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

Alireza Rahnama, Samuel Clark, Vit Janik, Seetharaman Sridhar

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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 languageEnglish (US)
Pages (from-to)257-265
Number of pages9
JournalComputational Materials Science
StatePublished - Sep 2017
Externally publishedYes


  • 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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