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11157 Performance of Alumina-Forming Austenitic Steels, Fe-base and Ni-base Alloys Exposed to Metal Dusting Environments

Picture for 11157 Performance of Alumina-Forming Austenitic Steels
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Product Number: 51300-11157-SG
ISBN: 2011 11157 CP
Author: Aurelie Vande Put, Kinga A. Unocic, Michael P. Brady and Bruce A. Pint
Publication Date: 2011
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$20.00
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A series of conventional Fe- and Ni- base, chromia- and alumina- forming alloys, and a newly developed creep-resistant, alumina-forming austenitic (AFA) steel were evaluated in metal dusting environments with a range of water vapor contents. Five 500h experiments have been performed at 650°C with different water vapor contents and total pressures. Without water vapor, the Ni-base alloys showed greater resistance to metal dusting than the Fe-base alloys, including AFA. However, with 10-28% water vapor, more protective behavior was observed with the higher-alloyed materials and only small mass changes were observed. Longer exposure times are in progress to further differentiate performance.

Keywords: metal dusting, Ni-base alloys, Fe-base alloys, oxidation testing, AFA alloys
A series of conventional Fe- and Ni- base, chromia- and alumina- forming alloys, and a newly developed creep-resistant, alumina-forming austenitic (AFA) steel were evaluated in metal dusting environments with a range of water vapor contents. Five 500h experiments have been performed at 650°C with different water vapor contents and total pressures. Without water vapor, the Ni-base alloys showed greater resistance to metal dusting than the Fe-base alloys, including AFA. However, with 10-28% water vapor, more protective behavior was observed with the higher-alloyed materials and only small mass changes were observed. Longer exposure times are in progress to further differentiate performance.

Keywords: metal dusting, Ni-base alloys, Fe-base alloys, oxidation testing, AFA alloys
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