MICROSTRUCTURAL EFFECTS IN STEEL UNDER THE ACTION OF THE QUASISPHERICALLY CONVERGING SHOCK-WAVE

Investigations were made into structural changes in steel and brass ba lls with diameters of 40 and 60 mm arising from the influence of the e xplosion of spherical charges with thickness of 20 and 10 mm, respecti vely. The explosion was initiated at 12 points uniformly located on th e external surface of the charge, which was surrounded by heavy casing to preserve the samples. In a ball sample 60 mm in diameter structura l changes were conditioned mainly by shock wave interactions and the r esulting deformation. In a sample 40 mm in diameter, where convergent shock wave intensity is notably higher, temperature increase plays an important role, resulting in melting and subsequent crystallization an d phase information.