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Nitride Precipitation on Particles in Fe-10 mass % Ni Alloy Deoxidized with Ti, M (M=Mg, Zr and Ce) and Ti/M
2009 (English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 49, no 2, 229-238 p.Article in journal (Refereed) Published
Abstract [en]

The precipitation of nitrides on deoxidation particles in an Fe-10mass%Ni alloy containing 30 similar to 130 ppm O and 14 similar to 22 ppm N has been studied in the experiments where an alloy was deoxidized with Ti, M (M=Mg, Zr and Ce) and Ti/M at 1600 degrees C and then cooled to 1200 degrees C, followed by holding for 0 and 60 min before quenching. The total number of particles above 0.1 mu m remains almost constant except in Ti deoxidation, but the proportion of cubic particles which correspond to nitrides and oxide-nitrides increases during holding at 1200 degrees C in Ti, Zr, Ti/Mg and Ti/Zr deoxidations. In 0.05% (initial amount) Ti deoxidation, the number of TiN and TiN+TiOx particles increases during holding. In 0.03%Ti/0.1%Mg deoxidation, the number of TiOx-TiN particles decreases and the number of MgO-TiN and MgO-Ti(O, N) particles increases during holding due to the reduction of TiOx with soluble Mg. In 0.03%Ti/0.04%Zr deoxidation, the number of ZrO2 particles significantly decreases during holding due to the precipitation of TiN and ZrN on Zr oxides and formation of Zr(O, N)-Ti(O, N) particles. In the cases of Ti/0.08%Zr and Ti/0.12%Ce deoxidations, most of particles at 0 and 60 min of holding are ZrO2 and Zr(O, N) and Ce2O3 oxides, respectively, because the FeO-TiOx oxide in particles is reduced completely by dissolved Zr and Ce.

Place, publisher, year, edition, pages
2009. Vol. 49, no 2, 229-238 p.
Keyword [en]
heterogeneous precipitation, TiN, ZrN, complex deoxidation, Ti, Zr, Mg, Ce
National Category
Metallurgy and Metallic Materials Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-32493DOI: 10.2355/isijinternational.49.229ISI: 000263805900012Scopus ID: 2-s2.0-66249123594OAI: oai:DiVA.org:kth-32493DiVA: diva2:410847
Note
QC 20110415Available from: 2011-04-15 Created: 2011-04-15 Last updated: 2017-12-11Bibliographically approved

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Karasev, Andrey V.
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