| The evolution of the structure and mechanical properties of a Fe-15%Co-25%Cr hard magnetic alloy during shear deformation at various angles of rotation in the Bridgman anvils was studied. Severe plastic deformation of the high-coercivity (α1 + α2) state was shown to result in the dissolution of the α1 phase in the early deformation stage. A further increase in the deformation leads to the formation of a single-phase nanocrystalline structure with a grain size of about 50 nm. The dissolution of the α1 phase in the α2 matrix during severe plastic deformation was found to cause an increase in the strength and plasticity characteristics of the Fe-15%Co-25%Cr alloy at all degrees of deformation studied. The maximum plasticity was detected in the alloy with a mixed structure consisting of regions of submicrocrystalline and cellular types, and the formation of nanocrystalline grains led to a certain decrease in the plasticity. |
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