High-Strain-Rate Deformation of Armco Iron Induced by Spherical and Quasi-Spherical Converging Shock Waves and the Mechanism of the alpha-epsilon Transformation

摘要

The structures of two balls made of plain commercial-purity iron and subjected to loading by spherical and quasi-spherical converging shock waves are studied by optical microscopy and transmission electron microscopy at various depths. The high-strain-rate plastic deformation of armco iron under the loading conditions is found to occur via slip, and, in medium and deep layers, it also occurs via the formation of localized deformation bands. An atomic-crystallographic mechanism for the lattice restructuring during the a-e transformation is proposed.