Aluminum Deoxidation Equilibrium of Fe-Ni Alloy at 1773 K and 1873 K

Hiroshi Fukaya, Koji Kajikawa, Annelies Malfliet, Bart Blanpain, Muxing Guo

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The aluminum deoxidation equilibrium in molten Fe-36 mass pct Ni and Fe-46 mass pct Ni alloys was experimentally determined at 1773 K and 1873 K to obtain the thermodynamic parameters around the liquidus temperature, which is required to predict the deoxidation reaction for the ingot-casting process. Automatic SEM-EDS inclusion analysis was performed to estimate the undissolved oxygen content. Thermodynamic analysis on Al deoxidation was carried out using Miki and Hino’s formula, which is based on Darken’s quadratic formalism and the Redlich–Kister polynomial. From the composition dependence of the apparent equilibrium constant in Fe-Ni alloy, the necessity of the third-order interaction parameter of Ni-Al was found. Then, the interaction parameters of Fe-Al, Al-O and Ni-Al were evaluated.

Original languageEnglish
Pages (from-to)2389-2399
Number of pages11
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume49
Issue number5
DOIs
Publication statusPublished - 2018 Oct 1

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