Investigation of the mechanical behavior of ion irradiated Ni-free Ti-based metallic glass by nanoindentation

摘要

The mechanical response of ion irradiated metallic glass specimens with nominal composition of Ti_(40)Cu_(32)Pd_(14)Zr_(10)Sn_2Si_2 was investigated by nanoindentation. Surfaces of specimens fabricated by the melt spinning process were irradiated with 4 MeVFe~(2+)ions at 25℃ over a range of fluences from 1 × 10~(12) to 1 × 10~(15) ions/cm~2. Irradiations were also performed at temperatures up to 300℃. Nanoindentation experiments were performed to obtain values of reduced elastic modulus and hardness and to investigate the material's shear band behavior. Irradiation was found to result in a lower reduced elastic modulus and hardness, however was found to increase homogeneous deformation by suppression of shear band activity.