Texture Evolution of a Single Crystal Cu-8% at. Al Subjected to the Drawing Process

Single crystals of Cu-8.% at. Al were subjected to cold drawing up to 1.1 true strain. Development of the crystallographic texture was analysed at various stages of the drawing process. Investigations revealed significant crystal rotation and reorientation due to a twinning process, while general 4-fold symmetry around the drawing direction was preserved. Local texture analysis performed on cross-sections perpendicular to the drawing direction showed that due to crystal rotation, the original crystal was initially fragmented into four quadrants. However, within the volume near the central axis the initial cubic orientation was preserved. Subsequent deformation within dominating twinning systems led to further fragmentation which divided the crystal into sectors one eighth the size of the full circular cross-section. The obtained results also indicate that approximation of the drawing process stress state by the tensor having only normal components cannot be used during analysis of the activation of deformation systems.

Automated summary

In this study, single crystals of Cu-8.% at. Al were cold-drawn and the development of crystallographic texture during the drawing process was analyzed. The results showed significant crystal rotation and reorientation due to twinning, while maintaining general 4-fold symmetry around the drawing direction. Local texture analysis revealed that the original crystal was initially fragmented into four quadrants, but the central axis region retained the initial cubic orientation. Further deformation within dominant twinning systems led to additional fragmentation, dividing the crystal into sectors one eighth the size of the full circular cross-section.