LiveZilla Live Chat Software

Constellation, le dépôt institutionnel de l'Université du Québec à Chicoutimi

Mechanical properties of aluminium-copper B206 alloys with iron and silicon additions

Kamga H. K., Larouche D., Bournane M. et Rahem Ahmed. (2012). Mechanical properties of aluminium-copper B206 alloys with iron and silicon additions. International Journal of Cast Metals Research, 25, (1), p. 15-25.

[img] PDF
Administrateurs seulement

435kB

Résumé

Mechanical properties of B206 aluminium alloys with additions of iron and silicon were studied to investigate the combined effect of these additions on tensile strengths and ductility. Properties are highly influenced by the iron to silicon ratio and the nominal concentration of the single elements. The best properties were obtained with both a ratio close to one and low concentrations of iron and silicon. Present experimental results show that it is possible to multiply by two or three the present limit of 0·1 wt-%Fe in these alloys at natural aging (T4) and still obtain the minimum of 7% elongation required by the automotive industry. At artificial aging (T7), it will be very difficult however to reach the 7% elongation with ~0·2 wt-%Fe and 0·2 wt-%Si, while this seems impossible with ~0·3 wt-%Fe and 0·3 wt-%Si. It was found that macrosegregation of Cu in the gage section of the ASTM B108 test bars is responsible for an enrichment of 0·8-0·9 wt-%of this element in the test zone. This has produced microstructures saturated in Cu with little Al 2Cu phase remaining after the solution heat treatment. Owing to the low amount of this phase and the round shape of the particles, the remaining Al 2Cu phase did not have a significant impact on the ductility. One benefit of working with a Cu saturated microstructure is that one can estimate the true temperature of the solution heat treatment by conducting a post-analysis of Cu content in the dendrites. This should be helpful to reduce the variability in properties and to improve the temperature distribution in heat treating furnaces.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:25
Numéro:1
Pages:p. 15-25
Version évaluée par les pairs:Oui
Date:2012
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 > Module d'ingénierie
Mots-clés:B206, ductility, intermetallics, macrosegregation, quality index
Déposé le:09 juin 2016 17:54
Dernière modification:09 déc. 2016 14:45
Afficher les statistiques de telechargements

Éditer le document (administrateurs uniquement)

Creative Commons LicenseSauf indication contraire, les documents archivés dans Constellation sont rendus disponibles selon les termes de la licence Creative Commons "Paternité, pas d'utilisation commerciale, pas de modification" 2.5 Canada.

Bibliothèque Paul-Émile-Boulet, UQAC
555, boulevard de l'Université
Chicoutimi (Québec)  CANADA G7H 2B1
418 545-5011, poste 5630