Metallurgical and Materials Transactions A

, Volume 40, Issue 2, pp 278–281 | Cite as

Superplastic Behavior of a High-Strength Al-Zn-Mg-Cu-Zr Alloy

  • A. Kumar
  • A.K. MukhopadhyayEmail author
  • K.S. Prasad


The present study examines the superplastic potential of Al-Zn-Mg-Cu-Zr alloy AA 7449. It is demonstrated that the use of a suitable thermomechanical process (TMP) prior to superplastic deformation, together with the use of appropriate combinations of strain rate and temperature during the tensile test, enabled development of grain structures amenable (having an average grain size of <10 μm) to superplastic deformation in this alloy. This yielded as high as 460 pct elongation.


Transmission Electron Micrograph Subgrain Boundary Static Recrystallization Al3Zr Superplastic Deformation 
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The authors acknowledge the financial support by the Defence Research and Development Organisation (DRDO), Government of India.


  1. 1.
    J. Pilling, N. Ridley: Superplasticity in Crystalline Solids, The Institute of Metals, London, 1989Google Scholar
  2. 2.
    O.A. Kaibyshev: Superplasticity of Alloys, Intermetallics and Ceramics, Springer-Verlag, Berlin, 1992Google Scholar
  3. 3.
    T.G. Nieh, J. Wadsworth, O.D. Sherby: Superplasticity in Metals and Ceramics, Cambridge University Press, Cambridge, MA, 1997Google Scholar
  4. 4.
    T.H. Courtney: Mechanical Behaviour of Materials, McGraw-Hill Publishing Company, New York, NY, 1990, pp. 295–309Google Scholar
  5. 5.
    J.A. Wert, N.E. Paton, C.H. Hamilton, M.W. Mahoney: Metall. Trans. A, 1981, vol. 12A, pp. 1267–76ADSGoogle Scholar
  6. 6.
    B.M. Watts, M.J. Stowell, B.L. Baikie, D.G.E. Owen: Met. Sci., 1976, vol. 6, pp. 189–97Google Scholar
  7. 7.
    T.G. Nieh, L.M. Hsiung, J. Wadsworth, R. Kaibyshev: Acta Mater., 1998, vol. 46, pp. 2789–800CrossRefGoogle Scholar
  8. 8.
    T. Sakai, X. Yang, H. Miur: Mater. Sci. Eng. A, 1997, vols. 234–236, pp. 857–60Google Scholar
  9. 9.
    K.R. Brown: U.S. Patent No. 5,772,804, 1998Google Scholar

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2008

Authors and Affiliations

  1. 1.Defence Metallurgical Research LaboratoryHyderabadIndia

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