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Microstructure and flow behaviour during backward extrusion of semi-solid 7075 aluminium alloy

Type
Articles dans des revues avec comité de lecture
Author
NEAG, Adriana
189574 Technical University of Cluj-Napoca
FAVIER, Véronique
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
BIGOT, Régis
107452 Laboratoire de Conception Fabrication Commande [LCFC]
POP, Mariana S.
189574 Technical University of Cluj-Napoca

URI
http://hdl.handle.net/10985/18641
DOI
10.1016/j.jmatprotec.2012.02.003
Date
2012
Journal
Journal of Materials Processing Technology

Abstract

The microstructure and flow behaviour during thixo backward extrusion of 7075 aluminium alloy were investigated. Reheating the steel die and the aluminium billet placed into the die at the same time using an induction furnace provides rapidly a very homogeneous microstructure suitable for thixoforming. During thixoextrusion, despite the high solid fraction, the solid globules are weakly connected and slide over each other without any plastic deformation. The flow remains quasi homogeneous resulting in homogeneous induced microstructure of the component.

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  • Laboratoire de Conception Fabrication Commande (LCFC)
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