Structure and texture of the Al3CaZn phase in an Al-5 % Ca-5 % Zn superplastic sheet alloy

Authors

  • M. T. Pérez-Pardo Centro Nacional de Investigaciones Metalúrgicas, CENIM (CSIC)
  • J. Ibáñez Centro Nacional de Investigaciones Metalúrgicas, CENIM (CSIC)
  • M. Morris Institute of Structural Metallurgy, University of Neuchatêl
  • M. C. Cristina Centro Nacional de Investigaciones Metalúrgicas, CENIM (CSIC)
  • O. A. Ruano Centro Nacional de Investigaciones Metalúrgicas, CENIM (CSIC)
  • G. González-Doncel Centro Nacional de Investigaciones Metalúrgicas, CENIM (CSIC)

DOI:

https://doi.org/10.3989/revmetalm.1998.v34.iExtra.763

Keywords:

Texture, Superplasticity, Aluminium, Intermetallics, Crystallography

Abstract


The structure of the intermetallic phase Al3CaZn present in the superplastic sheet alloy Al-5 % Ca-5 % Zn has been determined by means of x-ray diffraction (XRD) and electrón diffraction (TEM). Also, the texture of this phase has been studied by means of pole figures and the orientation distribution function (ODF). The Al-5 % Ca-5 % Zn alloy is formed by a fine grained aluminum matrix (d ≈ 2-3 μm) and 20 % vol. of Al3CaZn in the form of round-shaped particles with 0.2-0.5 μm diameter. This alloy undergoes superplastic behavior in a wide range of strain rates and temperatures. It has been found in this work that the structure of the second phase is body-centered tetragonal, with lattice parameters a = b = 0.422 nm and c = 1.131 nm. The texture of the alloy is formed by the fiber <001>, i.e., the crystallites are oriented preferentially with the c-axis perpendicular to the rolling plane. The texture sharpens after severe annealings.

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Published

1998-05-30

How to Cite

Pérez-Pardo, M. T., Ibáñez, J., Morris, M., Cristina, M. C., Ruano, O. A., & González-Doncel, G. (1998). Structure and texture of the Al3CaZn phase in an Al-5 % Ca-5 % Zn superplastic sheet alloy. Revista De Metalurgia, 34(Extra), 324–328. https://doi.org/10.3989/revmetalm.1998.v34.iExtra.763

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