Analysis of preferential orientation in zirconium samples deformed by uniaxial tension using neutron and X-ray diffraction

Two series of zirconium samples were investigated by neutron and X-ray diffraction. First series of the samples was deformed at room temperature (RT), whereas the second series was deformed at 300 degrees C. Both series were deformed on uniaxial tensile machine INSTRON 5882 from strain 0 to 30% (strain step was 5%). The neutronographic texture measurements were performed on the KSN-2 neutron diffracto-meter located at the research reactor LVR-15 in the Nuclear Research Institute, plc. Rez, Czech Republic. The X-ray measurements were performed at the theta/theta X'Pert PRO diffractometer with the Cr X-ray tube. Observed data were processed by the software packages GSAS and X'Pert Texture. Preferential orientation of the (10 (1) over bar0) and (11 (2) over bar0) plane poles is found to be parallel to the rolling direction for both tested deformation series. Poles of the (10 (1) over bar2) and (10 (1) over bar3) planes tend to be parallel to the normal direction (Tables II and III). Orientation of the basal poles is tilted by 45 degrees from the normal direction toward the transverse direction. Sharpness of the resulting texture increases with extends of the applied deformation as well as with rise of the tensile test temperature from the RT level to 300 degrees C. (C) 2015 International Centre for Diffraction Data.