Energy radiation and limiting speeds of fast moving edge dislocations in tungsten

The energy loss of a uniformly moving dislocation radiating lattice waves is quantitatively studied by atomistic simulations. The velocity dependence of the energy radiation provides a unique way to understand limiting behavior exhibited by fast moving dislocations. In combination with theoretical analyses, the simulations provide a consistent atomic-level picture of near-sonic, transonic, and supersonic dislocation motions in crystalline materials.