Available online 11 January 2023
Abstract
Deformation behavior as well as microstructural evolutions of a rolled AZ31 magnesium alloy with and without pre-existing extension twins were studied using
compression tests which performed along different orientations at a
temperature range of 25–350 °C. The results implied that the initial
texture not only influence the evolution of flow stress, but also change
the size and fraction of recrystallized grains. In contrast to samples
parallel to rolling and transverse directions, compression along normal
direction resulted in a respectful softening at 150 °C. The largest size
and fraction of new grains at 250 °C were recorded after deformation
along rolling direction, while the maximum flow softening was observed
during deformation along normal direction. The anisotropy in
microstructural evolutions was still retained at 350 °C. Pre-existing
twins could reduce the anisotropy of material in respect of flow stress
as well as DRX progression, where TD sample showed the lowest DRX
fraction at 250 °C. Quaternion misorientation data obtained from EBSD analysis of pretwinned material implied that initial texture could not
significantly influence final texture. A different misorientation
distribution was realized after deformation of pretwinned material along
ND and RD directions.
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