Influence of Hot Consolidation Conditions and Cr-Alloying on Microstructure and Creep in New-Generation ODS Alloy at 1100 °C

oleh: Jiří Svoboda, Natália Luptáková, Milan Jarý, Petr Dymáček

Format: Article
Diterbitkan: MDPI AG 2020-11-01

Deskripsi

The coarse-grained new-generation Fe-Al-Y<sub>2</sub>O<sub>3</sub>-based oxide dispersion strengthened (ODS) alloys contain 5 vol.% homogeneously dispersed yttria nano-precipitates and exhibit very promising creep and oxidation resistance above 1000 °C. The alloy is prepared by the consolidation of mechanically alloyed powders via hot rolling followed by secondary recrystallization. The paper presents a systematic study of influence of rolling temperature on final microstructure and creep at 1100 °C for two grades (Fe-10Al-4Y<sub>2</sub>O<sub>3</sub> and Fe-9Al-14Cr-4Y<sub>2</sub>O<sub>3</sub> in wt%) of new-generation ODS alloys. The hot rolling temperatures exhibit a rather wide processing window and the influence of Cr-alloying on creep properties is evaluated as only slightly positive.