A phase-field model for interphase precipitation in V-micro-alloyed structural steels

Alireza Rahnama; Samuel Clark; Vit Janik; Seetharaman Sridhar

doi:10.1016/j.commatsci.2017.05.037

A phase-field model for interphase precipitation in V-micro-alloyed structural steels

Alireza Rahnama, Samuel Clark, Vit Janik, Seetharaman Sridhar

University of Warwick

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	257-265
Number of pages	9
Journal	Computational Materials Science
Volume	137
Early online date	9 Jun 2017
DOIs	https://doi.org/10.1016/j.commatsci.2017.05.037
Publication status	Published - 1 Sept 2017
Externally published	Yes

Keywords

CALPHAD
High strength steel
Interphase precipitation
Phase-field

ASJC Scopus subject areas

General Computer Science
General Chemistry
General Materials Science
Mechanics of Materials
General Physics and Astronomy
Computational Mathematics

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10.1016/j.commatsci.2017.05.037

http://wrap.warwick.ac.uk/88618/Licence: CC BY-NC-ND

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title = "A phase-field model for interphase precipitation in V-micro-alloyed structural steels",

abstract = "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.",

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AU - Rahnama, Alireza

AU - Clark, Samuel

AU - Janik, Vit

AU - Sridhar, Seetharaman

PY - 2017/9/1

Y1 - 2017/9/1

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

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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 -

A phase-field model for interphase precipitation in V-micro-alloyed structural steels

Abstract

Keywords

ASJC Scopus subject areas

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