Abstract
The impact of a steel striker moving at a velocity of ∼1 km/s on a powdered material (lead, tungsten) has been studied in order to assess the possibility that microscopic particles of the target penetrate into the striker volume. The microstructure and composition of steel upon impact was studied by scanning electron microscopy and electron probe microanalysis. The powder was compacted to a continuous state, with partial fusion at the surface of the striker. No evidence of penetration of the powdered material into the striker volume has been found. Foreign (different from steel matrix) inhomogeneities observed in the sample microstructure have the form of nonmetal inclusions, consisting predominantly of manganese and steel, and regions of local deformation distributed over grain boundaries. This pattern of inhomogeneities appearing in the steel is the same as that observed upon striker penetration into continuous and porous targets.
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