Asymmetric and symmetric rolling of magnesium: Evolution of microstructure, texture and mechanical properties

Title
Asymmetric and symmetric rolling of magnesium: Evolution of microstructure, texture and mechanical properties
Authors
Somjeet Biswas김동익Satyam Suwas
Keywords
Asymmetric rolling; Magnesium; Texture; Continuous dynamic recovery and recrystallization; CDDR; Mechanical property
Issue Date
2012-07
Publisher
Materials science & engineering. A, Structural materials : properties, microstructure and processing
Citation
VOL 550, 19-30
Abstract
In the present study, asymmetric rolling was carried out for incorporating a shear component during the rolling at different temperatures, and was compared with conventional (symmetric) rolling. The microstructures were investigated using electron back-scatter diffraction (EBSD). The strain incorporated was compared with the help of grain orientation spread (GOS). GOS was eventually used as a criterion to partition the microstructure for separating the deformed and the dynamically recrystallized (DRX) grains. The texture of the partitioned DRX grains was shifted by ∼30° along the c-axis from the deformed grains. The mechanism of dynamic recrystallization (DRX) has been identified as continuous dynamic recovery and recrystallization (CDRR). The partitioned deformed grains for the higher temperature rolled specimens exhibited a texture similar to the room temperature rolled specimen. The asymmetric rolling introduces a shear component which shifts the texture fibre by ∼5–10° from the conventional rolling texture. This led to an increase in ductility with little compromise on strength.
URI
http://pubs.kist.re.kr/handle/201004/42907
ISSN
09215093
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KIST Publication > Article
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