Structure formation in powdered iron under a pulsed load

The structure and phase composition of powdered iron subjected to a pulsed load (explosive treatment) are investigated, The dependence of the volume fraction of gamma Fe on the load parameters is found by X-ray structural analysis. The phase transition alpha --> gamma is not due solely to thermal effects in the contact zone. The dislocation structure and its spatial order are investigated. On the basis of experimental data and solution of the Fokker-Planck equations, a law describing the substructure evolution as a function of the pulsed-load parameters is established. Shock experiments are proposed as model experiments for the more accurate study of processes occurring in mechanical alloying in high-energy grinding equipment.