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Differential scanning calorimetry analyses of Al-Cu-Zn alloys

Published online by Cambridge University Press:  01 October 2012

H. Bedboudi ,
S. Boulkhessaim ,
A. Bourbia ,
M. Draissia  and
M.Y. Debili
H. Bedboudi
Affiliation:
LM2S, Physics Department, Faculty of Science, Badji-Mokhtar University, PB 12, Annaba 23000, Algeria
S. Boulkhessaim
Affiliation:
LM2S, Physics Department, Faculty of Science, Badji-Mokhtar University, PB 12, Annaba 23000, Algeria
A. Bourbia
Affiliation:
LM2S, Physics Department, Faculty of Science, Badji-Mokhtar University, PB 12, Annaba 23000, Algeria
M. Draissia*
Affiliation:
LM2S, Physics Department, Faculty of Science, Badji-Mokhtar University, PB 12, Annaba 23000, Algeria
M.Y. Debili
Affiliation:
LM2S, Physics Department, Faculty of Science, Badji-Mokhtar University, PB 12, Annaba 23000, Algeria
*
ae-mail: [email protected]
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Abstract

The effect of heat treatment on phase transformation and crystalline microstructure properties of ternary Al-Cu-Zn alloys made under nonequilibrium conditions was investigated by means of differential scanning calorimetry spectrometry (DSC), optical microscopy observations and X-ray diffraction (XRD) patterns analyses. A set of ternary Al-X wt.% Cu-X wt.%Zn alloys with nominal compositions X = 2, 8, 20 and 25 were rapidly solidified under vacuum by high-frequency magnetic induction melting process. It was found that DSC heating at temperatures below 500 °C leads to phase transformation with the development of new phases which were identified by XRD patterns analyses such as the presence at ambient temperature of the rhomboedric structure τ′-Al4Cu3Zn phase in equilibrium with the expected tetragonal θ-CuAl2 in Al matrix. Measured DSC crystallization enthalpies of occurring phase transformation were given. Optical microscopy observations reveal refined grains and homogeneous surface textures of the as-melted Al-Cu-Zn alloys.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 59 , Issue 3 , September 2012 , 30701
Copyright
© EDP Sciences, 2012

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References

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