Recrystallization and grain growth activation energies in a hybrid magnesium material fabricated by high-pressure torsion
Recrystallization and grain growth activation energies in a hybrid magnesium material fabricated by high-pressure torsion
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.
activation energy, grain growth, high-pressure torsion, magnesium, recrystallization
Azzeddine, Hiba
a9bb5955-be91-4ce8-971c-60ab5573a1a9
Avettand-Fènoël, Marie-Noëlle
3fbad585-0cd1-4178-9eac-dca6fa00b185
Bazarnik, Piotr
844b4a15-226a-4275-9cee-812669fa033c
Baudin, Thierry
4af2b6a9-ef09-4ef5-b2e3-cffa1534abc7
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Azzeddine, Hiba
a9bb5955-be91-4ce8-971c-60ab5573a1a9
Avettand-Fènoël, Marie-Noëlle
3fbad585-0cd1-4178-9eac-dca6fa00b185
Bazarnik, Piotr
844b4a15-226a-4275-9cee-812669fa033c
Baudin, Thierry
4af2b6a9-ef09-4ef5-b2e3-cffa1534abc7
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Azzeddine, Hiba, Avettand-Fènoël, Marie-Noëlle, Bazarnik, Piotr, Baudin, Thierry, Huang, Yi and Langdon, Terence G.
(2024)
Recrystallization and grain growth activation energies in a hybrid magnesium material fabricated by high-pressure torsion.
Thermochimica Acta.
(In Press)
Abstract
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.
Text
Azzeddine et al_revised
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Restricted to Repository staff only until 18 June 2026.
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Accepted/In Press date: 18 June 2024
Keywords:
activation energy, grain growth, high-pressure torsion, magnesium, recrystallization
Identifiers
Local EPrints ID: 491733
URI: http://eprints.soton.ac.uk/id/eprint/491733
ISSN: 0040-6031
PURE UUID: 4cbab320-4d4e-43c6-a21c-355a058f95f8
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Date deposited: 03 Jul 2024 16:56
Last modified: 12 Jul 2024 01:48
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Contributors
Author:
Hiba Azzeddine
Author:
Marie-Noëlle Avettand-Fènoël
Author:
Piotr Bazarnik
Author:
Thierry Baudin
Author:
Yi Huang
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