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Influence of hydrogen on electrochemical behavior of Ni-based superalloy 718

Odemer, Grégory and Andrieu, Eric and Blanc, Christine Influence of hydrogen on electrochemical behavior of Ni-based superalloy 718. (2018) International Journal of Hydrogen Energy, 43 (2). 1006-1011. ISSN 0360-3199

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Official URL: https://doi.org/10.1016/j.ijhydene.2017.11.081


Numerous studies have shown that Ni-based superalloy 718 may be sensitive to hydrogen embrittlement and have highlighted the dominant roles played by the hydrogen solubility and the hydrogen trapping. Samples were hydrogenated by cathodic polarization in molten salts under different conditions to vary the diffusible hydrogen content and to saturate the different hydrogen traps present in the microstructure strengthened by precipitation. Open circuit potential and galvanic coupling measurements were conducted in order to characterize the effect of diffusible and trapped hydrogen on electrochemical behavior and to discuss the possibility of galvanic coupling between zones with different hydrogen contents.

Item Type:Article
HAL Id:hal-01991073
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:23 Jan 2019 14:58

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