DISLOCATION MECHANICS UNDER EXTREME PRESSURES

摘要

Dislocation effected plastic flow stress levels in shock experiments are accounted for in terms of control by defect creation at the shock front: in the fcc case, of a high dislocation density; and, in the bcc case, of deformation twins. Isentropic compression experiment (ICE) results differ in that the initially resident, much lower, dislocation density is required to “carry the load” by moving at very high drag-resisted velocities.