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.
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2013 21st International Conference on Nuclear Engineering
July 29–August 2, 2013
Chengdu, China
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-5578-2
PROCEEDINGS PAPER
Hydrogen Absorption Behavior of Titanium Alloys by Cathodic Polarization
Yasuhiro Ishijima,
Yasuhiro Ishijima
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Takafumi Motooka,
Takafumi Motooka
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Fumiyoshi Ueno,
Fumiyoshi Ueno
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Masahiro Yamamoto,
Masahiro Yamamoto
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Gunzo Uchiyama,
Gunzo Uchiyama
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Jun’ichi Sakai,
Jun’ichi Sakai
Waseda University, Tokyo, Japan
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Ken’ichi Yokoyama,
Ken’ichi Yokoyama
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
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Eiji Tada,
Eiji Tada
Tokyo Institute of Technology, Tokyo, Japan
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Tooru Tsuru,
Tooru Tsuru
Tokyo Institute of Technology, Tokyo, Japan
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Yasuo Nojima,
Yasuo Nojima
Japan Nuclear Energy Safety Organization, Tokyo, Japan
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Sachio Fujine
Sachio Fujine
Japan Nuclear Energy Safety Organization, Tokyo, Japan
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Yasuhiro Ishijima
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Takafumi Motooka
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Fumiyoshi Ueno
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Masahiro Yamamoto
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Gunzo Uchiyama
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Jun’ichi Sakai
Waseda University, Tokyo, Japan
Ken’ichi Yokoyama
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
Eiji Tada
Tokyo Institute of Technology, Tokyo, Japan
Tooru Tsuru
Tokyo Institute of Technology, Tokyo, Japan
Yasuo Nojima
Japan Nuclear Energy Safety Organization, Tokyo, Japan
Sachio Fujine
Japan Nuclear Energy Safety Organization, Tokyo, Japan
Paper No:
ICONE21-16079, V001T02A034; 5 pages
Published Online:
February 7, 2014
Citation
Ishijima, Y, Motooka, T, Ueno, F, Yamamoto, M, Uchiyama, G, Sakai, J, Yokoyama, K, Tada, E, Tsuru, T, Nojima, Y, & Fujine, S. "Hydrogen Absorption Behavior of Titanium Alloys by Cathodic Polarization." Proceedings of the 2013 21st International Conference on Nuclear Engineering. Volume 1: Plant Operations, Maintenance, Engineering, Modifications, Life Cycle and Balance of Plant; Nuclear Fuel and Materials; Radiation Protection and Nuclear Technology Applications. Chengdu, China. July 29–August 2, 2013. V001T02A034. ASME. https://doi.org/10.1115/ICONE21-16079
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