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 journalArticle

2 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 languageEnglish
Pages (from-to)257-265
Number of pages9
JournalComputational Materials Science
Volume137
Early online date9 Jun 2017
DOIs
Publication statusPublished - 1 Sep 2017
Externally publishedYes

Keywords

  • CALPHAD
  • High strength steel
  • Interphase precipitation
  • Phase-field

ASJC Scopus subject areas

  • Computer Science(all)
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Computational Mathematics

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