The Effects of Prior Cold Work on the Shock Response of Silver

The shock response of simple metals and alloys are influenced by a number of factors, including the unit cell, prior deformation history and alloying. In this presentation, we discuss the effects of prior cold work on silver. Silver has been studied in two states; an as received hot forged recrystallised condition and a cold rolled state to a reduction in thickness of around 21%. This was chosen so as to mimic the state of commercially available half-hard copper. The main difference is that silver has a significantly lower stacking fault energy than copper, with a corresponding increase in the spacing of partial dislocations, which in turn will affect dislocation motion and generation. In particular, changes in the Hugoniot Elastic Limit (HEL) and spall strength are discussed.