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Paper Titles
Simulation of the Co-Extrusion of Hybrid Mg/Al Profiles
p.113
Effect of Tube Wall Thickness in Joining of Aluminum Tube and Holed Rib by Extrusion
p.121
Numerical and Experimental Investigations of the Production Processes of Coextruded Al/Mg-Compounds and the Strength of the Interface
p.129
The Use of Extruded Profiles as Filling Material in Friction Stir Welding (FSW)
p.137
Analysis of Metal Flow of Aluminum through Long Choked Die Channels
p.145
Friction in Double Action Extrusion
p.153
A New Cone-Friction Test for Evaluating Friction Phenomena in Extrusion Processes
p.161
Modelling of Thermo-Mechanical Behaviour of Magnesium Alloys during Indirect Extrusion
p.167
Numerical Analysis of Four-Hole Extrusion of Aluminum Alloys
p.173

Analysis of Metal Flow of Aluminum through Long Choked Die Channels

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Abstract:

The mechanics of metal flow through long choked die channels have been investigated in unlubricated hot aluminum extrusion. Experiments were performed in a laboratory press at an earlier occasion by letting a grid pattern introduced into the billet flow down into the choked die channel to appear adjacent to the channel wall. The grid pattern was then revealed to characterize the metal flow in the channel. A 2D-model of the extrusion process was made. The model was applied to study the conditions in the extrusion experiments and in this model good similarity was obtained with the experiment. New knowledge regarding the metal flow through a choked die channel have been obtained this way, such as; contact conditions, presence of sticking and sliding zones, friction conditions in the sliding contact zone and the velocity profile over the cross-section of the channel.

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Periodical:

Key Engineering Materials (Volume 424)

Pages:

145-152

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.424.145

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Online since:

December 2009

Authors:

Henry Sigvart Valberg

Keywords:

Contact Condition, Die Channel, Metal Flow, Plug Flow, Shear Layer

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