AbstractThe hydrogen permeability of 99.98% pure nickel pre-irradiated by the light ions of He, O, N, or C was studied as well as the hydrogen permeability of the same material under simultaneous bombardment by the same light ions and hydrogen ions. The experiments were carried out in the 100–300°C temperature range. The energy of these light ions used for irradiation was 30 keV, while the irradiation doses varied from 1×1021 m−2 to 1×1023 m−2. It was found that both of these types of irradiation caused the hydrogen permeability of the studied materials to decrease. The extent of decrease in hydrogen permeability was higher in the case of simultaneous bombardment of a sample with the hydrogen ions and ions of one of the light elements mentioned above. Investigations on the hydrogen permeability of nickel and type 16–15 stainless steel with certain structural features under hydrogen ion bombardment were also carried out. The influence of preliminary cold working (5, 15, 30, and 50%) on the hydrogen penetration as well as the effect of the grain size on the hydrogen permeability of these materials were also investigated. The grain size of the samples was in the 3–5, 30–50, and 400–600 μm ranges. The experiments were carried out at 150 and 200°C. It was found that preliminary cold working of the studied materials, as a rule, increased their hydrogen permeability. The investigation of the effect of grain size on the degree of hydrogen penetration through the steel showed that it was practically the same for the large-grain and medium-grain steel. The hydrogen permeability of the small-grain steel was about twice as that of the large- and medium-grain steel. Investigations on the hydrogen permeability (HP) through structural materials under simulation of thermonuclear reactor (TR) working conditions are very important in connection with solving the material science problems of controlled thermonuclear fusion (CTF).
99.99%純度のニッケルに対するHe、O、N、またはCの軽イオンによる予備照射が水素透過性に及ぼす影響、ならびに同一の軽イオンと水素イオンによる同時照射下での同材料の水素透過性について研究を行った。実験は100～300°Cの温度範囲で実施した。これらの軽イオンの照射エネルギーは30 keVであり、照射線量は1×10²¹ m⁻²から1×10²³ m⁻²の範囲で変化させた。両方のタイプの照射によって、研究対象材料の水素透過性が低下することが判明した。水素イオンと上記の軽元素のイオンの両方による同時照射の場合の方が、水素透過性の低下の程度は大きかった。さらに、特定の微細組織的特徴を有するニッケルおよび16-15型ステンレス鋼の水素イオン照射下での水素透過性についても調査を行った。予備的な冷間加工（5%、15%、30%、および50%）が水素透過に及ぼす影響、ならびに結晶粒径がこれらの材料の水素透過性に及ぼす影響についても検討した。試料の結晶粒径は3～5 μm、30～50 μm、および400～600 μmの範囲であった。実験は100～200°Cの温度範囲で実施した。研究対象材料への予備的な冷間加工は、一般的に水素透過性を増加させることが判明した。結晶粒径が鋼の水素透過の程度に及ぼす影響の調査では、粗大粒鋼と中粒鋼の間で水素透過性は実質的に同等であることが示された。微細粒鋼の水素透過性は、粗大粒鋼および中粒鋼の約2倍であった。制御熱核融合（CTF）の材料科学的課題の解決に関連して、熱核反応炉（TR）の作動条件を模擬した条件下での構造材料の水素透過性（HP）の研究は極めて重要である。