Dynamics characteristics of edge dislocation in Mo by molecular dynamics

This investigation simulates the dynamics characteristics of edge dislocation in BCC crystal Mo under different temperature and abrupt shear strains by molecular dynamics (MD) simulation. Results show a decrease of mobility with increasing temperature, namely the drag force increased with increasing temperature and decrease with increasing loading. A stationary dislocation can surmount the wave velocity under an abrupt shear strain in crystal Mo in this simulation. Results indicate that there are three wave speeds in the 111 direction in which the dislocation moved. The movement of the edge dislocation when it surmounts the transverse wave speed and drops to subsonic is pictured.