On the formation of Widmanstätten ferrite in binary Fe-C - Phase-field approach / Loginova I., Ågren J., Amberg G. // Acta Materialia. - 2004. - V. 52, l. 13. - P. 4055-4063.

ISSN:

13596454

Type:

Article

Abstract:

A phase-field method, based on a Gibbs energy functional, is formulated for γ→α transformation in Fe-C. The derived phase-field model reproduces the following important types of phase transitions: from C diffusion controlled growth through Widmanstätten microstructures to massive growth without partitioning of C. Applying thermodynamic functions assessed by the Calphad technique and diffusional mobilities available in the literature, we study two-dimensional growth of ferrite side plates emanating from an austenite grain boundary. The morphology of the ferrite precipitates is defined by a highly anisotropic interfacial energy. As large values of anisotropy lead to an ill-posed phase-field equation we present a regularization method capable of circumvent non-differentiable domains of interfacial energy. © 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Author keywords:

Diffusion; Morphological instability; Phase-field method; Widmanstätten plates

Index keywords:

Anisotropy; Austenite; Cooling; Crystallization; Diffusion; Gibbs free energy; Grain boundaries; Heat conduction; Interfacial energy; Metallurgy; Microstructure; Nucleation; Phase transitions; Massive

DOI:

10.1016/j.actamat.2004.05.033

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-3042710965&doi=10.1016%2fj.actamat.2004.05.033&partnerID=40&md5=89290d34cc555a17a735d5c1ef2a2dac

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-3042710965&doi=10.1016%2fj.actamat.2004.05.033&partnerID=40&md5=89290d34cc555a17a735d5c1ef2a2dac
Affiliations	Department of Mechanics, KTH, S-100 44 Stockholm, Sweden; Dept. of Mat. Sci. and Engineering, KTH, S-100 44 Stockholm, Sweden
Author Keywords	Diffusion; Morphological instability; Phase-field method; Widmanstätten plates
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Correspondence Address	Loginova, I.; Department of Mechanics, KTH, S-100 44 Stockholm, Sweden; email: irina@mech.kth.se
Language of Original Document	English
Abbreviated Source Title	Acta Mater
Source	Scopus