Reactive Element (Y,Ce) Effect on Stresses Determined In-Situ during Iron Oxidation at 800°C
| Autor: | Jean Pierre Larpin, M.F. Stroosnijder, Henri Buscail, R. Cueff, Eric Caudron, Françoise Rabaste, Frédéric Riffard |
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| Rok vydání: | 2001 |
| Předmět: |
Materials science
Mechanical Engineering High-temperature corrosion Metallurgy Polishing chemistry.chemical_element Yttrium engineering.material Condensed Matter Physics Stress (mechanics) Compressive strength chemistry Coating Mechanics of Materials Residual stress Ultimate tensile strength engineering General Materials Science Composite material |
| Zdroj: | Materials Science Forum. :483-490 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.369-372.483 |
| Popis: | In-situ stress determinations by X-ray diffraction have been performed during pure iron oxidation (p(O 2 ) = 2 x 10 -3 Pa, T = 800°C). On yttrium implanted specimens the stress level is close to zero before oxidation. On CeO 2 coated specimens, the initial compressive stress due to surface polishing is not modified by the coating. During oxidation, the in-situ compressive stress value determined in the Fe (1-x) O scale, is not strongly dependent upon the reactive element nature. Nevertheless, the stress evolution during cooling and residual stresses determined after cooling to room temperature are very different. Blank and CeO 2 coated specimens show relatively high compressive stresses whereas implanted samples show low tensile residual stresses. |
| Databáze: | OpenAIRE |
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