Dynamic deformation and fracture behaviors of two Zr-based amorphous alloys

Abstract

Dynamic deformation and fracture behaviors of Zr-based amorphous alloys were investigated in this study. Quasistatic and dynamic compressive tests were conducted using a universal testing machine and a compressive Kolsky bar, respectively, and then the test data were analyzed in relation to microstructure and fracture mode. Quasi-static compressive test results indicated that the compressive strength of the amorphous alloy containing dendritic beta phases was similar to that of the amorphous alloy, while the ductility was better. Under dynamic loading, the maximum shear stress and ductility of the amorphous alloys were considerably lower than those under quasi-static loading because of the decreased resistance to fracture. The deformation and fracture behaviors occurring under quasi-static and dynamic loading conditions were explained by fracture mechanisms observed on fractured surfaces.