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Main Title: Influence of choked angle of bearing channel on profile grain structure during multi-hole extrusion of aluminum alloy
Author(s): Müller, Sören
Sanabria, Vidal
Type: Article
Language Code: en
Abstract: Direct extrusion of aluminum alloy EN AW-6060 was carried out applying a four-hole die with pair-wise parallel and choked long channels. Due to the dissimilar friction inside parallel and choked channels profiles with different length were extruded simultaneously. In order to investigate the grain structure evolution along the whole extrusion process, multiple sections from the beginning to the end of the products were analyzed. Macroetch tests revealed unrecrystallized fibrous, fully recrystallized as well as partially recrystallized grains. The results also showed an axial and radial grain structure variation. At the beginning of the extrudates unrecrystallized fibrous microstructure was observed, while a fully recrystallized structure characterized the end of the products. Additionally, finer grains were present at the surface, whereas coarser grains were found in the center of the extrudates. Finally, numerical simulations allowed estimating the temperature, strain and strain rate evolution along the whole product length. Thus, a correlation between the extrusion parameters, deformation conditions and the grain structure was obtained.
Issue Date: 11-Aug-2018
Date Available: 19-May-2020
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Subject(s): direct extrusion
aluminum alloy
multi-hole die
microstructure evolution
FE simulation
Journal Title: Procedia Manufacturing
Publisher: Elsevier
Publisher Place: Amsterdam [u.a.]
Volume: 15
Publisher DOI: 10.1016/j.promfg.2018.07.195
Page Start: 201
Page End: 208
EISSN: 2351-9789
Appears in Collections:FG Metallische Werkstoffe » Publications

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