Stress-induced martensitic phase transformation in Cu-Zr nanowires

摘要

A novel stress-induced martensitic phase transformation in an initial /{100} B2-CuZr nanowire is reported for the first time in this letter. Such behavior is observed in a nanowire with cross-sectional dimensions of 19.44 × 19.44 A~2 over a temperature range of 100-400 Kand at a strain rate of 1 × 10~9 s(-1) using atomistic simulations. Phase transformation from an initial B2 phase to a BCT (Body-Centered-Tetragonal) phase is observed via nucleation and propagation of {100} twinning plane under high strain rate tensile deformation.