Some observations on the effects of sulfur and active elements on the oxidation of Fe-Cr-Al alloys

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Oxidation of Metals

DOI:https://doi.org/10.1007/BF01046894· OSTI ID:96458

Forest, C; Davidson, J H ^[1]

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1. Centre de Recherches, IMPHY (France)

A very-low-sulfur-content industrial Fe-Cr-Al alloy has been used both as a baseline and as a charge material for laboratory melts with variable sulfur and rare-earth additions. No significant differences in behavior were observed in cyclic oxidation tests on 1-mm-thick coupons at 1100{degrees}C, except for an excessive rare-earth content, which led to accelerated scale growth. At 1300{degrees}C, alloys without rare-earth additions developed high growth stresses in the oxide, leading to large tensile strains in the substrate. The oxide-metal interface in the low-sulfur (<2 ppm) material resisted these stresses and the oxide remained adherent. However, as little as 4 ppm S was sufficient to cause considerable spalling. Rare-earth additions markedly reduced growth stresses and eliminated both dimensional instability and spalling.

• Sponsoring Organization: USDOE
• OSTI ID: 96458
• Journal Information: Oxidation of Metals, Journal Name: Oxidation of Metals Journal Issue: 5-6 Vol. 43; ISSN OXMEAF; ISSN 0030-770X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADHESION
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
IRON BASE ALLOYS
MICROSTRUCTURE
OXIDATION
RARE EARTH ADDITIONS
SCALING
STRESSES
SULFUR CONTENT