Modelling of Nb influence on phase transformation behaviours from austenite to ferrite in low carbon steels - LW final.pdf (465.57 kB)
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Modelling of Nb influence on phase transformation behaviours from austenite to ferrite in low carbon steels

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journal contribution
posted on 26.07.2016, 10:16 authored by Li Wang, Sally V. Parker, Andrew J. Rose, G.D. West, Rachel ThomsonRachel Thomson
In this paper, a new model has been developed to predict the phase transformation behaviours from austenite to ferrite in Nb-containing low carbon steels. The new model is based on some previous work and incorporates the effects of Nb on phase transformation behaviours, in order to make it applicable for Nb-containing steels. Dissolved Nb atoms segregated at prior austenite grain boundaries increase the critical energy for ferrite nucleation, and thus the ferrite nucleation rate is decreased. Dissolved Nb atoms also apply a solute drag effect to the moving transformation interface, and the ferrite grain growth rate is also decreased. The overall transformation kinetics is then calculated according to the classic Johnson–Mehl–Avrami–Kolmogorov (JMAK) theory. The new model predictions are quite consistent with experimental results for various steels during isothermal transformations or continuous cooling.

Funding

The authors gratefully thank Tata Steel UK Limited and Loughborough University for funding this work.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING

Volume

24

Issue

3

Pages

? - ? (12)

Citation

WANG, L. ... et al., 2016. Modelling of Nb influence on phase transformation behaviours from austenite to ferrite in low carbon steels. Modelling and Simulation in Materials Science and Engineering, 24 (3), 035016

Publisher

© IOP

Version

AM (Accepted Manuscript)

Publication date

2016-03-16

Notes

This is an author-created, un-copyedited version of an article published in Modelling and Simulation in Materials Science and Engineering. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/0965-0393/24/3/035016.

ISSN

0965-0393

eISSN

1361-651X

Language

en