Aluminum-Titanium Complex Deoxidation Equilibria in Fe-Cr-Al-Ti-O Melts

Min Paek, Jung-Mock Jang, Jong-Oh Jo, Lauri Holappa, Jong-Jin Pak*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Al-Ti complex deoxidation equilibria in high Cr stainless steels were studied by measuring the thermodynamic behavior of O in the Fe-Cr-Al-O, Fe-Cr-Ti-O, and Fe-Cr-Al-Ti-O melts. The present deoxidation experiments were thermodynamically analyzed along with available data in the literature using Wagner’s formalism. The compatible set of parameters for the multicomponent Fe-Cr-Al-Ti-O system was selected, and its applicable concentration and temperature limits were discussed. The parameter set successfully reproduced the present experimental results and literature data of deoxidation equilibria in the Fe-Cr-Al-O and Fe-Cr-Ti-O alloy melts over the wide Cr concentration up to 40 mass pct at 1823 K to 1996 K (1550 °C to 1723 °C). The validity of the parameters was also checked by carrying out the Al-Ti complex deoxidation experiments with the construction of the predominance diagram for inclusions in the Fe-Cr-Al-Ti-O melts at 1873 K (1600 °C).
Original languageEnglish
Number of pages9
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
DOIs
Publication statusE-pub ahead of print - 4 Nov 2020
MoE publication typeA1 Journal article-refereed

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