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Evolution of intermetallic phases in multicomponent Al-Si foundry alloys containing different Cu, Mg and Fe content

Javidani Mousa, Larouche Daniel et Chen X-Grant. (2014). Evolution of intermetallic phases in multicomponent Al-Si foundry alloys containing different Cu, Mg and Fe content. Dans : 118th, One Hundred Eighteenth Annual Metalcasting Congress , April 8-11, 2014, Schaumburg, IL.

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Résumé

In this paper, the influence of Cu, Mg and Fe content on the microstructure evolution of Al-Si based alloys has been studied. Initially, the as-cast microstructure of four Al-Si alloys containing different Cu, Mg and Fe content was studied using differential scanning calorimetry (DSC), optical and electron microscopy. Subsequently, the effect of different solution treatments on the microstructure evolution of the alloys was evaluated. The microstructure evolutions after solution treatment were verified by thermodynamic calculations. The results demonstrated that the dissolution of Q-Al5Cu2Mg8Si6 phase was strongly dependent on Cu and Mg content. That is, in 356 Al alloys containing low Cu content (e.g. 1.5%), the DSC peak corresponding to Q-phase disappeared after a solution treatment of 5 hours at 502 °C (935.6 °F). However, in the alloys containing high Cu content (e.g., 3.4%), the peak was still remaining even after 20 hours of solution treatment. In addition, the study also illustrated that in 356 Al alloys containing high Cu and Fe content, longer solution treatment led the dissolved Cu to be gradually lost to the N-Al7Cu2Fe phase.

Type de document:Matériel de conférence (Non spécifié)
Date:2014
Lieu de publication:Schaumburg, Illinois
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
Liens connexes:
Mots-clés:Al alloy, microstructure, calorimetry, foundry, electron microscopy, intermetallic compound, thermodynamics, calculation, copper addition, magnesium addition, iron addition, alliage d'aluminium, calorimétrie, fonderie, microscopie électronique, composé intermétallique, thermodynamique, calcul, addition de cuivre, addition de magnésium, addition de fer
Déposé le:02 mars 2021 20:57
Dernière modification:02 mars 2021 20:57
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