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Mikroskopie und Tomographie Poster: Mi., 14:00–16:30 M-P103
Texture Development in ECAP Processed Mg Si Alloys by Neutron Diffraction
Weimin Gan 1,2 , Heinz-Günter Brokmeier 2,3 , Bernd Schwebke 2,3 , Andreas
Schreyer 2 , Mingyi Zheng 1 , Xiaoguang Qiao 1 , Shiwei Xu 1 , Kun Wu 1
1 School of Materials Science and Engineering, Harbin Institute of Technology, Harbin
150001. P. R. China – 2 GKSS-Forschungszentrum, Geb03, Max-Planck Strasse 1,
D-21502, Geesthacht – 3 Institute of Materials Science and Engineering, Clausthal University
of Technology, Germany
ECAP processing of the as-cast and the as-extruded Mg-Si alloys at different rotation
routes A, B(c), and C from 1 pass to 8 passes was performed in the present work.
Texture evolution of the deformed samples was measured by neutron diffraction at
TEX-2 GKSS. ODF was calculated by series expansion method. For both as-cast and
as-extruded Mg-Si alloys, results showed that route A processing, which the sample do
not rotated between two passes, got the highest pole intensity in each pole figures; while
route Bc processing, which the sample continuously rotated 90 ◦ between two passes,
has the lowest pole density in each pole figures. As for the cast alloys, basal planes
tilted about 10 ◦ around the normal direction after 1 pass deformation; and after 4
passes the intensity increased, but texture type has not changed; 8 passes deformation
made the basal planes nearly parallel to the extrusion-transition direction though the
pole intensity have not changed. Especially, similar as the Mg alloys rolling texture,
which basal planes parallel to the extrusion direction, was formed after 8 passes route
C deformation. As for the extruded Mg-Si alloys, two intensity peaks occurred after
route B(c) processing, which attributed to the 45 ◦ back-and-forth shear deformation.