Issues »  Volume 37, Issue 12

Determination of Segregation Influence on the Motion of the Interphase Boundaries During Cellular Precipitation

Yu. O. Lyashenko$^{1}$, S. I. Derevyanko$^{1}$, O. A. Shmatko$^{2}$

$^{1}$Bohdan Khmelnytsky National University of Cherkasy, 81 Shevchenko Blvd., 18031 Cherkasy, Ukraine
$^{2}$G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine

Received: 26.08.2015. Download: PDF

The Miedema’s method is used for the description of both the thermodynamic parameters of binary alloys and the segregation energy of components at the interphase boundaries. The thermodynamic approach developed in this paper is applied within the model, which describes the solute drag of the moving interphase boundary in the binary alloys with a polycrystalline structure. This kinetic model allows both the explanation of peculiarities of the interphase boundary motion at a cellular decomposition and the determination of the concentration profiles across the interphase boundaries, segregation coefficient, and energy dissipation rate in dependence on the interphase boundary velocity. The suggested model is applied for the Pb—Sn system.

Key words: diffusion, grain boundary migration, solute drag, cellular precipitation, energy dissipation.

URL: http://mfint.imp.kiev.ua/en/abstract/v37/i12/1619.html

DOI: https://doi.org/10.15407/mfint.37.12.1619

PACS: 61.72.Bb, 64.70.kd, 64.75.Jk, 64.75.Nx, 66.30.-h, 68.35.-p, 81.30.Mh

Citation: Yu. O. Lyashenko, S. I. Derevyanko, and O. A. Shmatko, Determination of Segregation Influence on the Motion of the Interphase Boundaries During Cellular Precipitation, Metallofiz. Noveishie Tekhnol., 37, No. 12: 1619—1632 (2015) (in Ukrainian)

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