Ultrahigh-strength submicron-sized metallic glass wires

摘要

In situ deformation experiments were performed in a transmission electron microscope to investigate the mechanical properties of submicron-sized Pd_(40)Cu_(30)Ni_(10)P_(20) metallic glass (MG) wires. Results show that the submicron-sized MG wires exhibit intrinsic ultrahigh tensile strength of ～2.8 GPa, which is nearly twice as high as that in their bulk counterpart, and ～5% elastic strain approaching the elastic limits. The tensile strength, engineering strain at failure and deformation mode of the submicron-sized MG wires depend on the diameter of the wires.