Hydrogen trapping behavior at vacancies introduced by electron irradiation in B2 ordered Fe base alloys

DOI Web Site 17 References
  • Hori Fuminobu
    Osaka Metropolitan University, 1–2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
  • Sumikura Yuuga
    Osaka Metropolitan University, 1–2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
  • Sugita Kento
    Osaka Metropolitan University, 1–2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
  • Kaneno Yasuyuki
    Osaka Metropolitan University, 1–2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
  • Ohsawa Kazuhito
    Research Institute for Applied Mechanics, Kyushu University, Kasuga-koen 6–1, Kasuga, Fukuoka 845–8580, Japan
  • Qiu Xu
    Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Sennan-gun, Osaka 890–0494, Japan
  • Maekawa Masaki
    National Institute for Quantum and Radiological Science and Technology, Takasaki, Gunma 370–1292, Japan
  • Kawasuso Atsuo
    National Institute for Quantum and Radiological Science and Technology, Takasaki, Gunma 370–1292, Japan
  • Saito Yuichi
    National Institute for Quantum and Radiological Science and Technology, Takasaki, Gunma 370–1292, Japan

Description

<p>We have investigated the hydrogen trapping behavior in B2 ordered Fe-50%Al alloy with electron irradiation followed by hydrogen implantation by using positron annihilation techniques, X-ray diffraction and thermal desorption spectrometry (TDS). Positron annihilation lifetime and coincidence Doppler broadening measurement results showed that VFe in B2 type Fe-Al alloys are dominantly introduced by low energy (2 MeV) electron irradiation, and more complex vacancy type defects are formed by high energy (8 MeV) electron irradiation. The result of TDS measurement showed that hydrogen atoms are trapped by vacancy type defects, the resulting hydrogen desorption behavior is different for 2 MeV and 8 MeV irradiation cases.</p>

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