Effect of Experimental Conditions on 7075 Aluminium Response During ThixoextrusionReport as inadecuate

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1 UTCN - Technical University of Cluj Napoca 2 PIMM - Procédés et Ingénierie en Mécanique et Matériaux Paris 3 LCFC - Laboratoire de Conception Fabrication Commande

Abstract : The deformation behavior of semi-solid aluminum alloy is strongly dependent on themicrostructure. This paper illustrates several experimental research works concerningthixoextrusion 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.

keyword : Semi-solid 7075 aluminium alloy Thixoextrusion Microstructure

Author: Adriana Neag - Véronique Favier - Mariana Pop - Eric Becker - Régis Bigot -

Source: https://hal.archives-ouvertes.fr/


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