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High pressure torsion (HPT) has been used for the severe plastic deformation (SPD) treatment of molten Fe–12.3at% Nd–7.6 at% B alloy (5GPa, 1rpm, 5rot, room temperature). After HPT the microstructure contained the nanograins of the ferromagnetic Nd2Fe14B phase embedded in the amorphous matrix with uniform composition. It is different to the commercial multicomponent FeNdB-based alloy where two different...
The proposed “two-phase” model of the defect structure formed upon SPD is based on the existence of a statistical mixture of deformation fragments (DF-phase) and dynamically recrystallized grains (RG-phase). Using the TEM and EBSD (kernel approach) methods, the structural parameters (volume fraction and average size) of deformation fragments and recrystallized grains of α-Fe (bcc) and FeNi alloy (fcc...
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