Oxidation limited life times of chromia forming ferritic steels
| Autor: | N. Christiansen, Vladimir Shemet, Lorenz Singheiser, P. Huczkowski, J. Piron-Abellan, Willem J. Quadakkers |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy Alloy technology industry and agriculture Metals and Alloys Life time Oxide chemistry.chemical_element General Medicine engineering.material Chromia Surfaces Coatings and Films Corrosion Chromium chemistry.chemical_compound chemistry Mechanics of Materials Materials Chemistry engineering Environmental Chemistry Growth rate Deep drawing |
| Zdroj: | Materials and Corrosion. 55:825-830 |
| ISSN: | 1521-4176 0947-5117 |
| DOI: | 10.1002/maco.200303798 |
| Popis: | Long term, cyclic oxidation studies of three high - Cr, ferritic steels were carried out at 800 °C and 900°C in air. It was found that with decreasing sample thickness the life time of the mentioned alloys decreases due to breakaway phenomena. This effect is caused by faster exhaustion of the chromium reservoir from the bulk alloy in case of thinner components. The observed life time limits can be predicted with reasonable accuracy by a theoretical model, using oxide growth rate parameters, initial alloy Cr content and critical Cr content required for protective chromia scale formation. In the calculation it has, however, to be taken into account that the oxidation rates of the steels increase with decreasing specimen thickness. |
| Databáze: | OpenAIRE |
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