Structural Changes in Iron-Nickel Alloys under the Action of a Flux of High-Speed Powder Particles: II. Effects of Ultradeep Penetration

摘要

Structural changes caused by ultradeep penetration of high-speed SiC or chromium particles into iron-nickel alloys and steel 30 were studied. Two versions of structural changes observed near the imbedded penetrating particles correspond to two types of ultradeep-penetration channels such as "high-power" (heavy deformation) channels and channels characterized by insignificant deformation. The penetration along high-power channels is governed by the specific features of high-strain-rate plastic deformation caused by the action of shock waves. No amorphization or dispersed fine structures resulting from the extreme degrees of deformation of the target materials were observed near the high-power channels. The initial powder particles were observed to be refined by an order of magnitude even prior to the penetration into the target material.