Modelling the austenite to ferrite phase transformation in low carbon steels in terms of the interface mobility

Citation
Ta. Kop et al., Modelling the austenite to ferrite phase transformation in low carbon steels in terms of the interface mobility, ISIJ INT, 40(7), 2000, pp. 713-718
Citations number
18
Categorie Soggetti
Metallurgy
Journal title
ISIJ INTERNATIONAL
ISSN journal
09151559 → ACNP
Volume
40
Issue
7
Year of publication
2000
Pages
713 - 718
Database
ISI
SICI code
0915-1559(2000)40:7<713:MTATFP>2.0.ZU;2-U
Abstract
The kinetics of the phase transformation between the high temperature FCC-p hase austenite and the low temperature BCC-phase ferrite as it occurs durin g controlled cooling of hot roiled low carbon steels is described using a p hysical model that considers austenite grain size, nucleus density, composi tion effects, and the austenite/ferrite interface mobility. The model is ve rified against experimental dilatometry data for three lean carbon-manganes e steel grades. The model yields adequate reproductions of the transformati on kinetics. Ferrite grain coarsening during the transformation appears to have a significant effect on the final microstructure.