Inhomogeneous Distribution of Residual Deformation Effects inTextured Bcc Metals

The distribution of residual deformation effects in textured metal sheets was studied byX-ray diffractometric methods using a position-sensitive detector (PSD). The elaboratedprocedure is based on the geometric principles of texture measurement, while the PSD techniqueallows to observe the profile of the X-ray line simultaneously with registering ofits intensity. The proper treatment of experimental results gives values of line intensity,half-width and peak position of each angular position of the studied sample. By analogywith the texture pole figures (TPF), the half-width pole figures (WPF) and the peakposition pole figures (PPF) were constructed. The obtained WPFs describe the distributionof deformation effects in the textured sample depending on grain orientation.The distinct correlation between TPF and WPF is demonstrated for rolled Nb and β-Zr:maxima of WPF fall to minima of TPF, while minima of WPF are located at maxima ofTPF. The PPF exhibits a cross-wise distribution of elastic strains, providing the mutualequilibrium of extended and contracted regions. To explain this regularity, texture formationmechanisms and probable mutual misorientation of neighbouring grains wereconsidered.