Fracture Behavior of Zr-Based Bulk Amorphous Alloy Under High-Speed Impact

The fracture behavior of the Zr-based bulk amorphous alloy under high-speed impact at room temperature was investigated by self-made high-speed impact device(strain rate ε exceeds 10⁴s^-1), and was contrasted with that under impact of ε about 10²~10³s^-1. The failure surfaces were examined by scanning electron microscopy (SEM). It is found that the typical fracture morphologies of the amorphous alloy are honeycomb-like pattern, cell-like pattern, vein-like pattern, melted belts and liquid-like droplets. Compared to that under impact of ε about 10²~10³s^-1, the fracture surfaces under high-speed impact are relatively rough, the array of vein patterns is relatively disorder, the reduction of the viscosity in major shear band is greater, the melted belts and liquid-like droplets are larger. Also, there are amorphous particles in the honeycomb-like pattern beside micro holes and cracks.