Indentation creep behavior of a Zr-based bulk metallic glass

The deformation behavior of a Zr44Ti11Cu10Ni10Be25 bulk metallic glass (LM-1B) was studied in the supercooled liquid region by indentation creep test. Before indentation the glass transition and the crystallization temperatures were determined by calorimeter as 625 and 725 K, respectively. The phases formed during crystallization were identified by X-ray diffraction. The indentation creep experiments were carried out at different temperatures and loads. It was found that the creep can be regarded as Newtonian flow at strain rates between 5 × 10−5 and 5 × 10−4 s−1. The values of the viscosity and the activation energy of deformation were determined in the temperature range of 667–687 K.