Journal of Materials Science

, Volume 24, Issue 12, pp 4246–4252 | Cite as

The microstructure of extruded Fe-Al

  • P. R. Munroe
  • I. Baker
Papers

Abstract

Five FeAl alloys, whose compositions span the range 34 to 51 at. % Al, were extruded at 1273 K, re-extruded at 1023 K and their deformation structures examined by transmission electron microscopy. The incidence of <1 1 1> slip, compared with <001> slip, was found to increase as Fe-Al became more iron-rich, confirming previous results, in a similar study: some of the <1 1 1> dislocations were found to be present in the form of dipoles. In the most aluminium-rich alloy square <0 0 1> prismatic dislocation loops, planar defects and FeAl2 particles were observed.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Y. Umakoshi and M. Yamagauchi, Phil. Mag. A 44 (1980) 711.Google Scholar
  2. 2.
    M. G. Mendiratta, H.-M. Kim and H. A. Lip-Sitt, Metall. Trans. 15A (1984) 395.Google Scholar
  3. 3.
    I. Baker and D. J. Gaydosh, Mater. Sci. Eng. 96 (1987) 147.Google Scholar
  4. 4.
    D. Weber, M. Meutain, D. Paris, A. Fordeux and P. Lesbats, J. Physique 38 (1977) 7.Google Scholar
  5. 5.
    B. Schmidt, P. Nagpal and I. Baker, Proceedings MRS, 131 (1989) 755.Google Scholar
  6. 6.
    I. Baker and D. J. Gaydosh, Phys. Status Solidi. 96 (1986) 185.Google Scholar
  7. 7.
    D. I. Potter, Mater. Sci. Eng. 5 (1970) 201.Google Scholar
  8. 8.
    P. B. Hirsch, A. Howie, R. B. Nicholson, D. W. Pashley and M. J. Whelan, in “Electron Microscopy of Thin Crystals”, (Krieger, Malabar, Florida, 1977) p. 178.Google Scholar
  9. 9.
    D. L. Yaney, A. R. Pelton and W. D. Nix, J. Mater. Sci. 21 (1986) 2083.Google Scholar
  10. 10.
    G. Thomas and M. J. Goringe, in “Transmission Electron Microscopy of Materials”, (Wiley, New York, 1979), p. 157.Google Scholar
  11. 11.
    I. L. Ray, R. C. Crawford and D. J. H. Cockayne, Phil. Mag. 21 (1970) 1027.Google Scholar
  12. 12.
    J. P. Hirth and J. Lothe, in “Theory of Dislocations” (Wiley, New York, 1982), p. 86.Google Scholar
  13. 13.
    M. Crimp and I. Baker, unpublished research.Google Scholar
  14. 14.
    A. Ball and R. E. Smallman, Acta Metall. 14 (1966) 1517.Google Scholar
  15. 15.
    T. C. Tisone, G. W. Marshall and J. O. Brittain, J. App. Phys. 39 (1968) 3714.Google Scholar
  16. 16.
    G. W. Marshall and J. O. Brittain, Metall. Trans. 6A (1975) 921.Google Scholar
  17. 17.
    Idem., ibid. 7A (1976) 101.Google Scholar
  18. 18.
    S. V. Rinnovatore and N. Brown, Trans. AIME 239 (1967) 225.Google Scholar
  19. 19.
    S. G. Cupchalk and N. Brown, Acta Metall. 15 (1967) 847.Google Scholar
  20. 20.
    A. Ball, Phil. Mag. 20 (1969) 113.Google Scholar

Copyright information

© Chapman and Hall Ltd 1989

Authors and Affiliations

  • P. R. Munroe
    • 1
  • I. Baker
    • 1
  1. 1.Thayer School of EngineeringDartmouth CollegeHanoverUSA

Personalised recommendations