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Seam Welds Modeling and Mechanical Properties Prediction

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Seam Welds Modeling and Mechanical Properties Prediction in the Extrusion of AA6082 Alloy

Lorenzo Donati, Luca Tomesani, University of Bologna, Bologna, Italy

Track: EXTRUSION/DIE, PRACTICAL - Hollow Profiles and Heat Exchanger Profiles

ABSTRACT --- This work summarizes the outcome of recent research by the
authors on modeling the formation of seam welds in aluminum extrusion, and on
evaluating the related mechanical properties on the final products. A profile with
a seam weld in the middle section was produced with different die designs, in
order to investigate the relationship between die design and local welding
parameters, such as contact pressure, temperature, time of contact, strain, and
strain rate paths. The local welding conditions were evaluated by complete
thermomechanical, three-dimensional (3-D) Finite Element Method (FEM)
simulation of the processes. Specimens were extracted from the profiles and
tensile tested; the resulting mechanical properties being discussed with respect to
the local welding conditions. The possibility to adopt criteria for assessing the
welding quality is discussed, together with the effect of high-speed damage

© 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.