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Experimental and Numerical Investigations of Al/Mg Compounds
Author(s) -
Kirbach Carola,
Stockmann Martin,
Ihlemann Jörn
Publication year - 2014
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201410074
Subject(s) - extrusion , intermetallic , brittleness , materials science , forming processes , composite material , alloy
Al/Mg compounds produced by hydrostatic extrusion exhibit unique characteristics regarding high strength and low weight, which are required by safety part applications in lightweight constructions. Between the two materials an interface in form of a brittle intermetallic phase consisting of Al 2 Mg 3 and Al 12 Mg 17 arises during the production process. However, a certain plastic deformability of the semi‐finished product is essential for further forming processes. Even under multi‐axle load during a radial upsetting process, the interface maintains a full material joint although a fragmentation and a new secondary interface between the fragments can be observed. Due to the evaluations of light microscopy images and Eulerian Hencky strain values at the interface, which are obtained with the help of the Digital Image Correlation, a relation between the strain and the boundary layer's appearance seems reasonable. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)