High temperature deformation behaviors of a CuZr-based bulk metallic glass composite

In this study, the deformation behaviors of a Cu47.5Zr48Al4Nb0.5 bulk metallic glass composite (BMGC) in the temperature ranging from 663 K to 763 K have been investigated using uniaxial tensile tests and high-energy Xray diffraction. Within the supercooled liquid region (SLR), the studied BMGC exhibits superplasticity and the deformation of the studied BMGC basically involves two modes, i.e., homogeneous and inhomogeneous deformation. As the temperature increases in the SLR, the yield strength of the studied BMGC gradually decreases whereas the plastic strain increases, revealing that the amorphous phase plays a dominant role in the deformation. However, there is a significant increase in the yield strength above the crystallization temperature, which indicates that the deformation is mainly contributed by the crystalline phase. The results obtained in this manuscript provide a better understanding of the temperature dependence of deformation behaviors in BMGCs.

Automated summary

In this study, the deformation behaviors of a Cu47.5Zr48Al4Nb0.5 bulk metallic glass composite (BMGC) in the temperature ranging from 663 K to 763 K have been investigated. The studied BMGC exhibits superplasticity within the supercooled liquid region (SLR) and the deformation involves both homogeneous and inhomogeneous modes. The temperature dependence of deformation behaviors in BMGCs was better understood through this study.