Advanced nano-secondary ion mass spectrometry analysis of intergranular oxide penetration of Alloy 600 in a pressurized water reactor primary water environment

Autor:	Catherine Guerre, Pierre Laghoutaris, J. Chêne, E. Herms, Régine Molins
Rok vydání:	2016
Předmět:	Materials science Alloy Metallurgy technology industry and agriculture Oxide chemistry.chemical_element engineering.material Intergranular corrosion Oxygen Secondary ion mass spectrometry chemistry.chemical_compound chemistry engineering Water environment Grain boundary Stress corrosion cracking
DOI:	10.1016/b978-0-08-100049-6.00008-2
Popis:	Advanced nano-secondary ion mass spectrometry analyses were used to investigate intergranular attack and improve the understanding of stress corrosion cracking in Alloy 600. Observations and analyses carried out on cross-sectioned samples without applied stress revealed penetrative intergranular attacks. Oxygen tracer evidence shows that oxide does not constitute a barrier against oxygen diffusion in oxide. This result allows us to investigate a new mechanistic model. Oxide growth seems to depend on oxygen diffusion in porous oxide associated with chromium diffusion in strained alloy to the grain boundary located beyond the crack tip. Strain should increase transport kinetics and promote oxide formation by increasing rates of defects such as dislocations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7d88cbc8fb08614b39bc4b3bb88ce69b https://doi.org/10.1016/b978-0-08-100049-6.00008-2 Zobrazit plný text záznamu