Polycrystalline copper is severely plastically deformed by equal channel angular extrusion to an equivalent strain of 10. Cylindrical ASTM standard tensile specimens machined from the extruded material are deformed in tension until failure. Microstructure and texture are investigated by electron backscatter diffraction in the as-deformed condition and after additional tensile deformation. The as-deformed state is characterized as deformation structure with grain boundaries constituting only one-third of all boundaries. The texture with two dominating components close to <110>{l12} and directly related to the shear deformation in the intersection plane of the channels weakens with tensile deformation and is finally replaced by a restricted <111>+<100> fibre texture characteristic for tensile deformation in the neck region.
展开▼
