Fragmentation behavior of Armco iron and HF-1 steel explosive-filled cylinders

The fragmentation response of explosive-filled cylinders of Armco iron and HF-1 steel with two heat treatments has been determined. The cylinders were filled with cast-in-place composition B explosive and detonated. At least 99% of the metal mass was recovered in all the experiments. The recovered fragments had both brittle and shear fracture surfaces. The average fragment mass for the Armco iron and HF-1 steel experiments was 6.3 and 0.9 g, respectively. Average engineering radial strain values for the fragments were 0.35 and 0.12 for Armco iron and HF-1 steel, respectively. A scheme was devised for characterizing the recovered fragments according to their cylindrical and fracture surfaces. Fragment mass distributions are presented for the characterized fragments.