Effect of Mg contents on the mechanical proprieties and precipitation kinetics in Al–3.3 wt.% Cu alloy

  • Messaoud Fatmi Research Unit on Emerging Materials (RUEM), University Ferhat Abbas of Setif 1, 19000
  • A. Ouali Department of Physics, Faculty of Sciences, University of Mohamed Boudiaf, M'sila, 28000
  • Amar Djemli Department of Physics, Faculty of Sciences, University of Mohamed Boudiaf, M'sila, 28000
  • Tayeb Chihi Research Unit on Emerging Materials (RUEM), University Ferhat Abbas of Setif 1, 19000
  • M A Ghebouli Department of Chemistry, Faculty of Technology, University of Mohamed Boudiaf, M'sila, 28000
  • Foudil Sahnoune Research Unit on Emerging Materials (RUEM), University of Setif 1, 19000
  • B Ghebouli Laboratory of Studies of Surfaces and Interfaces of Solid Materials, University Ferhat Abbas of Setif 1, 19000
  • B Barka Laboratory of growth and characterization of new semiconductors, Faculty of Technonology, University of Ferhat Abbas, Setif 01, 19000
Keywords: Al-Cu-Mg alloys, Discontinuous Precipitation, Activation energy, DSC

Abstract

The effect of additional Mg on the microstructure, mechanical properties, and transformation kinetics during aging in Al–3.3 wt.% Cu alloy was studied. The compositions and microstructure were examined by X-ray diffraction, Differential scanning calorimetry (DSC) and scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDS). The results show that the Mg in the Al–Cu alloy mainly precipitated to the grain boundaries during the process of transformation and formed a ternary Al2CuMg metallic compound and the rate of discontinuous precipitation reaction decreases with increasing concentration of Mg. The activation energy of crystallization was evaluated by applying the Kissinger equation.

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Published
2018-01-09
Section
Research