Axial Tensile And Axial Compression Of Cu Base Binary Block Amorphous Alloy By Molecular Dynamics Simulations

Copper-based block amorphous alloys have excellent mechanicalproperties. The copper-based block amorphous alloys CuxZr(100-x)(x=35、50、65)is simulated in the molecular dynamics simulation software LAMMPS. Fastcooling methods of the preparation of Cu base binary block amorphous alloyand the deformation mechanism under the action of external force is simulatedin this software. Relevant factors such as temperature, strain rate, the size arethe main external factors affecting the material deformation mechanism.The effect of temperature, strain rate, and the size on the equivalentelastic modulus and yield strength of amorphous alloy CuxZr(100-x)(x=35、50、65)under unidirectional tensile and compression is studied in this paper. The changeof copper content is also taken into consideration. In addition, the effect of loadmethod, tensile load and compressive load, on the deformation behavior of bulkamorphous alloy is also compared in this paper.The simulation results show that the temperature, strain rate and size hasremarkable effect on the mechanical properties of CuxZr(100-x)(x=35、50、 65).Under the same strain rate and the same size, the bigger the size of bulkamorphous alloy, the smaller the equivalent elastic modulus and yield strengthare. In the stage of plastic deformation size sensitivity is not remarkable. At thesame size and constant temperature, the larger the strain rate is, the smaller theyield strength is. But the equivalent elastic modulus and plastic deformation ofthe strain rate effect is not obvious. With the increase of Cu content, equivalentelastic modulus and yield strength are reduced, and the effect of two kinds ofload on elastic modulus is not obvious. But the tensile yield strength is higherthan the compressive yield strength.