Effect of Fe-Al substrate mechanical properties on alumina scale morphology

S. Dryepondt; B. A. Pint

doi:10.1016/j.msea.2008.07.005

Effect of Fe-Al substrate mechanical properties on alumina scale morphology

S. Dryepondt, B. A. Pint

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Abstract

The alumina scale formed on undoped iron aluminides (Fe-40Al and Fe-28Al-2Cr) was studied using scanning electron microscopy (SEM) and atomic force microscopy (AFM). For cast alloys, a convoluted scale was observed after exposures at 950° and 1000 °C. However, oxide dispersed Fe-28Al-2Cr formed a flat oxide after similar exposures. To clarify the role of the substrate, the high temperature mechanical properties of these materials were studied in tension and/or compression. The largest scale convolutions were observed on the material with the lowest 1000 °C yield stress, wrought Fe-28Al-2Cr, suggesting that substrate mechanical properties can explain the observed differences in scale morphology.

Original language	English
Pages (from-to)	224-230
Number of pages	7
Journal	Materials Science and Engineering: A
Volume	497
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2008.07.005
State	Published - Dec 15 2008

Keywords

Alumina scale
Creep strength
Dispersion strengthening
Iron aluminide
Morphology

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title = "Effect of Fe-Al substrate mechanical properties on alumina scale morphology",

abstract = "The alumina scale formed on undoped iron aluminides (Fe-40Al and Fe-28Al-2Cr) was studied using scanning electron microscopy (SEM) and atomic force microscopy (AFM). For cast alloys, a convoluted scale was observed after exposures at 950° and 1000 °C. However, oxide dispersed Fe-28Al-2Cr formed a flat oxide after similar exposures. To clarify the role of the substrate, the high temperature mechanical properties of these materials were studied in tension and/or compression. The largest scale convolutions were observed on the material with the lowest 1000 °C yield stress, wrought Fe-28Al-2Cr, suggesting that substrate mechanical properties can explain the observed differences in scale morphology.",

keywords = "Alumina scale, Creep strength, Dispersion strengthening, Iron aluminide, Morphology",

author = "S. Dryepondt and Pint, {B. A.}",

year = "2008",

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doi = "10.1016/j.msea.2008.07.005",

language = "English",

volume = "497",

pages = "224--230",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

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}

TY - JOUR

T1 - Effect of Fe-Al substrate mechanical properties on alumina scale morphology

AU - Dryepondt, S.

AU - Pint, B. A.

PY - 2008/12/15

Y1 - 2008/12/15

N2 - The alumina scale formed on undoped iron aluminides (Fe-40Al and Fe-28Al-2Cr) was studied using scanning electron microscopy (SEM) and atomic force microscopy (AFM). For cast alloys, a convoluted scale was observed after exposures at 950° and 1000 °C. However, oxide dispersed Fe-28Al-2Cr formed a flat oxide after similar exposures. To clarify the role of the substrate, the high temperature mechanical properties of these materials were studied in tension and/or compression. The largest scale convolutions were observed on the material with the lowest 1000 °C yield stress, wrought Fe-28Al-2Cr, suggesting that substrate mechanical properties can explain the observed differences in scale morphology.

AB - The alumina scale formed on undoped iron aluminides (Fe-40Al and Fe-28Al-2Cr) was studied using scanning electron microscopy (SEM) and atomic force microscopy (AFM). For cast alloys, a convoluted scale was observed after exposures at 950° and 1000 °C. However, oxide dispersed Fe-28Al-2Cr formed a flat oxide after similar exposures. To clarify the role of the substrate, the high temperature mechanical properties of these materials were studied in tension and/or compression. The largest scale convolutions were observed on the material with the lowest 1000 °C yield stress, wrought Fe-28Al-2Cr, suggesting that substrate mechanical properties can explain the observed differences in scale morphology.

KW - Alumina scale

KW - Creep strength

KW - Dispersion strengthening

KW - Iron aluminide

KW - Morphology

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DO - 10.1016/j.msea.2008.07.005

M3 - Article

AN - SCOPUS:53349169251

SN - 0921-5093

VL - 497

SP - 224

EP - 230

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 1-2

ER -

Effect of Fe-Al substrate mechanical properties on alumina scale morphology

Abstract

Keywords

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