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

High-energy methods of creating a mesocomposite material with inclusions containing nanocrystalline particles

“…To obtain microcrystalline structures in the entire volume of the compacts and to retain the microstructure of the initial material, we used a quasi-dynamic method of compaction. The use of this method for obtaining the mesocomposite was justified by the results of our previous works [9,10], where we found that large high-rate strains led to fragmentation of the microstructure and to reduction of the grain size. In addition, deformation mechanisms typical for the nanocrystalline state of the material were observed at substantially greater grain sizes (5-50 μm) than their threshold value determined under static conditions of deformation (10-200 nm) [1].…”