Recently some of thin foils from KoBo extruded samples (comercial purity titanium and high purity zinc) have finally been examined in TEM and some crystal orientation microscopy have been performed on them. What was interesting is that although on SEM with EBSD, measured grain sizes are generally in micron range in TEM all types of deformed samples seems to have some nanostructures in them. This is especially visible in case of zinc where we could see 100 nm diameter grains in TEM while on EBSD average grain size was in range of 20 micrometers. Observed nanostructures can be responsible for characteristic fluctuation of misorientations inside zinc grains.
Second interesting observation is that although diffraction patterns from zinc seem to be of good quality, indexing program is unable to properly solve diffraction for zinc lattice. Our colleagues from AGH already had similar problems but in case of SAD patterns. It seems as though zinc after KoBo had different lattice parameters than the same material before the deformation.