TY - JOUR
T1 - A phase-field model for interphase precipitation in V-micro-alloyed structural steels
AU - Rahnama, Alireza
AU - Clark, Samuel
AU - Janik, Vit
AU - Sridhar, Seetharaman
N1 - Funding Information:
We would like to thank Michael Green and Jonathan Evans for helpful discussions. O.S. would like to thank the PPARC for financial support.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/9
Y1 - 2017/9
N2 - A multi-component phase field model was developed based on CALPHAD method and directly coupled with the CALPHAD thermodynamic database using a four-sublattice model. Interphase carbide precipitation at the γ/α interface is simulated and the predictions are tested against reported experimental results for a medium carbon, vanadium micro-alloyed steel during an isothermal γ→α+MC transformation at 973 K. The model is found to be able to accurately predict: interphase precipitate composition, morphology and size of the precipitates. Furthermore, the tip-to-tip pairing of interphase precipitates in γ/α interphase boundaries is elucidated and found to be attributable to the minimisation of interfacial energy.
AB - A multi-component phase field model was developed based on CALPHAD method and directly coupled with the CALPHAD thermodynamic database using a four-sublattice model. Interphase carbide precipitation at the γ/α interface is simulated and the predictions are tested against reported experimental results for a medium carbon, vanadium micro-alloyed steel during an isothermal γ→α+MC transformation at 973 K. The model is found to be able to accurately predict: interphase precipitate composition, morphology and size of the precipitates. Furthermore, the tip-to-tip pairing of interphase precipitates in γ/α interphase boundaries is elucidated and found to be attributable to the minimisation of interfacial energy.
KW - CALPHAD
KW - High strength steel
KW - Interphase precipitation
KW - Phase-field
UR - http://www.scopus.com/inward/record.url?scp=85020462494&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85020462494&partnerID=8YFLogxK
U2 - 10.1016/j.commatsci.2017.05.037
DO - 10.1016/j.commatsci.2017.05.037
M3 - Article
AN - SCOPUS:85020462494
SN - 0927-0256
VL - 137
SP - 257
EP - 265
JO - Computational Materials Science
JF - Computational Materials Science
ER -