Workability of the supercooled liquid in the Zr65Al10Ni10Cu15 bulk metallic glass

The workability of the supercooled liquid in metallic glass has been examined through the extrusion of a Zr65Al10Ni10Cu15 at.% bulk glassy alloy with a wide supercooled liquid region. The metallic glass exhibited superplastic-like deformation behavior at high strain rates, resulting in an excellent workability. The working throughout a wide range of extrusion conditions was compatible with retaining the glass phase and the original strength. The extrusion maps and the expression between extrusion temperature, pressure and ram-speed have been established. Moreover, the features of working such as the Barus effect and the advantage of a small stepwise increase in strain rate have been revealed.