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Hydrogen trapping behavior at vacancies introduced by electron irradiation with different energy in B2 ordered Fe base alloys
https://repo.qst.go.jp/records/78767
https://repo.qst.go.jp/records/7876770245427-4aad-4d15-ae60-6788e38310b1
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-01-30 | |||||
| タイトル | ||||||
| タイトル | Hydrogen trapping behavior at vacancies introduced by electron irradiation with different energy in B2 ordered Fe base alloys | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Hori, F.
× Hori, F.× Sumikura, Y.× Takano, A.× Sugita, K.× Ohsawa, K.× Qiu, X.× Maekawa, Masaki× Kawasuso, Atsuo× Saito, Yuuichi× Maekawa, Masaki× Kawasuso, Atsuo× Saito, Yuuichi |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | 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. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 2019 4th Japan-China Joint Workshop on Positron Science | |||||
| 発表年月日 | ||||||
| 日付 | 2019-10-29 | |||||
| 日付タイプ | Issued | |||||
