Multiple Shear Bands in Zr-Based Bulk Metallic Glass Processed by Severe Plastic Deformation

The Zr 62 Cu 22 Al 10 Fe 5 Dy 1 bulk metallic glass was subjected to high pressure torsion (HPT) processing at temperatures of 20 and 150°C. Structural studies were carried out by TEM on the lamella-sample prepared from the HPT-specimens in transversal direction to the specimen plane. TEM studies revealed formation of multiple shear bands with spacings in a 20-50 nm range for both HPT states. Shear bands could be divided in two types: primary...