Surface Morphology of Deformed Amorphous-Nanocrystalline Materials and the Formation of Nanocrystals

Resumo

The formation of nanocrystals under deformation in Al-, Fe-, and Co-based amorphous alloys are studied using X-ray diffraction and transmission and scanning microscopy methods. It is shown that the presence of shear bands in deformed amorphous alloys is an insufficient condition for nanocrystal formation. The presence of a large number of intersecting shear bands and an increase in the material temperature in the shear-band region in the case of intense plastic deformation contributes to nanocrystal formation.