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Through Process Modeling (TPM) of Grain Structure Evolution in 6xxx Series

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Through Process Modeling (TPM) of Grain Structure Evolution in
6xxx Series Aluminum Extrusions

Ole Runar Myhr 1, Trond Furu 1, Ole Johannes Emmerhoff 2, Inge Skauvik 2, and Olaf
Engler 3
1 Hydro Aluminium R&D, Sunndalsøra, Norway,

2 Hydro Aluminium R&D, Håvik, Norway,and

3 Hydro Aluminium R&D, Bonn, Germany

Track: EXTRUSION/DIE THEORETICAL - Modeling, Microstructure and Simulation

ABSTRACT—The present paper demonstrates how grain structure evolution in extruded 6xxx
series aluminum alloys can be simulated using a Through Process Modeling (TPM) approach
where different physical based models are integrated with a dedicated FE-code for extrusion
simulations. This modeling approach has been used to predict the fraction recrystallized and the
recrystallized grain size through the thickness of profiles that have been subjected to different
homogenization cycles as well as different ram speeds during extrusion. The comparison between
model simulations and experimental data covering a broad range in processing conditions show
good correlations. Finally, examples are presented on applications of the TPM concept in practical
case studies where the interplay among homogenization conditions, extrusion speed, and cooling
conditions is investigated with respect to the resulting grain structure distribution in the profile.

© 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.