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Main Title: Modification of the anisotropy and strength differential effect of extruded AZ31 by extrusion-shear
Author(s): Jähnke, Martin
Gensch, Felix
Müller, Sören
Type: Article
Language Code: en
Abstract: The extrusion of magnesium alloys results in a pronounced fiber texture in which the basal planes are mostly oriented parallel and the c-axes are oriented perpendicular to the extrusion direction. Due to this texture the Strength Differential Effect (SDE), which describes the strength difference between tensile and compression yield strength, and the elastic anisotropy in the sheet plane are obtained during extrusion. The objective of the investigation was to decrease the SDE and anisotropy through specifically influencing the microstructure and texture. To accomplish this objective, the forming processes extrusion (EX) and equal channel angular pressing (ECAP) were combined and integrated into one extrusion die. This combination is called extrusion-shear (ES). With an ES-die, billets of the magnesium alloy AZ31B were formed into a sheet with the thickness of 4 mm and the width of 70 mm. The angles of the used ECAP-applications in the ES-dies were set to 90° and 135°. The results show that the extrusion-shear process is able to decrease the anisotropy and SDE through transformation of the texture compared to conventional extrusion process. Also grain refinement could be observed. However, the outcomes seem to be very sensitive to the process parameters. Only by using the ES-die with an angle of 135° the desired effect could be accomplished.
Issue Date: 3-May-2018
Date Available: 19-May-2020
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Subject(s): Strength Differential Effect
equal channel angular pressing
materials forming
crystal structure
mechanical stress
Journal Title: AIP Conference Proceedings
Publisher: American Institute of Physics (AIP)
Publisher Place: Melville, NY
Volume: 1960
Issue: 1
Article Number: 030008
Publisher DOI: 10.1063/1.5034851
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 1960, 030008 (2018) and may be found at
Appears in Collections:FG Metallische Werkstoffe » Publications

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