The Effect of Temperature on the Preferential Intergranular Oxidation Susceptibility of Alloy 600

The Effect of Temperature on the Preferential Intergranular Oxidation Susceptibility of Alloy 600

Oxidation studies were performed on solution-annealed Alloy 600 in high-temperature steam at 400 °C and in simulated pressurized water reactor primary water at 320 °C under environmental conditions where this alloy is known to be susceptible to intergranular stress corrosion cracking. Advanced analy...

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Veröffentlicht in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2018-05, Vol.49 (5), p.1879-1894
Hauptverfasser: Bertali, G., Burke, M. G., Scenini, F., Huin, N.
Format: Artikel
Sprache:eng
Schlagworte:
Alloys
Characterization and Evaluation of Materials
Chemistry and Materials Science
Electron microscopy
Grain boundaries
Grain boundary migration
Intergranular corrosion
Materials Science
Metallic Materials
Metallurgy
Nanotechnology
Nickel base alloys
Oxidation
Pressurized water
Scanning electron microscopy
Stress corrosion cracking
Structural Materials
Superalloys
Surfaces and Interfaces
Temperature effects
Thin Films
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Zusammenfassung:Oxidation studies were performed on solution-annealed Alloy 600 in high-temperature steam at 400 °C and in simulated pressurized water reactor primary water at 320 °C under environmental conditions where this alloy is known to be susceptible to intergranular stress corrosion cracking. Advanced analytical transmission electron microscopy characterization and detailed scanning electron microscopy analysis highlighted extensive preferential intergranular oxidation as well as enhanced Cr and O diffusivities associated with this oxidation. These findings, as well as the preferential intergranular oxidation susceptibility and diffusion-induced grain boundary migration, are discussed in terms of their roles as precursors to stress corrosion cracking.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-018-4491-9