Micro-indentation-Induced Deformation Studies on High-Pressure-Torsion-Processed Zr 62 Cu 22 Al 10 Fe 5 Dy 1 Metallic Glass

摘要

In this study, the deformation behavior induced by micro-indention is investigated on Zr-based metallic glass in the melt-spun ribbon form. Further, melt-spun ribbon samples were severe plastically deformed using high pressure torsion method with variation in anvil rotations using a compressive pressure of 6 GPa. Calculation of free volume is performed on melt-spun ribbon and on deformed samples using x-ray diffraction analysis and is found to marginally increase in later. Formation of free volume influences the deformation mechanism through early initiation and propagation of shear bands in high-pressure-torsion-processed samples. The presence of amorphous structure after high pressure torsion process is an indication that glassy phase is retained in severe plastic deformed samples. The present research work aims to understand the role of high pressure torsion and its correlation with micro-indentation-induced deformation behavior in Zr62Cu22Al10Fe5Dy1 metallic glass samples.{GRAPHICAL ABSTRACT}