Shear strain rate sensitivity and crystallisation kinetics investigation in melt spun Cu64Zr36 binary metallic glass

Shear strain rate effect on crystallisation behaviour and characteristic temperatures of the three well-known glass formers in Cu-Zr binary amorphous system, namely Cu50Zr50, Cu56Zr44 and Cu64Zr36, were investigated. The crystallisation behaviour of Cu64Zr36 was uniquely found to be heavily dependent on shear strain rate. Crystallisation kinetics were studied through Isochronal transformation and isothermal transformation. The activation energy of crystallisation of each case was compared and contrasted. Johnson-Mehl-Avrami (JMA) analyses were also employed to study its kinetics behaviour. Finally, high angle annular dark field (HAADF) scanning transmission electron microscopy (STEM) combined with laser-assisted local electrode atom probe (LEAP) investigation revealed no detectable clustering or phase separation.

Automated summary

The effect of shear strain rate on the crystallization behavior and characteristic temperatures of three well-known glass formers (Cu50Zr50, Cu56Zr44, and Cu64Zr36) in the Cu-Zr binary amorphous system was investigated. It was found that the crystallization behavior of Cu64Zr36 was heavily dependent on shear strain rate. Crystallization kinetics were studied using isochronal and isothermal transformation, and the activation energy of crystallization was compared and contrasted. Johnson-Mehl-Avrami (JMA) analysis was employed to study the kinetics behavior. High angle annular dark field (HAADF) scanning transmission electron microscopy (STEM) combined with laser-assisted local electrode atom probe (LEAP) investigation revealed no detectable clustering or phase separation.