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

Authors
  • Svoboda, Jiří
  • Luptáková, Natália
  • Jarý, Milan
  • Dymáček, Petr
Type
Published Article
Journal
Materials
Publisher
MDPI AG
Publication Date
Nov 10, 2020
Volume
13
Issue
22
Identifiers
DOI: 10.3390/ma13225070
PMID: 33182818
PMCID: PMC7696533
Source
PubMed Central
Keywords
Disciplines
  • Article
License
Green

Abstract

The coarse-grained new-generation Fe-Al-Y2O3-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-4Y2O3 and Fe-9Al-14Cr-4Y2O3 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.

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