A recently developed continuum-mechanical model for stress-induced phase tr
ansitions in solids is applied to a transition generated by impact. The rol
e of transition kinetics in determining the macroscopic response to impact
is discussed; in addition, the special way that "overdriven" phase boundari
es emerge in this model is described. The predictions of the model are comp
ared with experiments involving shock-induced graphite-to-diamond phase tra
nsitions. (C) 2000 American Institute of Physics. [S0021-8979(00)10503-1].