The model of deformation-induced segregation near a moving grain boundary in the Fe-Cr-Ni alloy

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-...

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Bibliographic Details
Published in:Physics of metals and metallography 2006-08, Vol.102 (2), p.135-139
Main Authors: Starikov, S. A., Kuznetsov, A. R., Sagaradze, V. V., Pechenkin, V. A., Stepanov, I. A.
Format: Article
Language:English
Subjects:
Alloys
Metallurgy
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Summary: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.[PUBLICATION ABSTRACT]
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X06080035