Microstructure of iron-manganese alloys G10, G21 and G30 subjected to the action of a flux of high-speed SiC particles

Structural transformations, occurring in the iron-manganese alloys G10, G21 and G30 under the effect of high-velocity (-1 rv/s) SiC particles flux (average size of 60 μm), formed under explosion conditions, are studied through the metallographic, X-ray and magnetic methods. It is shown that significant effect on the density of channels of the particles ultradeep permittivity (CPUDP) in the materials is produced by their microhardness level, with the growth whereof the channels density decreases. The type of the alloy matrix crystalline lattice does not effect the density and character of the CPUDP distribution in the sample volume. The impact of the high-velocity particles flux (HVPF) leads to the occurrence of the martensite γ→ε (G21, G30) and ε→α (G10, G21) transformations in the alloys and also to a noticeable decrease in the crystalline lattice parameter of the α- and γ-phases, which are obviously conditioned by the shock wave effect. The effect of the HVPF SiC causes formation of the complex structural field of voluminous stresses in the alloys. No noticeable increase in the dislocations density in the basic volume of analyzed materials was determined