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Verhandlungen pp 607-610 | Cite as

An electron microscopic study of the age hardening of duralumin

  • K. S. Grewal
  • D. L. Bhattacharya

Abstract

Precipitation in duralumin-type Al-Cu-Mg alloys is more complex than that in binary Al-Cu alloys. According to Brommelle and Phillips (1), the principal constituents present in equilibrium in these alloys are: (1) the aluminium-rich solid solution a; (2) the phase Al2CuMg (S phase); and (3) the phase CuAl2 (θ-phase). The relative amounts of S and θ depend upon the copper to magnesium weight ratio in the alloy, the equilibrium ratio being equal to 2.6. If the ratio is less than 2.6 in the alloy, then the phases present in equilibrium will be only the solid solution a and S, on annealing near the solidus temperature.

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References

  1. 1.
    Brommelle, N. S., and H. W. L. Phillips J Inst. Metals, London 82, 239 (1953).Google Scholar
  2. 2.
    Sperry, P. R.: Trans. A.S.M. 48, 904 (1956).Google Scholar
  3. 3.
    Keller, F.: Physical Metallurgy of aluminium alloys. A.S.M., 1949, p. 111.Google Scholar
  4. 4.
    Hardy, H. K., and T. J. Heal: Progress in metal physics, Vol. 5. London: Pergamon Press 1954, p. 214.Google Scholar
  5. 5.
    Hunter, M. S., and D. L. RoBINSoN: J. Metals 5, 717 (1953).Google Scholar
  6. 6.
    Bhattacharya, D. L., and K. S. Grewal: Trans. Indian Inst. Metals T. P. 152, 149 (1956).Google Scholar
  7. 7.
    Mahl, H., and I. N. Stranski: Z. physik. Chem. 52, 257 (1942).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1960

Authors and Affiliations

  • K. S. Grewal
    • 1
  • D. L. Bhattacharya
    • 1
  1. 1.Department of MetallurgyIndian Institute of ScienceBangaloreIndia

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