Monocrystals were wire-drawn up to the onset of stage-IV deformation, and X-ray diffraction line profiling and transmission electron microscopy were used to characterize the microstructure. It was found that the X-ray line profiles were asymmetrical, and were analyzed with regard to residual long-range internal stress changes in the dislocation cell structure during deformation. The dislocation density and the anisotropy of the Burgers vector population were deduced from the broadening of the line profiles. On the basis of the long-range internal stresses and the Burgers vector anisotropy, a microstructural model was developed which was in good agreement with the phenomenological deformation conditions.

A.Borbély, G.Hoffmann, T.Ungár: Key Engineering Materials, 1995, 103, 211-6