Role of Y-Al Oxides During Extended Recovery Process of a Ferritic ODS Alloy

The microstructural stability of Y-Al oxides during the recrystallization of Fe-Cr-Al oxide dispersion strengthened alloy is studied in this work. The goal is to determine the specific distribution pattern of oxides depending where they are located: in the matrix or at the grain boundaries. It was c...

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Bibliographic Details
Published in:JOM (1989) 2015-10, Vol.67 (10), p.2208-2215
Main Authors: Capdevila, C., Pimentel, G., Aranda, M. M., Rementeria, R., Dawson, K., Urones-Garrote, E., Tatlock, G. J., Miller, M. K.
Format: Article
Language:English
Subjects:
Alloys
Aluminum alloys
Chemistry/Food Science
Corrosion resistance
Crystal structure
Crystallization
Earth Sciences
Engineering
Environment
Grain boundaries
Grain growth
Heat
Heat treating
MATERIALS SCIENCE
Microstructure
Morphology
Physics
Studies
Temperature
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Summary:The microstructural stability of Y-Al oxides during the recrystallization of Fe-Cr-Al oxide dispersion strengthened alloy is studied in this work. The goal is to determine the specific distribution pattern of oxides depending where they are located: in the matrix or at the grain boundaries. It was concluded that those located at the grain boundaries yielded a faster coarsening than the ones in the matrix, although no significant differences in composition and/or crystal structure were observed. However, the recrystallization heat treatment leads to the dissolution of the Y 2 O 3 and its combination with Al to form the YAlO 3 perovskite oxide particles process, mainly located at the grain boundaries. Finally, atom probe tomography analysis revealed a significant Ti build-up at the grain boundaries that might affect subsequent migration during recrystallization.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-015-1559-5