Authors : Hanene Bensouyad and Djamel Hamana
Abstract: The kinetics of transformation (precipitation and dissolution of the precipitates) is always allied to the concepts of energies activation and about the order of reaction. The interest of this study is justified by the existence of a significant number of methods of isoconversionnelle analysis, more or less sophisticated like that of Kissinger-Akahira-Sunose (KAS), Ozawa-Flyn-Wall (OFW) and that of Boswell, which makes difficult the choice of a method particular. The goal of the use of these models of analysis would be to find a description proportioned of the development of the reaction according to time and temperature. In this research, we have interested by the influence of the heating rates on the non isothermal transformations in Al-12% Mg. For this the samples of this alloys have heated with different rates (V = 0.5, 1, 2, 3, 4, 5, 6, 7�C min 1) from room temperature until 530�C using the differential scanning calorimetry (DSC) and we will calculate the energy activation of the precipitated phases and ` by various isoconversionelles methods.
Hanene Bensouyad and Djamel Hamana , 2008. Analysis Methods for the Determination of Energies Activation and the Study of the Precipitation Reactions in Al-12% Weight Mg Alloys. Research Journal of Applied Sciences, 3: 434-437.