Effect of the degree of defectiveness of an original material on the deformation structure formed in the explosive collapse of thick-walled hollow cylinders

The effect of shock-wave preloading on the formation of a deformation structure in copper and tantalum upon subsequent high-velocity plastic deformation performed by the method of explosive collapse of a hollow thick-walled cylinder has been studied. Prehardening is shown to favor the structural uniformity of deformation up to large values owing to creation of a highly disperse intragranular structure. Lavrent’ev Institute of Hydrodynamics, Siberian Division, Russian Academy of Sciences, Novosibirsk 630090. Translated from Fizika Goreniya i Vzryva, Vol. 33, No. 6, pp. 108–120, November–December, 1997.