本工作采用气相渗透技术,测定220—420℃温度范围内,JBK—75合金的氢渗透率和扩散系数,研究了JBK—75合金中沉淀析出相γ′对氢渗透行为的影响。结果表明,740℃时效析出的γ′相对氢的扩散行为没有明显影响;在实验温度范围内,氢在JBK—75合金中的渗透行为遵循Arrhenius 关系式,渗透率和扩散系数与温度的关系分别表示为Φ=4.36×10~(-4)exp[-62.10(kJ/mol)/RT]mol/(m·s·MPa~(1/2))D=3.01×10~(-7)exp[-48.52kJ/mol)/R7]m~2/s
ABSTRACT Permeability and diffusivity of hydrogen in JBK—75 alloy were measuredover the temperatue range of 200 to 420℃ using a gaseous permeation technique.The ef-fects of γ′ precipitate phase in the alloy on hydrogen permeation behaviour were investi-ga
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