Characterization of the breakaway al content in alumina-forming alloys

B. A. Pint; L. R. Walker; I. G. Wright

doi:10.1179/mht.2004.021

Characterization of the breakaway al content in alumina-forming alloys

B. A. Pint, L. R. Walker, I. G. Wright

Materials Science and Technology Div

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

Residual Al contents were measured in Fe- and Ni-base alloys in order to improve lifetime prediction models based on the consumption of the Al reservoir. Measurements were made using electron probe microanalysis (EPMA) on both foil (50-125 μm thickness) and plate (0.5-2mm) material. For FeCrAl, NiCrAl and Fe₃Al plate specimens, significant Al concentration gradients were measured. An Al gradient is not considered in current reservoir type models. Residual Al contents at the onset of breakaway oxidation were somewhat lower than previously reported for several FeCrAl alloys and significantly higher (»10at.%) for Fe₃Al and Fe-Al alloys. The implications of these results for performance and lifetime predictions are discussed.

Original language	English
Pages (from-to)	175-185
Number of pages	11
Journal	Materials at High Temperatures
Volume	21
Issue number	3
DOIs	https://doi.org/10.1179/mht.2004.021
State	Published - 2004

Keywords

Alumina-forming alloys
Residual Al contents

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1179/mht.2004.021

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abstract = "Residual Al contents were measured in Fe- and Ni-base alloys in order to improve lifetime prediction models based on the consumption of the Al reservoir. Measurements were made using electron probe microanalysis (EPMA) on both foil (50-125 μm thickness) and plate (0.5-2mm) material. For FeCrAl, NiCrAl and Fe3Al plate specimens, significant Al concentration gradients were measured. An Al gradient is not considered in current reservoir type models. Residual Al contents at the onset of breakaway oxidation were somewhat lower than previously reported for several FeCrAl alloys and significantly higher (»10at.%) for Fe3Al and Fe-Al alloys. The implications of these results for performance and lifetime predictions are discussed.",

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AU - Walker, L. R.

AU - Wright, I. G.

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AB - Residual Al contents were measured in Fe- and Ni-base alloys in order to improve lifetime prediction models based on the consumption of the Al reservoir. Measurements were made using electron probe microanalysis (EPMA) on both foil (50-125 μm thickness) and plate (0.5-2mm) material. For FeCrAl, NiCrAl and Fe3Al plate specimens, significant Al concentration gradients were measured. An Al gradient is not considered in current reservoir type models. Residual Al contents at the onset of breakaway oxidation were somewhat lower than previously reported for several FeCrAl alloys and significantly higher (»10at.%) for Fe3Al and Fe-Al alloys. The implications of these results for performance and lifetime predictions are discussed.

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DO - 10.1179/mht.2004.021

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EP - 185

JO - Materials at High Temperatures

JF - Materials at High Temperatures

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ER -

Characterization of the breakaway al content in alumina-forming alloys

Abstract

Keywords

UN SDGs

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