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Title: Kinetics of the eutectoid colony growth in a solid solution for simple alloy models

Abstract

A simple model, which reflects the main features of the phase equilibria between austenite, ferrite, and cementite, is proposed to study the growth kinetics of pearlite-type eutectoid colonies. The previously developed microscopic theory of diffusional phase transformations in alloys developed earlier is used to simulate steady-state colony growth for several versions of this model. The existing phenomenological approaches are found to describe the main features of the colony growth kinetics qualitatively correctly; however, these approaches are insufficient to draw quantitative conclusions. The changes in the colony front shape as temperature T approaches eutectic point T{sub e} and the structure of the interphase boundaries at various T are studied. At T near T{sub e}, the initial phase (austenite) is found to wet the boundaries between the forming phases (ferrite, cementite), which results in a sharp increase in the interphase boundary thickness and a decrease in the junction angle between the phases at the colony front. The differences in the diffusion mobilities of interstitial (carbon) atoms in different phases are shown to be important to adequately describe the colony growth kinetics.

Authors:
 [1]
  1. Russian Research Center Kurchatov Institute (Russian Federation)
Publication Date:
OSTI Identifier:
21241977
Resource Type:
Journal Article
Journal Name:
Journal of Experimental and Theoretical Physics
Additional Journal Information:
Journal Volume: 107; Journal Issue: 1; Other Information: DOI: 10.1134/S1063776108070091; Copyright (c) 2008 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7761
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AUSTENITE; CARBON; CEMENTITE; CRYSTAL GROWTH; EUTECTICS; FERRITE; INTERSTITIALS; KINETICS; PEARLITE; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; SOLID SOLUTIONS; STEADY-STATE CONDITIONS; THICKNESS

Citation Formats

Vaks, V. G., E-mail: vaks@mbslab.kiae.ru, and Stroev, A Yu. Kinetics of the eutectoid colony growth in a solid solution for simple alloy models. United States: N. p., 2008. Web. doi:10.1134/S1063776108070091.
Vaks, V. G., E-mail: vaks@mbslab.kiae.ru, & Stroev, A Yu. Kinetics of the eutectoid colony growth in a solid solution for simple alloy models. United States. https://doi.org/10.1134/S1063776108070091
Vaks, V. G., E-mail: vaks@mbslab.kiae.ru, and Stroev, A Yu. 2008. "Kinetics of the eutectoid colony growth in a solid solution for simple alloy models". United States. https://doi.org/10.1134/S1063776108070091.
@article{osti_21241977,
title = {Kinetics of the eutectoid colony growth in a solid solution for simple alloy models},
author = {Vaks, V. G., E-mail: vaks@mbslab.kiae.ru and Stroev, A Yu},
abstractNote = {A simple model, which reflects the main features of the phase equilibria between austenite, ferrite, and cementite, is proposed to study the growth kinetics of pearlite-type eutectoid colonies. The previously developed microscopic theory of diffusional phase transformations in alloys developed earlier is used to simulate steady-state colony growth for several versions of this model. The existing phenomenological approaches are found to describe the main features of the colony growth kinetics qualitatively correctly; however, these approaches are insufficient to draw quantitative conclusions. The changes in the colony front shape as temperature T approaches eutectic point T{sub e} and the structure of the interphase boundaries at various T are studied. At T near T{sub e}, the initial phase (austenite) is found to wet the boundaries between the forming phases (ferrite, cementite), which results in a sharp increase in the interphase boundary thickness and a decrease in the junction angle between the phases at the colony front. The differences in the diffusion mobilities of interstitial (carbon) atoms in different phases are shown to be important to adequately describe the colony growth kinetics.},
doi = {10.1134/S1063776108070091},
url = {https://www.osti.gov/biblio/21241977}, journal = {Journal of Experimental and Theoretical Physics},
issn = {1063-7761},
number = 1,
volume = 107,
place = {United States},
year = {Tue Jul 15 00:00:00 EDT 2008},
month = {Tue Jul 15 00:00:00 EDT 2008}
}