Recrystallization and grain growth activation energies in a hybrid magnesium material fabricated by high-pressure torsion - Université de Lille
Article Dans Une Revue Thermochimica Acta Année : 2024

Recrystallization and grain growth activation energies in a hybrid magnesium material fabricated by high-pressure torsion

Résumé

The recrystallization and grain growth activation energies of the hybrid AZ31/Mg-0.6Gd (wt.%) alloy were calculated using differential scanning calorimetry analyses and scanning electron microscopy, respectively, after fabricating by high-pressure torsion up to 20 turns and then subjecting to an isochronal annealing treatment from 423 to 723 K for 1 h. The DSC results show one exothermic peak belonging to the static recrystallization of the AZ31 region with an activation energy of 112 ± 10 kJ/mol. The grain growth kinetics for the AZ31 and Mg-0.6Gd regions were described by the Arrhenius equation. The calculation with a grain growth exponent equal to 4 gave values for the activation energies in both the AZ31 (146.2 ± 8.4 kJ/mol) and Mg-0.6Gd (90.9 ± 13.5 kJ/mol) regions. The present results reveal the heterogeneity of the thermal stability of the AZ31/Mg-0.6Gd hybrid material.
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Dates et versions

hal-04622262 , version 1 (24-06-2024)

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Hiba Azzeddine, Marie-Noëlle Avettand-Fènoël, Piotr Bazarnik, Thierry Baudin, Yi Huang, et al.. Recrystallization and grain growth activation energies in a hybrid magnesium material fabricated by high-pressure torsion. Thermochimica Acta, 2024, Thermochimica Acta, pp.179805. ⟨10.1016/j.tca.2024.179805⟩. ⟨hal-04622262⟩
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