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The model of deformation-induced segregation near a moving grain boundary in the Fe-Cr-Ni alloy |
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| Authors: | S. A. Starikov A. R. Kuznetsov V. V. Sagaradze V. A. Pechenkin I. A. Stepanov |
| Affiliation: | (1) Institute of Metal Physics, Ural Division, Russian Academy of Sciences, ul. S. Kovalevskoi 18, Ekaterinburg, 620041, Russia;(2) Russian Federal Research Center Leipunskii Institute of Physics and Power Engineering, pl. Bondarenko 1, Obninsk, 249020, Russia |
| Abstract: | A model is proposed of diffusion-induced segregation at a moving grain boundary in a three-component alloy upon severe plastic deformation with allowance for generation and absorption of point defects and their mutual recombination. Redistribution of atoms of alloying elements and formation of near-boundary segregates during severe plastic deformation in stable austenitic alloys of the Fe-12Cr-30Ni type is studied. It has been shown by numerically solving an appropriate set of equations that the motion of a grain boundary leads to the formation of a deformation-induced segregation with an asymmetrical profile of the component concentrations. The boundary is being enriched with nickel and depleted of the other components. |
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