Incoloy 903合金氢渗透与扩散的研究

HYDROGEN PERMEATION AND DIFFUSION IN ALLOY INCOLOY 903

本工作采用气相氢渗透技术,测定了220—420℃温度范围内,Fe-Ni-Co基超合金Incoloy 903的氢渗透率和扩散系数,讨论了该合金时效处理后强化相γ′对氢渗透和扩散特性的影响。结果表明:该合金的氢透率和扩散系数几乎与热处理状态无关,不受时效析出的γ′沉淀相的影响。氢渗透率和扩散系数与温度的关系可分别表示为φ=9.36×10^(-5)exp[-54.20(kJ/mol)/RT]mol/m·s·MPa^(1/2), D=4.24×10^(-7)exp[-49.07(kJ/mol)/RT]m^2/s。

Permeability and diffusivity of hydrogen in Fe-Ni-Co-based superalloy Incoloy 903 were measured over the temperature range of 220 to 420℃ using a gaseous permeation technique. The effect of strengthening phase γ' precipitated after being aged on the hydrogen permeation and diffusion was investigated. It was indicated that the permeability and diffusivity of hydrogen in the alloy hardly depend on heat treatment condition and are not affected by γ' phase precipitated after being aged. The relationships between the permeability and diffusivity of hydrogen and the temperature can be respectively expressed as = 9.36×10^(-5)exp[-54.20(kJ / mol) / RT]mol / m · s · MPa^(1/2) and D = 4.24 × 10^(-7)exp[-49.07(kJ / mol) / RT] m^2 / s.