Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 517, Issue 1-2, Pages 160-169Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2009.03.045
Keywords
Magnesium alloy; Compression twins; Microtexture; Recrystallization
Categories
Funding
- National Natural Science Foundation of China [50571009]
- national key laboratory for advanced metals and materials [2007AMM006]
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in contrast to cubic metals, the dominant recrystallization nucleation site of hexagonal magnesium is compression twins or the shear bands evolved from them. In this paper, we determine the macrotextures and microstructures of a magnesium alloy AZ31 during static recrystallization. We interpret these data according to a microtexture analysis performed with the EBSD technique of new grains formed at compression twins in the early stage of static recrystallization. The results show that the orientation characteristics in local regions during nucleation are similar to those of subgrains within compression twins or shear bands. However, the new grains mainly take the orientations of the subgrains, which have been subjected to complicated orientation rotations. This phenomenon is attributed to the large amount of their stored energy. Despite the difference between new grain orientations and those of the deformed matrix, the retained deformation texture after annealing is explained mainly by the incomplete recrystalization of magnesium. (C) 2009 Elsevier B.V. All rights reserved.
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