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

    研究成果: Conference contribution

    抄録

    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.

    本文言語English
    ホスト出版物のタイトルInternational Conference on Nuclear Engineering, Proceedings, ICONE
    出版社American Society of Mechanical Engineers (ASME)
    1
    ISBN(印刷版)9780791855782
    DOI
    出版ステータスPublished - 2013
    イベント2013 21st International Conference on Nuclear Engineering, ICONE 2013 - Chengdu
    継続期間: 2013 7月 292013 8月 2

    Other

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

    ASJC Scopus subject areas

    • 原子力エネルギーおよび原子力工学

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