Simulation of effect of twin orientation on deformation mechanism of Au nanowire
In this work,the relationships between twinning orientation and mechanical properties were investigated by molecular dynamics method,and the range of twinning orientation angles occurring different deformation mechanisms was revealed.In the small twinning orientations,the nanowires have high strength,and the strain localization caused by twin boundary-dislocation interaction dominates its plastic deformation.In the medium twinning orientations,the detwinning is a governing deformation mechanism.Specifically,the complete detwinning induces strain hardening in the twinning orientation angles(30°≤θ≤60°),which results in its high plasticity.In the large twinning orientations,the nanowires possess high strength but poor plasticity,and the dislocation linkage dominates its plastic deformation.
Au nanowiremolecular dynamics simulationtwinning orientationdeformation mechanism
NETL
NSTL
万方数据
