In July i continued preparation and EBSD microstructure investigations of KoBo extruded samples. First just for sport I prepared sample from some aluminum alloy. Preparation compared to zinc and titanium was a breeze and good results was easily achieved, which was nice change after soft hexagonal materials. Microstructure was similar to this obtained in KoBo-ed titanium (grade2) with twisted grains and clearly visible two main directions around which crystals are oriented. Additionally EBSD IPF maps of those samples tend to have some nice artistic feel to them, and this one was not different.
Second one was sample of grade 4 titanium recently extruded by KoBo method. This one was much more difficult to prepare and finaly only smal areas of good surface was obtained for EBSD mapping. Obtained maps look similar to those from KoBo Grade 2 titanium with two main orientations (strong axial texture) of grains and grain sizes close to 5 micrometers.