Microstructural Characterisation of Austenitic Heat Resistant Sanicro 25 Steel after Steam Oxidation
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
3.1. As-Received Material
3.2. After Oxidation
4. Conclusions
- During heat treatment of Sanicro 25 alloy, the matrix semicoherent M23C6 carbides nucleate on the interface between the matrix and the Z-phase,
- Two-phase oxide scale developed on the steel surface is continuous and well- protective.
- Characteristic plates of Cr2O3 are present, indicating the presence of volatile compounds decomposing at the surface.
- Growth terraces are present at the surfaces of plates, suggesting the presence of surface diffusion processes.
- Plates are built of Cr2O3 crystals, separated by amorphous SiO2 phase.
Funding
Acknowledgments
Conflicts of Interest
References
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Element | Fe | Ni | Cr | W | Cu | Co | Mn | Nb | N | Si | C | Other |
---|---|---|---|---|---|---|---|---|---|---|---|---|
wt.% | 42.8 | 25.4 | 22.4 | 3.4 | 3 | 1.5 | 0.5 | 0.5 | 0.2 | 0.2 | 0.06 | 0.04 |
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Rutkowski, B. Microstructural Characterisation of Austenitic Heat Resistant Sanicro 25 Steel after Steam Oxidation. Materials 2020, 13, 3382. https://doi.org/10.3390/ma13153382
Rutkowski B. Microstructural Characterisation of Austenitic Heat Resistant Sanicro 25 Steel after Steam Oxidation. Materials. 2020; 13(15):3382. https://doi.org/10.3390/ma13153382
Chicago/Turabian StyleRutkowski, Bogdan. 2020. "Microstructural Characterisation of Austenitic Heat Resistant Sanicro 25 Steel after Steam Oxidation" Materials 13, no. 15: 3382. https://doi.org/10.3390/ma13153382