, 1 (1969).CrossRefGoogle Scholar
  5. 5).
    Hart, E. W., Acta Met. 15, 1545 (1967).CrossRefGoogle Scholar
  6. 6).
    Sherby, O.D. and P.M. Burke, Prog. Mat. Sci. 13, 325 (1968).CrossRefGoogle Scholar
  7. 7).
    Ahlquist, C.N. and R.A. Menezes, Mat. Sci. Eng. 7, 223 (1971).CrossRefGoogle Scholar
  8. 8).
    Ashby, M. F., Scripta Met. 3, 837 (1969).CrossRefGoogle Scholar
  9. 9).
    Anwar V. Karim and W.A. Backofen, Met. Trans. 3, 709 (1972).CrossRefGoogle Scholar
  10. 10).
    Crane, T., G. L. Dunlop, E. Shapiro and D. M. R. Taplin, to be published (Met. Trans 1973).Google Scholar
  11. 11).
    Dunlop, G. L. and D. M. R. Taplin, J. Mater. Sci. 7, 84 (1972).ADSCrossRefGoogle Scholar
  12. 12).
    Dunlop, G.L. and D.M.R. Taplin, J. Mater. Sci. 7, 316 (1972).ADSCrossRefGoogle Scholar
  13. 13).
    Dunlop, G.L. and D.M. R. Taplin, J. Aust. Inst. Met. 16, 195 (1971).Google Scholar
  14. 14).
    Taplin, D. M. R. and S. Sagat, Mat. Sci. Eng. 9, 53 (1972).CrossRefGoogle Scholar
  15. 15).
    Backofen, W.A., I.R. Turner and D.H. Avery, Trans. Amer. Soc. Metals 10, 908 (1964).Google Scholar
  16. 16).
    Watts, B. M. and M. J. Stowell, J. Mater. Sci. 6, 228 (1971).ADSCrossRefGoogle Scholar
  17. 17).
    Bright, M.W.A. and D.M.R. Taplin, ASM/AIME Conference on Copper, Cleveland 1972 (Preprint).Google Scholar
  18. 18).
    Packer, C. M., R.H. Johnson and O.D. Sherby, Trans Aime 242, 2498 (1968).Google Scholar
  19. 19).
    Naziri, H. and R. Pearce, J. Inst. Metals 98, 71 (1970).Google Scholar
  20. 20).
    Padmanabhan, K.A. and G.J. Davies, Rheol. Acta 13, (1974).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1975

Authors and Affiliations

  • M. W. A. Bright
    • 1
  • D. M. R. Taplin
    • 2
  1. 1.Centre de Recherches Industrielle du QuébecSecteur MatériauxSte-Foy, Québec 10Canada
  2. 2.Department of Mechanical EngineeringUniversity of WaterlooWaterlooCanada

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