Strategies for High-Temperature Corrosion Simulations of Fe-Based Alloys Using the Calphad Approach: Part I
Autor: | Torbjörn Jonsson, Lina Kjellqvist, Reza Naraghi, Lars Höglund, Henrik Larsson, Sedigheh Bigdeli |
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Rok vydání: | 2021 |
Předmět: |
010302 applied physics
Work (thermodynamics) Materials science High-temperature corrosion Metallurgy Metals and Alloys Oxide 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Environmentally friendly Corrosion chemistry.chemical_compound chemistry 0103 physical sciences Materials Chemistry Fe based 0210 nano-technology CALPHAD Phase diagram |
Zdroj: | Journal of Phase Equilibria and Diffusion. 42:403-418 |
ISSN: | 1863-7345 1547-7037 |
Popis: | The environmental degradation of materials at high temperatures limits the useful life of different industrial components and hinders the development of more economical and environmentally friendly processes for the energy production. Despite the importance of this phenomena, a model to predict lifetime of materials that degrade due to high-temperature corrosion has up till now been lacking due to limitations of the computational possibilities and the complex nature of oxidation. In the present work we develop some strategies to model high-temperature corrosion in Fe-based alloys using the Calphad (Calculation of Phase Diagrams) approach. It is proposed that kinetic-based simulations for oxidation of Al and Cr can accurately represent the lifetime of the protective layers in FeCrAl and FeCr alloys at different temperatures in air. The oxide systems are in addition investigated by equilibrium calculations. The corrosion mechanisms of FeCr and FeCrAl alloys are discussed based on theoretical and experimental knowledge. |
Databáze: | OpenAIRE |
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