Tool design induced anisotropic flow behavior of hot extruded aluminum profiles

Stefan Ossenkemper, Matthias Haase, Celal Soyarslan, Andreas Jäger, A. Erman Tekkaya

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


The hot extrusion process may lead to frequently observed textures in the profiles, like fiber structures in longitudinal direction. Aluminum profiles (AA6060) were extruded with different tool types (flat-face dies and modified porthole dies). Compression tests of cylindrical specimens, which were machined out of these profiles likewise in extrusion direction, were conducted to examine possible effects of the in-plane anisotropy in lateral direction. A hardness distribution over the cross section of the specimens was measured. It was found that dependent on tool design and profile geometry, the specimens developed preferred lateral flow directions during upsetting. Simulations of the upsetting test, with assigned Hill parameters to consider anisotropy of the material, showed, that this anisotropy, not the local hardness nonuniformity, is the main reason for the detected plastic flow properties.

Original languageEnglish
Title of host publicationAdvances in Hot Metal Extrusion and Simulation of Light Alloys
EditorsA. Erman Tekkaya, Andreas Jäger
PublisherTrans Tech Publications Ltd
Number of pages8
ISBN (Print)9783037858837
Publication statusPublished - 2014
Externally publishedYes
EventInternational Conference on Extrusion and Benchmark, ICEB 2013 - Dortmund, Germany
Duration: 8 Oct 20139 Oct 2013

Publication series

NameKey Engineering Materials
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795


ConferenceInternational Conference on Extrusion and Benchmark, ICEB 2013


  • Aluminum
  • Anisotropy
  • Cold forging
  • Flow behavior
  • Hot extrusion


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