Abstract
The method of calculation of diffusion flows under phase transformations in alloys iron - carbon - alloying element using the principles of nonequilibrium thermodynamics are developed. The expressions for calculation of cross-factors, motive forces and flows in the Onzager equations for a two-phase thermodynamic system, and an example of using the developed method are given.
Highlights
The phase transformations into the alloyed ironcarbon alloys are largely related to diffusion of components, foremost to the carbon [1, 2]
The method of calculation of diffusion flows under phase transformations in alloys iron - carbon - alloying element using the principles of nonequilibrium thermodynamics are developed
It is possible to use the mathematical methods of nonequilibrium thermodynamics
Summary
The phase transformations into the alloyed ironcarbon alloys are largely related to diffusion of components, foremost to the carbon [1, 2]. At consideration of the interrupted systems, id est systems, that contain a few phases the flows of elements and vacancies pass between that, as thermodynamics forces it is possible to use the eventual final drops of chemical potentials (-∆μi) [9,10]. That provides the possibility of growing in it a phase with a lower density carbide or intermetallic This condition can be executed as a result of iron flow growing due to cross kinetic coefficient of L21 [10]. Theory of phase transformations that is controlled by diffusion, develops successfully, see e.g. works [12-18], the calculation of diffusive flows on principles of nonequilibrium thermodynamics is not almost examined, because unknown values of cross coefficients. The aim of work is development of methodology of calculation of diffusive flows, kinetic coefficients and thermodynamics forces in triple alloys as iron - carbon alloying element that is based on principles of nonequilibrium thermodynamics
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