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

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Abstract

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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Authors and Affiliations

  1. Physics Department, University of Guelma Algeria and LM2S Laboratory, Annaba, Algeria

    Mourad Ibrahim Daoudi

  2. Physics Department, University of Annaba and LM2S Laboratory, Annaba, Algeria

    Abdelhafid Triki

  3. Institut Jean Lamour, Ecole des Mines de Nancy, Parc de Saurupt, CS 14 234, 54042, Nancy cedex, France

    Abdelkrim Redjaimia

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  1. Mourad Ibrahim Daoudi
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  2. Abdelhafid Triki
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  3. Abdelkrim Redjaimia
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Correspondence to Mourad Ibrahim Daoudi.

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Daoudi, M.I., Triki, A. & Redjaimia, A. DSC study of the kinetic parameters of the metastable phases formation during non-isothermal annealing of an Al–Si–Mg alloy. J Therm Anal Calorim 104, 627–633 (2011). https://doi.org/10.1007/s10973-010-1099-8

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  • DOI: https://doi.org/10.1007/s10973-010-1099-8

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