Nanoscale strain mapping and symmetry analysis of Zr50Cu40Al10 metallic glass rejuvenated by high-pressure torsion via 4D scanning transmission electron microscopy

Abstract

Structural rejuvenation by the application of high-pressure torsion suppresses the shear localization of metallic glasses. However, it remains unknown how the local atomic structure of the glass changes under such conditions. In this study, we investigated the strain and order of the local atomic structure after the application of high-pressure torsion by obtaining their spatial distribution through diffraction mapping, finding that anisotropic local strain was introduced, and the local atomic structure was disordered.