Metallography study of structure change of surface layers of tungsten monocrystals after turning

Studies of the value and character of location of defective layer of tungsten monocrystals after machining turning - are carried out. Metallographical and X-ray structural analyses as well as fractographical studies using raster electron microscope for plan and during layer-by-layer etching have shown that the structure of surface layers of tungsten monocrystals after machining has a complex character. The character of distribution of macro- and microcracks of the surface layer of tungsten monocrystals as well as regularity of dislocation distribution during layer-by-layer etching are clarified. The depth of location of defective layer depending on machining regimes is evaluated and is conditionally divided into some regions-zones