Microstructure and High Temperature Oxidation Behavior of Cr-W Alloys

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Cr alloys containing 0-30%W by weight were investigated for use in elevated temperature applications. The alloys were melted in a water-cooled, copper-hearth arc furnace. Microstructure of the alloys was characterized using x-ray diffraction, scanning electron microscopy, and light microscopy. A pseudocyclic oxidation test was employed to study scale formation at 1000ºC in dry air. The scale was predominantly chromia and spalled upon cooling. Alloying with aluminum up to 8 weight percent reduced the spalling drastically. Furthermore, aluminizing the surface of the Cr-W alloys completely stopped the spalling.

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Dogan, O.N. February 1, 2007.

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Cr alloys containing 0-30%W by weight were investigated for use in elevated temperature applications. The alloys were melted in a water-cooled, copper-hearth arc furnace. Microstructure of the alloys was characterized using x-ray diffraction, scanning electron microscopy, and light microscopy. A pseudocyclic oxidation test was employed to study scale formation at 1000ºC in dry air. The scale was predominantly chromia and spalled upon cooling. Alloying with aluminum up to 8 weight percent reduced the spalling drastically. Furthermore, aluminizing the surface of the Cr-W alloys completely stopped the spalling.

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Not published other than slide presentation only

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  • Refractory Metals 2007, a symposium at the 136th TMS Annual Meeting, Orlando, FL, Feb. 25-Mar. 1, 2007

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  • Report No.: DOE/NETL-IR-2007-080
  • Grant Number: None cited
  • Office of Scientific & Technical Information Report Number: 912976
  • Archival Resource Key: ark:/67531/metadc889219

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  • February 1, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 4, 2016, 2:09 p.m.

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Dogan, O.N. Microstructure and High Temperature Oxidation Behavior of Cr-W Alloys, article, February 1, 2007; Pittsburgh, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc889219/: accessed April 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.