Hydrogen absorption behavior of titanium alloys by cathodic polarization

Yasuhiro Ishijima, Takafumi Motooka, Fumiyoshi Ueno, Masahiro Yamamoto, Gunzo Uchiyama, Jun'ichi Sakai, Ken'ichi Yokoyama, Eiji Tada, Tooru Tsuru, Yasuo Nojima, Sachio Fujine

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Titanium and Ti-5mass%Ta alloy has been utilized in nuclear fuel reprocessing plant material because of its superior corrosion resistance in nitric acid solutions. However, Ti alloy have been known to high susceptibility of hydrogen embrittlement. To evaluate properties of hydrogen absorption and hydrogen embrittlement of Ti alloys, cathodic polarization tests and slow strain rate tests (SSRT) under cathodic polarization were carried out. Results show titanium hydrides covered on the surface of metals and hydrides thickness were within 10μm. But hydride did not observed at inner part of metals. Ti and Ti-5%Ta did not show hydrogen embrittlement by SSRT under cathodic charging. These results suggested that Ti and Ti-5%Ta could absorb hydrogen. But hydrogen did not penetrate inner portion of the metals more than 10μm in depth because titanium hydrides act as barrier of hydrogen diffusion. It is considered that retardation of hydrogen diffusion hindered hydrogen embrittlement of Ti and Ti-5%Ta alloys.

    Original languageEnglish
    Title of host publicationInternational Conference on Nuclear Engineering, Proceedings, ICONE
    PublisherAmerican Society of Mechanical Engineers (ASME)
    Volume1
    ISBN (Print)9780791855782
    DOIs
    Publication statusPublished - 2013
    Event2013 21st International Conference on Nuclear Engineering, ICONE 2013 - Chengdu
    Duration: 2013 Jul 292013 Aug 2

    Other

    Other2013 21st International Conference on Nuclear Engineering, ICONE 2013
    CityChengdu
    Period13/7/2913/8/2

    ASJC Scopus subject areas

    • Nuclear Energy and Engineering

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  • Cite this

    Ishijima, Y., Motooka, T., Ueno, F., Yamamoto, M., Uchiyama, G., Sakai, J., Yokoyama, K., Tada, E., Tsuru, T., Nojima, Y., & Fujine, S. (2013). Hydrogen absorption behavior of titanium alloys by cathodic polarization. In International Conference on Nuclear Engineering, Proceedings, ICONE (Vol. 1). [V001T02A034] American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/ICONE21-16079