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An effect of gamma-neutron irradiation and oxygen admixtures on interaction of hydrogen with austenitic 18Cr–10Ni–Ti steel

B.G Polosukhin, E.M Sulimov, S.Y Mitrofanov1998年Fusion Engineering and DesignIF 1.7出版社

AbstractExperimental data on permeability and diffusion of hydrogen through austenitic 18Cr–10Ni–0.65Ti steel with 0.08 and 0.12 wt.% of carbon have been obtained with special equipment designed and installed at the research reactor IVV-2M. It has been shown that parameters of hydrogen isotope transfer in the steel increased substantially during irradiation by fast neutrons of flux density ffast<1.8×1018 n m−2 per s, fluence F=9.5×1024 n m−2 (E>0.1 MeV) and absorbed gamma dose 3.6 W g−1 at temperatures of 573–1073 K. Under these irradiation conditions, even a small oxygen admixture content in hydrogen allowed creation of reliable surface barriers on the steel, which essentially decreased hydrogen permeability. At the same time, the physico-mechanical properties of the steel under study changed.

日本語訳

オーステナイト系18Cr–10Ni–0.65Ti鋼(炭素含有量0.08wt%および0.12wt%)における水素の透過性と拡散に関する実験データを、研究用原子炉IVV-2Mに設計・設置した特別な装置を用いて取得した。高速中性子照射(フラックス密度f<sub>fast</sub>&lt;1.8×10<sup>18</sup> n m<sup>−2</sup> s<sup>−1</sup>、フルエンスF=9.5×10<sup>24</sup> n m<sup>−2</sup>(E&gt;0.1 MeV)、吸収ガンマ線量3.6 W g<sup>−1</sup>)中、温度573〜1073 Kにおいて、当該鋼中の水素同位体の透過パラメータが大幅に増加することが示された。これらの照射条件下では、水素中の微量の酸素含有量であっても、鋼表面に信頼性の高いバリア層を形成することが可能となり、水素透過性が本質的に低下した。同時に、調査対象の鋼の物理的・機械的特性にも変化が生じた。

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