DSC study of the kinetic parameters of the metastable phases formation during non-isothermal annealing of an Al–Si–Mg alloy

被引：0
作者：
Mourad Ibrahim Daoudi
Abdelhafid Triki
Abdelkrim Redjaimia
机构：
[1] University of Guelma Algeria and LM2S Laboratory,Physics Department
[2] University of Annaba and LM2S Laboratory,Physics Department
[3] Institut Jean Lamour,undefined
[4] Ecole des Mines de Nancy,undefined
来源：
Journal of Thermal Analysis and Calorimetry | 2011年 / 104卷
关键词：
Al–Si–Mg alloy; DSC; Kinetic parameters; Isoconversional methods;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Kinetics of β″ and β′ precipitations in an AlSiMg have been studied under non-isothermal conditions using differential scanning calorimetry (DSC) technique. The variation of the activation energy as a function of transformed fraction is determined using two isoconversional methods of Kissinger–Akahira–Sunose (KAS) and Friedman. The results obtained using the two methods show a change in the activation energy for both metastable phases precipitations as a function of transformed fraction. The results obtained from KAS method as compared with those obtained from Friedman method, show some major disagreements between the two methods. The growth exponent, determined by Ozawa method, decreases as a function of temperature for both phases.
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页码：627 / 633
页数：6
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