Compression properties of Ti₄₈Zr₂₀Nb₁₂Cu₅Be₁₅ in-situ crystal phase amorphous alloy

The Ti₄₈Zr₂₀Nb₁₂Cu₅Be₁₅ amorphous alloy with in-situ β-Ti(Zr, Nb) crystal phase was prepared by copper mould injection casting. The mechanical behavior was investigated under both quasi-static and dynamic compression at room temperature. Microstructures were investigated by scanning electron microscopy. The result shows that the Ti₄₈Zr₂₀Nb₁₂Cu₅Be₁₅ amorphous alloy is composed of amorphous matrix and the β-Ti(Zr, Nb) crystal phase uniformly distributed in the matrix. The fracture stress increases with the increasing of strain rate, revealing a strain rate hardening effect for the Ti₄₈Zr₂₀Nb₁₂Cu₅Be₁₅ in-situ crystal phase amorphous alloy under quasi-static and dynamic compression at room temperature. It is also found that the adiabatic temperature rising and the fragment of the amorphous alloys in dynamic compression results in that the fracture stress and the fracture strain during dynamic compression are much lower than that during quasi-static compression at room temperature.