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Metal Flow in Billets of Thin-Walled Extrusions

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Metal Flow in Billets of Thin-Walled Extrusions

Steven R. Claves, Kinga Janiszewska, Wojciech Z. Misiolek, Institute for Metal Forming, Lehigh University
Kinga Janiszewska, Wojciech Libura, Non-Ferrous Metals Department, University of Mining and Metallurgy

Track: EXTRUSION PROCESS - Metal Flow

ABSTRACT --- As the demands for thin-walled extrudates increases, the ability to
understand the material flow in the billet and through the die orifice becomes
increasingly important. This research examines the partially extruded billets of a
relatively simple profile with a thin-walled section. The ram speed, temperature, and
wall thickness have been varied to produce several different flow patterns and resulting
material properties. The grain size, shape, and orientation were examined at multiple
locations in the billet to describe the metal state at varying stages of the extrusion
process. In addition, a neutral line is described in the billet as the line along which the
grains flow parallel to the extrusion direction.

© Extrusion Technology for Aluminum Profiles Foundation (ET Foundation). All rights reserved. No part of The Proceedings may be reproduced in any form without the express written permission of the ET Foundation.

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