Measurements of yield stress and strain hardening behavior at strain rates in the range 10(-3)-10(4) s-1 are reported for copper that has been previously shock deformed at a shock pressure of 10 GPa. Characterization of the mechanical properties and microstructure, using transmission electron microscopy, showed that the hardening induced by the shock wave is equivalent to that achieved when copper is deformed at low strain rates to strains between 20% and 30%. Deformation in the shock-deformed material is analyzed using the internal-state-variable model applied by Follansbee and Kocks. The model adequately describes the stress levels, the strain hardening rate, and the dependence of the flow stress on strain rate measured for high strain rate compression tests on the shock-deformed material.
