Texture evolution in oriented magnesium single crystals processed by equal channel angular pressing
作者： Petra Šedá , Andriy Ostapovets , Aleš Jäger , Pavel Lejček
DOI: 10.1080/14786435.2011.643249
关键词: Materials science 、 Pressing 、 Electron backscatter diffraction 、 Deformation mechanism 、 Condensed matter physics 、 Magnesium 、 Crystallography 、 Crystal twinning 、 Single crystal 、 Slip (materials science)
摘要: Magnesium single crystals with different initial orientations were processed by single-pass equal channel angular pressing (ECAP) at 503 K. The texture in the after ECAP was investigated electron backscatter diffraction and compared to simulations based on a visco-plastic self-consistent model. results show that orientation of [0001] ⟨10 0⟩ axes respect die geometry significantly influences activation various deformation modes resulting evolution. Depending orientation, {10 2} twinning represents an important mechanism early stages forming because it causes reorientation matrix suitable for slip activity. Simulations indicate that, addition ⟨a⟩ basal slip, there is activity ⟨c + a⟩ pyramidal all crystals. non-basal systems (⟨a⟩ prismatic pyramidal) active containing structure components axis parallel ...
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