Influence of initial textures on dynamic recrystallization and textures in AZ31
magnesium alloys
magnesium alloys
(1. School of Materials Science and Engineering,
University of Science and Technology Beijing, Beijing 100083, China;
2. Institut für Metallkunde und Metallphysik,
RWTH Aachen, 52056, Aachen, Germany)
University of Science and Technology Beijing, Beijing 100083, China;
2. Institut für Metallkunde und Metallphysik,
RWTH Aachen, 52056, Aachen, Germany)
Abstract: Microscopy and X-ray diffractometry were applied to inspect the influence of initial texture on dynamic recrystallization and texture formation in AZ31 magnesium alloys during channel die compression. The results show that stress—strain curves, microstructures and textures depend on initial textures. Two types of nucleation sites are detected which are in different proportions depending on initial textures. Dynamic recrystallization proceeds faster in samples with more inhomogeneity. When the basal planes of grains are parallel to rolling plane of sample with scattering around transverse direction, no new texture component occurs and texture is strengthened together with dynamic recrystallization. By other initial textures there are texture changes during hot deformation. New grains rotate gradually to basal orientation at heavy strain.
Key words: magnesium alloy; texture; dynamic recrystallization