Calculation of phase equilibria between austenite and (Nb, Ti, V)(C, N) in microalloyed steels

K. Inoue, N. Ishikawa, Ikuo Ohnuma, H. Ohtani, K. Ishida

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

Thermodynamic calculations of the phase equilibria between austenite (γ) and complex carbonitrides containing Nb, Ti and V, (Nb, Ti, V)(C, N), were performed. The solubility product and formation energy of each carbide and nitride as well as the interaction parameters between components were evaluated. Experimental investigation on phase separation in the complex carbonitrides was also carried out using STEM-EDX and X-ray diffraction. The immiscibility of carbonitride was found to strongly affect the phase equilibria even when the content of microalloying elements in IF steels was very low.

Original languageEnglish
Pages (from-to)175-182
Number of pages8
JournalIsij International
Volume41
Issue number2
DOIs
Publication statusPublished - 2001 Jan 1

Keywords

  • Carbide
  • IF steel
  • Microalloyed steels
  • Nitride
  • Phase separation
  • Solubility product
  • Thermodynamic analysis

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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