Distinct compressive and tensile behavior of a metallic glassy composite at elevated temperature

The mechanical properties and deformation behaviors of a Ti-based metallic glassy composite consisting of a dendrite phase with a body-centered-cubic structure and a glassy matrix were examined under the compression and tension at elevated temperature. The composite was characterized by the work-hardening behavior and high plasticity of over 50% under compression loading but the strain-softening behavior with strain of 25% under tension loading in supercooled liquid region temperatures. The difference was discussed according to the local uniformity and instability between the multiplied dislocations in the dendrite phase and the homogenous viscous flow of the glassy matrix.