The phase-field approach and solute drag modeling of the transition to massive γ → α transformation in binary Fe-C alloys / Loginova I., Odqvist J., Amberg G., Ågren J. // Acta Materialia. - 2003. - V. 51, l. 5. - P. 1327-1339.

ISSN:

13596454

Type:

Article

Abstract:

The transition between diffusion controlled and massive transformation γ → α in Fe-C alloys is investigated by means of phase-field simulations and thermodynamic functions assessed by the Calphad technique as well as diffusional mobilities available in the literature. A gradual variation in properties over an incoherent interface, having a thickness around 1 nm, is assumed. The phase-field simulations are compared with a newly developed technique to model solute drag during phase transformations. Both approaches show qualitatively the same behavior and predict a transition to a massive transformation at a critical temperature below the T0 line and close to the α/α + γ phase boundary. It is concluded that the quantitative difference between the two predictions stems from different assumptions on how the properties vary across the phase interface yielding a lower dissipation of Gibbs energy by diffusion in the phase-field simulations. The need for more detailed information about the actual variation in interfacial properties is emphasized. © 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

Author keywords:

Diffusion; Dissipation; Gibbs energy; Interfacial properties; Thermodynamics

Index keywords:

Binary alloys; Computer simulation; Diffusion; Gibbs free energy; Interfaces (materials); Phase transitions; Thermodynamics; Interfacial properties; Iron alloys

DOI:

10.1016/S1359-6454(02)00527-X

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037436766&doi=10.1016%2fS1359-6454%2802%2900527-X&partnerID=40&md5=6fdfd1261147cc43f0930d8e195ec68f

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037436766&doi=10.1016%2fS1359-6454%2802%2900527-X&partnerID=40&md5=6fdfd1261147cc43f0930d8e195ec68f
Affiliations	Department of Mechanics, KTH, 100 44 Stockholm, Sweden; Dept. of Mat. Sci. and Engineering, KTH, 100 44 Stockholm, Sweden
Author Keywords	Diffusion; Dissipation; Gibbs energy; Interfacial properties; Thermodynamics
References	Hillert, M., (2002) Metall. Mater. Trans., 33 A, pp. 2299-2308; Hillert, M., Sundman, B., (1977) Acta Met., 25 (11); Ågren, J., (1989) Acta Met., 37, p. 181; Liu, Z.-K., Ågren, J., (1989) Acta Met., 37, p. 3157; Loginova, I., Amberg, G., Ågren, J., (2001) Acta Mater., 49, p. 573; Artemev, A., Jin, Y., Khachaturyan, A.G., (2001) Acta Mater., 49, p. 1165; Ahmad, N.A., Wheeler, A.A., Boettinger, W.J., McFadden, G.B., (1998) Phys. Rev. E, 58, pp. 3436-3450; Gustafson, P., (1985) Scand. J. Metall., 14, p. 259; Cahn, J.W., Allen, S.M., (1977) J. Phys. (Paris) Colloque, C7, pp. 7-C51; Andersson, J.-O., Ågren, J., (1992) J. Appl. Phys., 72, p. 1350; Ågren, J., (1982) Acta Met., 30, p. 841; Ågren, J., (1986) Scripta Met., 20, p. 1507; Hillert, M., (1998) Phase Equilibria, Phase Diagrams and Phase Transformations - Their Thermodynamic Basis, , Cambridge, UK: Cambridge University Press; Borgenstam, A., Engström, A., Höglund, L., Ågren, J., (2000) J. Phase Equilibria, 21, p. 269; Enomoto, M., (1999) Acta Mater., 47, p. 3533; Boettinger, W.J., Warren, J.W., (1995) Acta Metall. Mater., 43, p. 689; Gear, C.W., (1971) Numerical Initial Value Problems in Ordinary Differential Equations, , Englewood Cliffs, NJ: Prentice-Hall; HARWELL Subroutine Library Specification, , Computer Science and Systems Division, HARWELL Laboratory, Oxfordshire OX11 0RA, UK; Hillert, M., (1975) Metall. Trans. A, 6 A, p. 5
Correspondence Address	Odqvist, J.; Dept. of Mat. Sci. and Engineering, KTH, 100 44 Stockholm, Sweden; email: joakim@met.kth.se
Language of Original Document	English
Abbreviated Source Title	Acta Mater
Source	Scopus