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An improved method for determining the continuous cooling transformation diagram of C‐Mn steels
Author(s) -
Mesplont Christophe,
Zhao Jiu Zou,
Vandeputte Sven,
De Cooman Bruno C.
Publication year - 2001
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.200100115
Subject(s) - austenite , continuous cooling transformation , transformation (genetics) , metallurgy , diagram , thermodynamics , phase diagram , materials science , decomposition , phase (matter) , isothermal transformation diagram , range (aeronautics) , bainite , chemistry , mathematics , microstructure , physics , composite material , statistics , biochemistry , gene , organic chemistry
Dilatometry is often used to study the decomposition of austenite in steels, but the analysis of dilatometric data is often limited to the determination of transformation temperatures. The well‐known lever rule is not applicable when more than one phase transformation occurs. A model accounting for the carbon partitioning effects was developed to extract the phase transformation kinetics of a C‐Mn steel cooled using a wide range of cooling rates. The model is shown to be suitable to analyze the phase transformations in C‐Mn steels and it can be used to obtain a detailed CCT diagram for those steels.