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Effect of Experimental Conditions on 7075 Aluminium Response During Thixoextrusion

Article dans une revue avec comité de lecture
Author
NEAG, Adriana
POP, Mariana
ccBECKER, Eric
107452 Laboratoire de Conception Fabrication Commande [LCFC]
ccFAVIER, Véronique
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/9048
DOI
10.4028/www.scientific.net/KEM.504-506.345
Date
2012
Journal
Key Engineering Materials

Abstract

The deformation behavior of semi-solid aluminum alloy is strongly dependent on the microstructure. This paper illustrates several experimental research works concerning thixoextrusion of 7075 aluminum alloy which was carried out at “Arts et Métiers ParisTech” of Metz. Inductive re-heating of the aluminum billet is the method used in order to obtain the target liquid fraction for thixoextrusion. To minimize the heat losses, a sample obtained from a direct extruded bar is inserted in a die for reheating in semisolid state and thixoextrusion. During the experimental re-heating process, the temperature was directly controlled by using thermocouples for temperature measurements in the sample and also in the die. The influence of different working ram speeds and reheating temperature on the microstructure evolution was studied by optical microscopy. The experimental results on extrusion load and microstructure evolution of the component are reported.

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