Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 49A, Issue 5, Pages 1598-1603Publisher
SPRINGER
DOI: 10.1007/s11661-018-4524-4
Keywords
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Funding
- Grant Agency of the Czech Republik [16-05608S]
- Institutional Endowment for the Long Term Conceptual Development of Research Institutes (at the Technical University of Liberec) by the Ministry of Education, Youth and Sports of the Czech Republic
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The microstructural and high-temperature mechanical properties of Fe-26Al-xNb (x = 3 and 5 at. pct) are compared. The alloys were investigated as cast and after hot rolling at 1473 K (1200 A degrees C). Scanning electron microscopes equipped with EDS and EBSD were used for the microstructure and phase identification. The addition of 3 at. pct of Nb into the Fe3Al matrix leads to the formation of C14 lambda-Laves phase (Fe,Al)(2)Nb (LP) particles spread in the Fe3Al matrix, while an eutectic with thin lamellae of LP C14 lambda-Laves phase (Fe,Al)(2)Nb and matrix is also formed in the iron aluminide with 5 at. pct of Nb. The presence of incoherent precipitates is connected with the enhancement of the high-temperature strength and creep resistance.
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