DYNAMIC RECRYSTALLIZATION IN DETONATING TANTALUM SHAPED CHARGES - A MECHANISM FOR EXTREME PLASTIC-DEFORMATION

In a systematic examination and comparison of two different tantalum s tarting liner cones and corresponding recovered slugs and jet fragment s for detonated shaped charges, using light and transmission electron microscopy observations, the slug and jet grain sizes were reduced fro m the liners by nearly a factor of 100. The slug and jet cross section s exhibited different concentric zones of varying grain and substructu res, and these also varied with a difference in the starting liner con e grain structure. These observations provide unambiguous evidence for dynamic recrystallization as a prominent mechanism for deformation in the detonating shaped charge.