Publication
Title
A transition from local equilibrium to paraequilibrium kinetics for ferrite growth in FeCMn : a possible role of interfacial segregation
Author
Abstract
Ferrite growth kinetics was measured under highly controlled decarburization conditions in an Fe0.94%Mn0.57%C (mass%) alloy. The observed growth kinetics closely followed the predictions of the local equilibrium non-partitioning (LE-NP) model over the temperature range 725775 °C. A transition from LE-NP to paraequilibrium (PE) kinetics was observed, for the first time, as the temperature was increased from 775 °C to 825 °C. Long-lived parabolic kinetic states that are intermediate between LE-NP and PE were observed at these intermediate temperatures. Above 825 °C, ferrite growth appeared to follow the predictions of the PE model up to the T0 temperature at which ferrite growth stopped. These novel results are attributed to the segregation of Mn to the moving interface. It is thought that this process has the effect of decreasing the Mn concentration on the austenite side of the interface and, consequently, extending the PE state.
Language
English
Source (journal)
Acta materialia. - Oxford
Publication
Oxford : 2008
ISSN
1359-6454
DOI
10.1016/J.ACTAMAT.2008.01.016
Volume/pages
56 :10 (2008) , p. 2203-2211
ISI
000256939800004
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
Publication type
Subject
External links
Web of Science
Record
Identifier
Creation 04.11.2016
Last edited 22.02.2023
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