Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-10057
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Main Title: Analysis of the flow imbalance on the profile shape during the extrusion of thin magnesium sheets
Author(s): Gall, Sven
Müller, Sören
Reimers, Walter
Type: Article
Language Code: en
Abstract: The extrusion process facilitates the production of magnesium sheets featuring a very thin thickness as well as excellent surface properties by using a single process step only. However, the extrusion of the magnesium sheets applying not optimized process parameters, e.g. low billet temperature or/ and poorly deformable magnesium alloy, produce pronounced buckling and waving of the extruded sheets as well as a variation of accuracy in profile shape along the cross section. The present investigation focuses on the FEM-simulation of the extrusion of magnesium sheets in order to clarify the origin of the mentioned effects. The simulations identify the flow imbalance during extrusion as the main critical factor. Due to the flow imbalance after passing the die a large compression stress zone is formed causing the buckling and waving of the thin sheets. Furthermore, the simulations of the magnesium sheet extrusion reveal that the interaction of the material flow gradients along the width and along the thickness direction near the die orifice lead to the variation of the accuracy in profile shape.
URI: https://depositonce.tu-berlin.de/handle/11303/11166
http://dx.doi.org/10.14279/depositonce-10057
Issue Date: 31-Dec-2013
Date Available: 19-May-2020
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Subject(s): alloys
finite-element analysis
extrusion
magnesium sheets
FEM-simulation
flow imbalance
License: http://rightsstatements.org/vocab/InC/1.0/
Journal Title: AIP Conference Proceedings
Publisher: American Institute of Physics (AIP)
Publisher Place: Melville, NY
Volume: 1567
Issue: 1
Article Number: 1098
Publisher DOI: 10.1063/1.4850162
EISSN: 1551-7616
ISSN: 0094-243X
Notes: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in AIP Conference Proceedings 1567, 1098 (2013) and may be found at https://doi.org/10.1063/1.4850162.
Appears in Collections:FG Metallische Werkstoffe » Publications

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