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HYDROGEN PERMEATION AND DIFFUSION IN ALLOY INCOLOY 903 |
XU Jian; SUN Xiukui; CHEN Wenxiu; LI Yiyi (State Key Laboratory of RSA; Institute of Metal Research; Academia Sinica) |
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Cite this article:
XU Jian; SUN Xiukui; CHEN Wenxiu; LI Yiyi (State Key Laboratory of RSA; Institute of Metal Research; Academia Sinica). HYDROGEN PERMEATION AND DIFFUSION IN ALLOY INCOLOY 903. Acta Metall Sin, 1992, 28(11): 23-27.
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Abstract 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.
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Received: 18 November 1992
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