Dynamic Fracture Kinetics of Titanium-Based Bulk Metallic Glass and Its Composites

The microstructure of titanium-based, monolithic bulk metallic glass and bulk metallic glass composite from the “DVX” alloy family are investigated to examine the dynamic fracture kinetics under high strain-rate deformation. The spall strength was determined using velocity interferometer system for any reflector (VISAR) from uniaxial-strain plate-impact experiments performed at varying impact velocities. The recompression characteristics after spallation were indicative of the role of microstructure on dynamic fracture characteristics. The recompressive strain rate sensitivity showed that the DV1 bulk metallic glass composite resulted in the most ductile fracture response compared to the other DVX alloys. Post-mortem microstructural characterization of the fracture surface was done on the recovered samples and correlated with the measured damage response.