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Enhanced elevated-temperature properties via Mo addition in Al-Mn-Mg 3004 alloy

Liu Kun, Ma Hezhaoye et Chen X-Grant. (2017). Enhanced elevated-temperature properties via Mo addition in Al-Mn-Mg 3004 alloy. Journal of alloys and compounds, 694, p. 354-365.

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URL officielle: http://dx.doi.org/10.1016/j.jallcom.2016.10.005

Résumé

The present work investigates the influence of adding Mo to an Al-Mn-Mg 3004 alloy on elevated-temperature properties as well as their thermal stability during long-term thermal holding at 350°C and 400°C. In as-cast and heat-treated conditions, both microhardness and yield strength increase with increasing Mo contents and reach peak values at 0.3 wt. % followed by a plateau. With an optimized Mo content (0.3 wt. %), the volume fraction of dispersoids is increased while the volume percentage of the dispersoid-free zone is greatly reduced compared to the base alloy free of Mo, resulting in the remarkable increases in elevated-temperature strength and creep resistance. The results of the long-term thermal holding show that compared with the rapid drop of elevated-temperature strength and creep resistance in the base alloy, the Al-Mn-Mg alloy with 0.3% Mo is thermally stable up to 350°C, exhibiting a slight decrease of stability at 400°C. The combination of high elevated-temperature properties and their excellent thermal stability at 350-400°C with Mo addition makes Al-Mn-Mg 3xxx alloys the promising candidates for elevated-temperature applications.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:694
Pages:p. 354-365
Version évaluée par les pairs:Oui
Date:15 Février 2017
Sujets:Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées
Mots-clés:Al-Mn-Mg 3004 alloy, Mo, Elevated-temperature properties, thermal stability, creep resistance
Déposé le:09 nov. 2016 01:49
Dernière modification:09 nov. 2016 01:49
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