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

作者：Daoudi Mourad Ibrahim^*; Triki Abdelhafid; Redjaimia Abdelkrim

来源：Journal of Thermal Analysis and Calorimetry, 2011, 104(2): 627-633.

DOI：10.1007/s10973-010-1099-8

• Al-Si-Mg alloy
• DSC
• Kinetic parameters
• Isoconversional methods

Kinetics of beta aEuro(3) and beta' 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.

• 出版日期2011-5