High-temperature oxidation behavior of nano-structured ferritic oxide dispersion-strengthened alloys

Jeoung Han Kim, Kyong Min Kim, Thak Sang Byun, Dong Won Lee, Chan Hee Park

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19 Scopus citations

Abstract

The effect of yttrium and nanoclusters on the high-temperature oxidation behavior of Fe-14Cr-3W-0.4Ti nano-structured ferritic oxide dispersion- strengthened alloys was investigated. For comparison purposes, conventional stainless steels with the same chemical composition were studied as well. Long-term oxidation tests were conducted at 800 C for up to 2000 h in atmospheric air. The mass-gain versus time curves were obtained and the microstructure and chemical elements distribution in different regions of the specimens after oxidation were then analyzed by SEM/EDS and XRD. The experimental results showed that an addition of yttrium to Fe-14C-3W-0.4Ti alloy sufficiently reduced the oxidation rate. However, ODS processing to precipitate nanoclusters is a more effective means of improving high-temperature oxidation rather than a simple yttrium addition.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalThermochimica Acta
Volume579
DOIs
StatePublished - Mar 10 2014

Keywords

  • Ball milling
  • Grain size
  • Nanoparticle
  • Oxidation
  • Oxide dispersion-strengthened alloy
  • Yttrium

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