Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102156
Title: Autocatalytic Mechanism of Pearlite Transformation in Steel
Authors: Razumov, I. K.
Gornostyrev, Y. N.
Katsnelson, M. I.
Issue Date: 2017
Publisher: American Physical Society
Citation: Razumov I. K. Autocatalytic Mechanism of Pearlite Transformation in Steel / I. K. Razumov, Y. N. Gornostyrev, M. I. Katsnelson. — DOI 10.1103/PhysRevApplied.7.014002 // Physical Review Applied. — 2017. — Vol. 7. — Iss. 1. — 014002.
Abstract: A model of pearlite colony formation in carbon steels is developed, with a parametrization based on ab initio calculations. The model describes the processes of decomposition of austenite and formation of cementite through a metastable intermediate structure, with a crucial role of ferromagnetic order arising under the cooling. The autocatalytic mechanism of pearlite colony formation is analyzed and conditions for its implementation are established. We demonstrate that pearlite with lamellar structure is formed by the autocatalytic mechanism when thermodynamic equilibrium between the initial phase (austenite) and the products of its decomposition (cementite and ferrite) cannot be reached. The transformation diagram is suggested, and various scenarios of decomposition kinetics are investigated by phase-field simulations. By using a model expression for the free energy with first-principles parametrization, we find conditions of the formation of both lamellar and globular structures, in good agreement with experimental data. © 2017 American Physical Society.
Keywords: AUSTENITE
CALCULATIONS
CARBIDES
FREE ENERGY
LAMELLAR STRUCTURES
PEARLITE
AB INITIO CALCULATIONS
DECOMPOSITION KINETICS
FERROMAGNETIC ORDERINGS
GLOBULAR STRUCTURE
METASTABLE INTERMEDIATE
PHASE-FIELD SIMULATION
THERMODYNAMIC EQUILIBRIA
TRANSFORMATION DIAGRAMS
PEARLITIC TRANSFORMATIONS
URI: http://hdl.handle.net/10995/102156
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85013343995
PURE ID: 1479689
ISSN: 23317019
DOI: 10.1103/PhysRevApplied.7.014002
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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