Deformation behavior of a Ti-based bulk metallic glass composite in the supercooled liquid region

Deformation behavior of the Ti₅₀Zr₂₀Nb₁₂Cu₅Be₁₃ bulk metallic glass composite in the supercooled liquid region have been investigated by uniaxial compressive aswell as tensile tests. The results indicated that all stress-strain curves show work-hardening and work-softening phenomenon. The high temperature deformation behavior is sensitive to strain rate and temperature. Rheological behavior of Ti₅₀Zr₂₀Nb₁₂Cu₅Be₁₃ bulk metallic glass composite was analyzed by activation volume quantitatively, which implied that the Ti₅₀Zr₂₀Nb₁₂Cu₅Be₁₃ has better rheological behavior than that of conventional Ti alloy, but not as good as Ti-based bulk metallic glass. In addition, dendrite morphology of the Ti₅₀Zr₂₀Nb₁₂Cu₅Be₁₃ almost does not change after deformation, and tensile fracture is full of dimples.