PECULIARITIES OF HIGH -RATE DEFORMATION OF COPPER UPON CONVERGENCE OF CYLINDRICAL CHANNELS BY ACTION OF SHOCK WAVES

This work presents a newly developed experimental method. The method is simple, relatively inexpensive, and expected to be exceedingly useful in studies of material behavior at strain rates on the order of 10(5)-10(7) s(-1). Application of this method as a tool for validation is likely to be exceedingly advantageous in the development of predictive models applicable to flow in this strain rate regime. The method focuses on the convergence of cylindrical holes fabricated into specimens subjected to shock loading. The method is applied herein to M1Cu. Hole convergence is observed to be accompanied by two forms of mesoscopic heterogeneous deformation: intergranular grain sliding, and intragranular deformation localization (likely due to twin formation). It is possible that the present work represents the first time that intragranular deformation localization structures have been seen to develop in Cu under such low intensity shock loading (s~1.6 GPa; e ~10(5)-10(7) s(-1)).