Szczegóły publikacji
Opis bibliograficzny
Microstructure of Sanicro 25 after long-term steam oxidation characterised by advanced electron microscopy techniques / Grzegorz CEMPURA, Aleksander GIL, Alina Agüero, Marcon Gutiérrez, Adam KRUK, Aleksandra CZYRSKA-FILEMONOWICZ // W: EUROCORR 2018 [Dokument elektroniczny] : the annual congress of the European Federation of Corrosion : applied science with constant awareness : 9–13 September, Cracow/Poland. — Wersja do Windows. — Dane tekstowe. — [Kraków : s. n.], [2018]. — Dysk Flash. — ISBN (wersji drukowanej) na podstawie bazy Scopus. — ISBN: 978-151088637-7. — S. 1–9. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 9, Abstr. — Dostęp również online: http://eurocorr.efcweb.org/2018/abstracts/3/113982.pdf [2020-03-30]
Autorzy (6)
- AGHCempura Grzegorz
- AGHGil Aleksander
- Agüero Alina
- Gutiérrez Marcos
- AGHKruk Adam
- AGHCzyrska-Filemonowicz Aleksandra
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 116272 |
|---|---|
| Data dodania do BaDAP | 2018-09-20 |
| Rok publikacji | 2018 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
| Konferencja | The annual congress of the European Federation of Corrosion |
Abstract
The Sanicro 25 (42Fe22Cr25NiWCuNbN) is an austenitic stainless steel produced by Sandvik corporation. The steel, due to its satisfactory creep and oxidation resistance at high temperature, is predicted for use in reheaters and superheaters in advanced coal-fired steam boilers. High Cr content (~22%) guarantee very good oxidation resistance in steam up to 750 °C. This study presents the microstructure of Sanicro 25 after oxidation at 700 °C up to 25 000h in steam investigated in detail by advanced electron microscopy and spectroscopy methods. Microscopic analyses were performed using scanning- and transmission electron microscopy (SEM, TEM), while chemical composition and elemental distribution were analyzed using energy dispersive X-ray spectrometry. The SEM was used for investigation of the scale morphology and in-depth steel microstructure. Further analyses were conducted by TEM using a S/TEM Titan Cubed G2 60-300 equipped with the ChemiSTEM (FEI) system. Phase identification was done by electron diffraction with a help of the JEMS software. During steam oxidation of Sancro 25 up to 25 000h in water vapour approx. 3 μm thick dual layered scale, consisting mainly of Cr2O3 plates, was formed. The thicker outer sub-layer of the scale was also enriched with iron and manganese. The growth of the Cr2O3 scale caused the formation of chromium depleted zone underneath the oxide layer. In the underlying bulk material, M23C6 and W-rich Laves phase particles were precipitated on the austenite grain boundaries, while M23C6 and Z-phase were formed within the grains. The study showed that the oxidised Sa nicro 25 steel exhibits significant changes of its microstructure and chemical composition (up to 20 μm in-depth) in comparison to the as-received one.
