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Title: Microstructure and High Temperature Oxidation Behavior of Cr-W Alloys

Abstract

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.

Authors:
Publication Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Org.:
USDOE - Office of Fossil Energy (FE)
OSTI Identifier:
912976
Report Number(s):
DOE/NETL-IR-2007-080
TRN: US200802%%502
DOE Contract Number:  
None cited
Resource Type:
Conference
Resource Relation:
Conference: Refractory Metals 2007, a symposium at the 136th TMS Annual Meeting, Orlando, FL, Feb. 25-Mar. 1, 2007
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; ALUMINIUM; ARC FURNACES; MICROSCOPY; MICROSTRUCTURE; OXIDATION; REFRACTORY METALS; SCANNING ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Dogan, O N. Microstructure and High Temperature Oxidation Behavior of Cr-W Alloys. United States: N. p., 2007. Web.
Dogan, O N. Microstructure and High Temperature Oxidation Behavior of Cr-W Alloys. United States.
Dogan, O N. Thu . "Microstructure and High Temperature Oxidation Behavior of Cr-W Alloys". United States. doi:. https://www.osti.gov/servlets/purl/912976.
@article{osti_912976,
title = {Microstructure and High Temperature Oxidation Behavior of Cr-W Alloys},
author = {Dogan, O N},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 2007},
month = {Thu Feb 01 00:00:00 EST 2007}
}

Conference:
Other availability
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