@misc{oai:repo.qst.go.jp:00078767,
 author = {Hori, F. and Sumikura, Y. and Takano, A. and Sugita, K. and Ohsawa, K. and Qiu, X. and Maekawa, Masaki and Kawasuso, Atsuo and Saito, Yuuichi and Maekawa, Masaki and Kawasuso, Atsuo and Saito, Yuuichi},
 month = {Oct},
 note = {B2  ordered  intermetallic  compounds  is  widely  used  as  a  high  strength  material  at  high temperature, because of their good properties such as specific strength to weight ratio and oxidation  resistance.  However,  it  is  also  known  that  corrosion fatigue  with  hydrogen embrittlement tend to occur for B2 type Fe-Al alloy. Our result of first principle calculation shows that a few hydrogen atoms possibly trapped by one vacancy and its trapping behavior strongly depends on the type of vacancies in some B2 ordered alloys. There are A-type and B-type vacancies in a B2 ordered A-B compound alloy at least. In addition, it is difficult to confirm experimentally which type of vacancy is trapping hydrogen atoms in compound alloys. On this point of view, we have investigated the hydrogen trapping behavior in B2 ordered Fe-Al and Fe-Rh alloys with electron irradiation followed by hydrogen charging and H+ irradiation by positron annihilation techniques, X-ray diffraction and thermal desorption spectrometry (TDS). Also the hardness change was measured for these alloys before and after hydrogen  charging.  Positron  annihilation  coincidence  Doppler  broadening  measurement results show that VFe in Fe-Rh and VAl in Fe-Al are dominantly introduced by low energy electron irradiation, and it found from positron lifetime and TDS measurements that hydrogen atoms are trapped by these vacancies introduced by the irradiation., 2019 4th Japan-China Joint Workshop on Positron Science},
 title = {Hydrogen trapping behavior at vacancies introduced by electron irradiation with different energy in B2 ordered Fe base alloys},
 year = {2019}
}