Dynamic tensile response of Zr_(41.2)Ti_(13.8)Cu_(12.5)Ni_(10)Be_(22.5) bulk metallic glass

摘要

Bulk amorphous alloys have many potential applications due to their unique properties, such as superior strength and hardness [1,2], excellent corrosion resistance [3], shaping and forming in a viscous state [4], reduced sliding friction and improved wear resistance [5], and low magnetic energy loss [6]. Zr_(41.25)Ti_(3.75)Cu_(12.5)Ni_(10)Be_(22.5) bulk metallic glass as sort of new structural material has been very attractive for industry and military use. It is very important to clarify the influence of strain rate on the portant to clarify the influence of strain rate on the mechanical properties of bulk amorphous alloy, especially at high strain rates, because deformation at various strain rates would be encountered in tension or compression during service. Bruck et al. [7,8] studied the quasistatic compression and tension behavior of Zr_(41.25)Ti_(3.75)Cu_(12.5)Ni_(10)Be_(22.5) bulk metallic glass at strain rates from 10~(-4) s~(-1) to 10~(-3) s~(-1), and the result showed that the compressive fracture strength and the tensile fracture strength are closely identical. Besides, they also studied the dynamic compressive behavior of the material at strain rates from 10~2 s~(-1) 10~4 s~(-1), and found that it would soften when the compressive strain rate exceeds 2700/s. However, few data are currently available on the dynamic tensile behavior of bulk metallic glasses. In this paper, the dynamic tensile behavior of the Zr_(41.25)Ti_(3.75)Cu_(12.5)Ni_(10)Be_(22.5) bulk metallic glass was presented at strain rates from 10~(-1) s~(-1) to 10~3 s~(-1).