Annealing Study of Al-Mg Wrought Alloys Using Two Different Techniques and Estimation of the Activation Enthalpy of Migrating Defects

Abstract:

The electrical resistivity and the corresponding mechanical properties (hardness) of some 5xxx Al-Mg alloy processed by plastic deformation were investigated. Plastic deformation was performed at room temperature. Isothermal annealing produced a significant change in both the electrical and mechanical properties of the samples. As the annealing time was increased, the resistivity and hardness up to full recovery. The activation enthalpy of migration of defects was determined, was found to be 0.234±0.06 eV, 0.218±0.049 eV, 0.316±0.016 eV 0.232±0.012 eV for 5005, 5251, 5052 and 5754 alloys, respectively.

• Periodical: Defect and Diffusion Forum (Volumes 337-338)
• Pages: 29-37
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.337-338.29
• Online since: April 2013
• Authors: Ahmed G. Attallah, M.A. Abdel-Rahman, M. El-Sayed, A.A. Ibhraim, S.A. Aly, Emad A. Badawi
• Keywords: Activation Enthalpy of Migration, Al-Mg Wrought Alloys, Electrical Resistivity, Hardness, Isothermal Annealing

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