Molecular dynamics simulation and analysis on the stress induced crystallization behavior of metallic glass Cu

摘要: The compressive deformation of metallic glass Cu was studied under uniformly distributed strains with different rates at 1 K temperature using molecular dynamics simulations. interaction between atoms in the system adopts embedded atom method (EAM) reported by Mishin. We found that MG is an elastic/perfect plastic material and Young modulus about 50 Gpa strain from 0.1ns-1 to 10 ns-1. At low sample deforms inhomogeneously amorphous phase transforms continuously a crystalline phase. It observed nucleation, growth mergence processes are induced stress. high passes through deformations homogeneously keeps structure. higher flow stress occurs rate increasing. effect important factor induces crystallization just like effect. relationship characteristic nucleation determines mechanism MG.