Modeling of kinetics of isothermal idiomorphic ferrite formation in a medium-carbon vanadium-titanium microalloyed steel |
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Authors: | C Capdevila F G Caballero C García de Andrés |
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Affiliation: | (1) the Department of Physical Metallurgy, Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), E-28040 Madrid, Spain |
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Abstract: | The present article is concerned with the theoretical and experimental study of the growth kinetics of idiomorphic ferrite
in a medium-carbon vanadium-titanium microalloyed steel. A theoretical model is presented to calculate the evolution of isothermal
austenite-to-idiomorphic ferrite transformation with time for a given temperature. Moreover, the nature, size, and distribution
of the inclusions that are responsible for the intragranular nucleation of idiomorphic ferrite have been characterized by
scanning electron microscopy (SEM). Finally, the influence of austenite grain size in the isothermal decomposition of austenite
in idiomorphic ferrite has been thoroughly analyzed. An excellent agreement (higher than 90 pct in R
2) has been obtained between the experimental and predicted values of the volume fraction of idiomorphic ferrite. |
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