Advertisement

Journal of Materials Science

, Volume 27, Issue 16, pp 4447–4459 | Cite as

Processing-microstructure relationships in compocast magnesium/SiC

  • V. Laurent
  • P. Jarry
  • G. Regazzoni
  • D. Apelian
Papers

Abstract

Compocasting experiments were conducted to investigate the feasibility of the process as applied to the AZ91 D magnesium alloy-SiC particles system. Processing-macro/ microstructure relationships were examined. Three temperature-time processing sequences were investigated: stirring temperature maintained above liquidus; stirring temperature in the semi-solid temperature range; and lastly, an imposed temperature rise above the liquidus after stirring in the mushy zone. Stirring temperature and particle size significantly affect spatial particle distribution and porosity level. The easy incorporation and even dispersion of particles in the matrix suggest good wetting of SiC particles by the magnesium matrix. Impact fracture surfaces show strong bonding at the particle/matrix interface. A reaction takes place at the matrix/particle interface whilst stirring at temperatures above the liquidus. Reaction products have been identified. Finally, the mechanical properties of a compocast ingot which was extruded have been studied and are reported. This work clearly points out that there is a preferred procedure to follow during compocasting to obtain an optimum microstructure. The procedure is to add the reinforcing materials to the semi-solid alloy followed by stirring above the liquidus temperature.

Keywords

Liquidus Temperature Particle System Processing Sequence Mushy Zone Strong Bonding 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    D. E. Hammond, Modern Casting August (1989) 29.Google Scholar
  2. 2.
    D. M. Schuster, M. D. Skibo and W. R. Hoover, Light Metal Age February (1989) 15.Google Scholar
  3. 3.
    P. Rohatgi, Modern Casting April (1988) 47.Google Scholar
  4. 4.
    R. Mehrabian, R. G. Riek and M. C. Flemings, Metall. Trans. 5A (1974) 1899.CrossRefGoogle Scholar
  5. 5.
    C. G. Levi, C. J. Abbaschian and R. Mehrabian, ibid. 9A (1978) 697.CrossRefGoogle Scholar
  6. 6.
    P. K. Ghosh, S. Ray and P. K. Rohatgi, Trans. J. Inst. Metals 25 (1984) 440.CrossRefGoogle Scholar
  7. 7.
    M. D. Skibo and D. M. Schuster (Dural aluminium composites corporation). US Pat. C22C21/00, 1/09, 5 November 1987.Google Scholar
  8. 8.
    A. Tissier, D. Apelian and G. Regazzoni, J. Mater. Sci. 25 (1990) 1184.CrossRefGoogle Scholar
  9. 9.
    F. C. Bennett, T. E. Leontis and S. L. Couling, in “Proceedings of the 34th Meeting of the International Magnesium Association” (International Magnesium Association, Ohio, 1977) p. 23.Google Scholar
  10. 10.
    K. Suganuma, T. Okamoto, T. Hayami, Y. Oku and N. Suzuki, J. Mater. Sci. 23 (1988) 1317.CrossRefGoogle Scholar
  11. 11.
    J. E. Hack, R. A. Page and R. Sherman, Metall. Trans. 16A (1985) 2069.CrossRefGoogle Scholar
  12. 12.
    Ernest Sung Chor Chin, Report No. AD-A179 912, US Army Materials Technology Laboratory, January 1987.Google Scholar
  13. 13.
    R. Warren and C. H. Andersson, Composites 15 (2) (1984) 106.CrossRefGoogle Scholar
  14. 14.
    J. W. McCoy, C. Jones and F. E. Wawner, SAMPE Q. January (1988) 37.Google Scholar
  15. 15.
    F. M. Hosking, Report no. DE81028185, Sandia National Laboratories, July 1981.Google Scholar
  16. 16.
    F. A. Girot, L. Albringe, J. M. Quenisset and R. Naslain, J. Metals November (1987) 18.Google Scholar
  17. 17.
    S. Das, R. Asthana and P. K. Rohatgi, Int. Met. Rev. 31 (1986) 115.Google Scholar
  18. 18.
    T. Z. Kattamis and J. A. Cornie, in “Proceedings of 1988 World Materials Congress”, edited by S. C. Fishman and A. K. Dhingra (ASM International, Chicago, 1988) p. 47.Google Scholar
  19. 19.
    W. R. Loue and W. H. Kool, ibid.“ p. 327.Google Scholar
  20. 20.
    M. A. Bayoumi and M. Suery, ibid.“ p. 167.Google Scholar
  21. 21.
    B. A. Mikucki, S. O. Shook, W. E. Mercer and W. G. Green, in “Proceedings of 43rd Annual World Magnesium Conference”, Los Angeles, 1986 (International Magnesium Association, Virginia, 1986) p. 13.Google Scholar
  22. 22.
    D. L. Albright, ibid. p. 33.Google Scholar
  23. 23.
    A. Mortensen, J. A. Cornie and M. C. Flemings, J. Metals 40 (1988) 12.Google Scholar
  24. 24.
    S. Ray, in “Proceedings of 1988 World Materials Congress” edited by S. C. Fishman and A. K. Dhingra (ASM International, Chicago, 1988) p. 77.Google Scholar
  25. 25.
    K. Yamada, S. Sekiguchi and T. Matsumiya, in “Proceedings of 34th International SAMPE Symposium and Exhibition”, Nevada 1989 (SAMPE, California, 1989).Google Scholar
  26. 26.
    W. P. Jensen, S. M. and R. T. Talton Jr, in “Proceedings of Symposium Series no. 10 AI.Che.E-I.Chem.E.”, London 1965 (American Institute of Chemical Engineers, New York, 1965) p. 82.Google Scholar
  27. 27.
    E. M. Klier, MS Thesis, Massachussets Institute of Technology (1988).Google Scholar
  28. 28.
    D. B. Spencer, R. Mehrabian and M. C. Flemings, Met. Trans. 3A (1973) 1925.Google Scholar
  29. 29.
    F. A. Girot, L. Albringe, J. M. Quenisset and R. Naslain, J. Metals November (1987) 18.Google Scholar
  30. 30.
    S. Nagata, “Mixing principles and applications” (Wiley, New York, 1975).Google Scholar
  31. 31.
    Ju. V. Naidich, Progr. Surf. Membrane Sci. 14 (1981) 353.CrossRefGoogle Scholar
  32. 32.
    G. R. Geiger and D. R. Doirier, “Transport Phenomena in Metallurgy” (Addison-Wesley, Mass. 1973).Google Scholar
  33. 33.
    F. D. Rumscheidt and S. G. Mason, J. Colloid Sci. 16 (1961) 238.CrossRefGoogle Scholar
  34. 34.
    R. Clift, J. R. Grace and M. E. Weber, “Bubbles, Drops and Particles” (Academic Press, New York, 1978).Google Scholar
  35. 35.
    H. J. Karam and J. C. Bellinger, Ind. Eng. Chem. Fundamentals 7 (1968) 576.CrossRefGoogle Scholar
  36. 36.
    ASM International Handbook Committee (eds) “Metals Handbook”, 9th Edn, Vol. 15 (ASM Int., Ohio, 1988) p. 840.Google Scholar

Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • V. Laurent
    • 1
  • P. Jarry
    • 1
  • G. Regazzoni
    • 1
  • D. Apelian
    • 2
  1. 1.Péchiney, Centre de Recherches de VoreppeFrance
  2. 2.College of EngineeringWorcester Polytechnic InstituteWorcesterUSA

Personalised recommendations