| The microscopic mechanism of amorphous solid plastic strain has not been well explained.The most obvious feature of the amorphous solid plastic strain in microscopic is that the amorphous solid is adapted to the shear strain by localized rearrangement under stress loading,rather than depending on the dislocation slip in the crystalline material.The shear transformation zone(STZ)model is a widely accepted theoretical model that describes the local rearrangement mechanism of amorphous solid microscopic atoms.However,few experiments have so far been conducted to verify that the STZ model has a reliable correlation with the generation of macroscopic shear bands.In this paper,we use the molecular dynamics method to shear the CuZr alloy with different components,and try to use the simplified two-dimensional STZ model to analyze the experimental results,trying to verify the reliability of the model in the experiment.We found in the experimental results that the number of T1-event in the STZ model has a strong negative correlation with the magnitude of the stress as the strain increases,At the same time,the time of T1-event will be slightly earlier than that of stress,but won’t larger than one half of the mean strain duration of a complete T1-event. |
