Innovative Powder Processing of Oxide Dispersion Strengthened ODS Ferritic Stainless Steels

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An innovative gas atomization reaction synthesis technique was employed as a viable method to dramatically lower the processing cost for precursor oxide dispersion forming ferritic stainless steel powders (i.e., Fe-Cr-(Hf,Ti)-Y). During this rapid solidification process the atomized powders were enveloped by a nano-metric Cr-enriched metastable oxide film. Elevated temperature heat treatment was used to dissociate this metastable oxide phase through oxygen exchange reactions with Y-(Hf,Ti) enriched intermetallic compound precipitates. These solid state reactions resulted in the formation of highly stable nano-metric mixed oxide dispersoids (i.e., Y-Ti-O or Y-Hf-O) throughout the alloy microstructure. Subsequent high temperature (1200 C) heat treatments were ... continued below

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Rieken, Joel; Anderson, Iver & Kramer, Matthew April 1, 2011.

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  • Ames Laboratory
    Publisher Info: Ames Laboratory (AMES), Ames, IA (United States)
    Place of Publication: Ames, Iowa

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An innovative gas atomization reaction synthesis technique was employed as a viable method to dramatically lower the processing cost for precursor oxide dispersion forming ferritic stainless steel powders (i.e., Fe-Cr-(Hf,Ti)-Y). During this rapid solidification process the atomized powders were enveloped by a nano-metric Cr-enriched metastable oxide film. Elevated temperature heat treatment was used to dissociate this metastable oxide phase through oxygen exchange reactions with Y-(Hf,Ti) enriched intermetallic compound precipitates. These solid state reactions resulted in the formation of highly stable nano-metric mixed oxide dispersoids (i.e., Y-Ti-O or Y-Hf-O) throughout the alloy microstructure. Subsequent high temperature (1200 C) heat treatments were used to elucidate the thermal stability of each nano-metric oxide dispersoid phase. Transmission electron microscopy coupled with X-ray diffraction was used to evaluate phase evolution within the alloy microstructure.

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  • PowderMet 2011, San Francisco, CA, May 18-21, 2011

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  • Report No.: IS-M 963
  • Grant Number: DE-AC02-07CH11358
  • Office of Scientific & Technical Information Report Number: 1024638
  • Archival Resource Key: ark:/67531/metadc836480

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • April 1, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 4:02 p.m.

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Rieken, Joel; Anderson, Iver & Kramer, Matthew. Innovative Powder Processing of Oxide Dispersion Strengthened ODS Ferritic Stainless Steels, article, April 1, 2011; Ames, Iowa. (digital.library.unt.edu/ark:/67531/metadc836480/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.