Experimental measurements and numerical analysis of al deoxidation equilibrium of molten Fe-Cr-Ni Alloy

Hiroshi Fukaya, Seika Nakajima, Jonah Gamutan, Shigeru Suzuki, Koji Kajikawa, Ken Saito, Takahiro Miki

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The aluminum deoxidation equilibrium in molten Fe-10 to 40mass%Cr-8mass%Ni and Fe-18mass%Cr-8 to 30mass%Ni alloys was experimentally determined at 1 873 K and 1 773 K to obtain the thermodynamic parameters at both temperatures, corresponding to the refining and casting processes, respectively. Thermodynamic analysis on Al deoxidation was carried out based on the sub-regular solution model using a Redlich-Kister type polynomial. Fe-Al, Ni-Al, Cr-Al and Fe-Cr-Ni interaction parameters were obtained from experimental results and a thermodynamic assessment. Using these parameters, the Al deoxidation equilibrium over the complete composition range of the Fe-Ni alloy and in more than 50mass%Fe of the Fe-Cr and Fe-Cr-Ni alloys can be calculated for the temperature ranges of both of the refining and casting processes.

Original languageEnglish
Pages (from-to)2331-2339
Number of pages9
JournalISIJ International
Volume61
Issue number9
DOIs
Publication statusPublished - 2021

Keywords

  • Activity
  • Aluminum deoxidation equilibrium
  • Excess free Gibbs energy
  • Fe-Cr-Ni alloy
  • Quadratic formalism
  • Redlich-Kister polynomial
  • Sub-regular solution model: inclusion
  • Thermodynamics

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