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Prediction Of Extruded Microstructures Using Experimental & Numerical Modelling

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Prediction Of Extruded Microstructures Using Experimental And Numerical Modelling Techniques

Dr. Chris Harris, Dr. Qiang Li, and Dr. Mark. R. Jolly, University of Birmingham

Track: EXTRUSION PROCESS - Peripheral Coarse Grain

ABSTRACT --- As the use of aluminum increases, so do the demands on its properties
– both mechanical and physical. In some cases extruders require a particular final
microstructure in order to attain specific mechanical properties and in others the
resulting, although undesired, microstructure is an almost accepted part of the process,
for example peripheral coarse grain in the extrusion of hard alloys. In this study, the
formation of the final extruded microstructure was investigated as a function of the
strains, strain rates and temperatures produced in the aluminum extrusion process
which are themselves a function of a particular extrusion die design and process control.
The investigations were carried out using a combination of industrially extruded metal,
laboratory scale experimentation and Finite Element Modeling of the whole extrusion
process. This paper will introduce the current findings on the development of
fundamental techniques that can be used within industry to predict the microstructures of extruded products, and ultimately be used to specify extrusion die design and process
control parameters in order to accurately produce the required extruded microstructures.

© 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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