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Thixoforming of Steel: New Tools Conception to Analyse Thermal Exchanges and Strain Rate Effects

Communication avec acte
Author
CEZARD, Pierre
ccBECKER, Eric
MATHIEU, Stéphane
PIERRET, Jean-Christophe
93075 Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich [ULiège]
RASSILI, Ahmed
93075 Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich [ULiège]
107452 Laboratoire de Conception Fabrication Commande [LCFC]

URI
http://hdl.handle.net/10985/9050
DOI
10.1063/1.2729670
Date
2007

Abstract

Through different papers [1,2], authors shown that the influence of thermal exchanges was a first order parameter on the semi-solid steel behaviour, and certainly for every semi-solid metallic materials. These thermal exchanges hide other parameters effect like, for example, the strain rate influence. This paper tries to determine the influence of these two parameters by using a new extrusion device on a hydraulic press. This new tools conception annihilated the influence of the decrease of the punch speed before stopping and permitted to have a constant speed during the experiment. This work also deals with the homogeneous flow during thixoforming of steel and shows the importance to couple initial temperature of the slug with punch speed. This paper presents different conditions which permitted to have a homogeneous flow by keeping a low load.

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