Tensile mechanical properties of CuZr-based bulk metallic glass at room temperature

Due to the limitation of sample dimension and material properties, the studies related on the mechanical properties under compressive conditions of bulk metallic glasses are mainly focused so far. In this paper, a Zr₄₇Cu₄₆Al₆Co₁ bulk metallic glass was chosen for the evaluation of tensile mechanical properties at room temperature. The tensile strength of the samples is about 2000 MPa at room temperature, comparable with the value of other similar CuZr-based bulk metallic glasses. The brittle fracture without yielding and ductility can be observed under the present conditions. The fracture surface of the failed samples is smooth with river-like patterns typical for the morphology of metallic glasses after tensile failure. The results suggested that the brittle fracture mechanism reported in other metallic glass systems controls the fracture behavior of the BMG.