MICROSTRUCTURE AND TEXTURE HOMOGENEITY OF ECAP TITANIUM

Microstructure and texture of commercially pure titanium subjected to eight passes by equal channel angular pressing via route Bc at temperature 450 degrees C have been thoroughly analyzed by transmission electron microscopy (TEM), X-ray diffraction and microhardness mapping in flow and top planes and cross section of the billet. Unlike previously published reports some inhomogeneity (i.e. non-equiaxiality of grains) of fine structure has been detected by careful TEM inspection. Texture results have supported that during ECAP pressing at elevated temperature mostly pyramidal slip systems were active.