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Effects of Mn content on recrystallization resistance of AA6082 aluminum alloys during post-deformation annealing

Qian Xiaoming, Parson Nick et Chen X-Grant. (2020). Effects of Mn content on recrystallization resistance of AA6082 aluminum alloys during post-deformation annealing. Journal of Materials Science & Technology, 52, p. 189-197.

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URL officielle: http://dx.doi.org/doi:10.1016/j.jmst.2020.04.015

Résumé

The microstructural evolutions under as-homogenized and as-deformed conditions and after the post-deformation annealing of AA6082 aluminum alloys with different Mn content (0.05 wt.%-1 wt.%) were studied by optical, scanning electron, and transmission electron microscopies. The results showed that the presence of a large amount of α-Al(Mn,Fe)Si dispersoids induced by Mn addition significantly improved the recrystallization resistance. In the base alloy free of Mn, static recrystallization occurred after 2 h of annealing, and grain growth commenced after 4 h of annealing, whereas in Mn-containing alloys, the recovered grain structure was well-retained after even 8 h of annealing. The alloy with 0.5% Mn exhibited the best recrystallization resistance, and a further increase of the Mn levels to 1% resulted in a gradual reduction of the recrystallization resistance, the reason for which was that recrystallization occurred only in the dispersoid-free zones (DFZs) and the increased DFZ fraction with Mn content led to an increase in the recrystallization fraction. The variation in the dispersoid number density and a coarsening of dispersoids during annealing have a limited influence on the static recrystallization in Mn-containing alloys.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:52
Pages:p. 189-197
Version évaluée par les pairs:Oui
Date:1 Septembre 2020
Sujets:Sciences naturelles et génie > Génie
Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Sciences naturelles et génie > Sciences appliquées
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Mots-clés:AA6082 alloys, Mn effects, recrystallization resistance, dispersoid precipitation, post-deformation annealing, alliages AA6082, effets Mn, résistance à la recristallisation, précipitation dispersoïde, recuit post-déformation
Déposé le:02 sept. 2020 01:42
Dernière modification:02 sept. 2020 01:42
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