Skip to main content
SpringerLink
Log in

The fracture characteristics of a superplastic single phase copper alloy

  • Papers
  • Published:
Journal of Materials Science Aims and scope Submit manuscript

Abstract

A superplastic single phase copper alloy exhibits a sigmoidal relationship between strain rate and stress at 823 K, dividing the behaviour into three regions. Maximum elongation to fracture (∼380%) occurs at intermediate strain rates at the lower end of region II, and there is a decrease in total elongation at both low (region I) and high (region III) strain rates. No necking is observed in regions I and II, and there is only very slight necking in region III. Internal cavities are formed at all strain rates, but the appearance of the cavities depends critically on the imposed strain rate. At high strain rates, the cavities are small and lie in strings parallel to the tensile axis; but as the strain rate is reduced the cavities become larger, more rounded, and essentially randomly distributed. The mode of failure is ductile rupture in region III, but void growth and interlinkage become increasingly important with decreasing strain rate.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. R. H. Johnson, Met. Rev. 15 (1970) 115.

    Google Scholar 

  2. D. M. R. Taplin, G. L. Dunlop, S. Sagat and R. H. Johnson, “Proceedings of the 2nd Interamerican Conference on Materials Technology” Vol. I (American Society of Mechanical Engineers, New York, 1970) p. 253.

    Google Scholar 

  3. G. L. Dunlop, J. D. Reid and D.M.R. Taplin, Met. Trans. 2 (1971) 2308.

    Google Scholar 

  4. R. G. Fleck and D. M. R. Taplin, Can Met. Quart. 11 (1972) 299.

    Google Scholar 

  5. D. M. R. Taplin and S. Sagat, Mater. Sci. Eng. 9 (1972) 53.

    Google Scholar 

  6. S. Sagat, P. Blenkinsop and D. M. R. Taplin, J. Inst. Metals 100 (1972) 268.

    Google Scholar 

  7. R. D. Schelleng and G. H. Reynolds, Met. Trans. 4 (1973) 2199.

    Google Scholar 

  8. G. L. Dunlop, E. Shapiro, D. M. R. Taplin and J. Crane, ibid 4 (1973) 2039.

    Google Scholar 

  9. R. G. Fleck, C. J. Beevers and D. M. R. Taplin, J. Mater. Sci. 9 (1974) 1737.

    Google Scholar 

  10. T. Chandra, J. J. Jonas and D. M. R. Taplin, J. Australian Inst. Metals 20 (1975) 220.

    Google Scholar 

  11. R. G. Fleck, C. J. Beevers and D. M. R. Taplin, Met. Sci. 9 (1975) 49.

    Google Scholar 

  12. S. Sagat and D. M. R. Taplin, Acta Met. 24 (1976) 307.

    Google Scholar 

  13. N. Ridley, C. W. Humphries and D. Livesey, “Proceedings of the 4th International Conference on the Strength of Metals and Alloys” Vol. 1 (Laboratoire de Physique du Solide, E.N.S.M.I.M., Nancy, France, 1976) p. 433.

    Google Scholar 

  14. N. Ridley and C. W. Humphries, “Grain Boundaries” (The Institution of Metallurgists, London, 1976) p. E29.

    Google Scholar 

  15. N. Ridley and D. W. Livesey, “Fracture 1977,” Vol. 2, edited by D. M. R. Taplin (University of Waterloo Press, Waterloo, Ontario, 1977) p. 533.

    Google Scholar 

  16. C. W. Humphries and N. Ridley, J. Mater. Sci. 9 (1974) 1429.

    Google Scholar 

  17. C. I. Smith, B. Norgate and N. Ridley, Met. Sci. 10 (1976) 182.

    Google Scholar 

  18. C. I. Smith, B. Norgate and N. Ridley, Met. Sci. 10 (1976) 182.

    Google Scholar 

  19. M. J. Stewart, Met. Trans. A 7A (1976) 399.

    Google Scholar 

  20. D. M. R. Taplin and R. F. Smith, “Fracture 1977,” Vol. 2, edited by D. M. R. Taplin (University of Waterloo Press, Waterloo, Ontario, 1977) p. 541.

    Google Scholar 

  21. K. Matuki and M. Yamada, J. Japan Inst. Metals 37 (1973) 448.

    Google Scholar 

  22. M. W. A. Bright, D. M. R. Taplin and H. W. Kerr, J. Eng. Mater. Technol. 97 (1975) 1.

    Google Scholar 

  23. H. Ishikawa, D. G. Bhat, F. A. Mohamed and T. G. Langdon, Met. Trans. A 8A (1977) 523.

    Google Scholar 

  24. C. W. Humphries and N. Ridley, J. Mater. Sci. 12 (1977) 851.

    Google Scholar 

  25. R. G. Fleck, D. M. R. Taplin and C. J. Beevers, Acta Met. 23 (1975) 415.

    Google Scholar 

  26. R. G. Fleck, C. J. Beevers and D. M. R. Taplin, Met. Sci. 10 (1976) 413.

    Google Scholar 

  27. S. -A. Shei and T. G. Langdon, Acta Met. (in press).

  28. F. A. Mohamed and T. G. Langdon, ibid 23 (1975) 117.

    Google Scholar 

  29. Idem, Phil. Mag. 32 (1975) 697.

    Google Scholar 

  30. M. M. I. Ahmed and T. G. Langdon, Met. Trans. A 8A (1977) 1832.

    Google Scholar 

  31. H. Ishikawa, F. A. Mohamed and T. G. Langdon, Phil. Mag. 32 (1975) 1269.

    Google Scholar 

  32. F. A. Mohamed, M. M. I. Ahmed and T. G. Langdon, Met. Trans. A 8A (1977) 933.

    Google Scholar 

  33. T. G. Langdon and F. A. Mohamed, “Fracture 1977,” Vol. 2, edited by D. M. R. Taplin (University of Waterloo Press, Waterloo, Ontario, 1977) p. 525.

    Google Scholar 

  34. G. L. Dunlop and D. M. R. Taplin, J. Mater. Sci. 7 (1972) 84.

    Google Scholar 

  35. J. W. Hancock, Met. Sci. 10 (1976) 319.

    Google Scholar 

Download references

Author information

Author notes

  1. Shen -Ann Shei

    Present address: Metallurgy and Ceramics Division, Ames Laboratory, Iowa State University, 50010, Ames, Iowa, USA

Authors and Affiliations

  1. Department of Materials Science, University of Southern California, 90007, Los Angeles, California, USA

    Shen -Ann Shei & Terence G. Langdon

Authors
  1. Shen -Ann Shei
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Terence G. Langdon
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Shei, S.A., Langdon, T.G. The fracture characteristics of a superplastic single phase copper alloy. J Mater Sci 13, 1084–1092 (1978). https://doi.org/10.1007/BF00544704

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00544704

Keywords

Search

Navigation