Abstract
Hydrogen permeability, diffusivity, and solubility have been measured for a Ni-base superalloy, WASPALOY,* over the temperature range of 200 to 560 °C. Measurements were made with various surface conditions. The hydrogen diffusivity and permeability values for Pd-coated WASPALOY were between those for pure nickel and for austenitic stainless steel. Hydrogen in uncoated WASPALOY had consistently lower effective diffusivity and permeability than in the Pd-coated condition. Gold-plating on WASPALOY or adding H2O to H2 gas substantially reduced both transport parameters, presumably due to slower surface or interface kinetics and lower permeability of hydrogen in the gold layer. Independently measured hydrogen solubility determined by equilibration of bulk specimens with H2 gas was roughly 60 pct of the solubility obtained by dividing the effective diffusivity into the permeation constant. This is discussed on the basis of internal trapping, which reduced the effective diffusivity and resulted in a higher apparent solubility.
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References
G.C. Smith:Hydrogen in Metals, I.M. Bernstein and A.W. Thompson, eds., ASM, Metals Park, OH, 1974, p. 485.
R.J. Walter, J. D. Frandsen, and R.P. Jewett:Hydrogen Effects in Metals, I.M. Bernstein and A.W. Thompson, eds., TMS-AIME, Warrendale, PA, 1980, p. 819.
H.R. Gray:Hydrogen Embrittlement Testing, ASTM STP 543, ASTM, 1974, p. 133.
G. M. Pressouyre:Current Solutions to Hydrogen Problems in Steels, C.G. Interrante and G.M. Pressouyre, eds., ASM, Metals Park, OH, 1982, p. 18.
P.H. Studebaker: M. S. Thesis, Univ. of Ill. at Urbana-Champaign, 1981.
W. M. Robertson:Zeit. Metallkunde, 1973, vol. 64, p. 436.
W. M. Robertson:Metall. Trans. A, 1977, vol. 8A, p. 1709.
T-P. Perng and C. J. Altstetter:Acta Metall., 1986, vol. 34, p. 1771.
J. Völkl and G. Alefeld:Diffusion in Solids, A. S. Nowick and J. J. Burton, eds., Academic Press, 1975, p. 252.
R. M. Latanision and M. Kurkela:Corrosion, 1983, vol. 39, p. 174.
J. Friedel:Ber. der Bunsen-Gesellschaft, 1972, vol. 76, p. 828.
V.W. Eichenauer and D. Liebscher:Zs. Naturforsh., 1962, vol. 17a, p. 355.
V. A. Kurakin, A. A. Kurdyumov, V. N. Lyasnikov, and M.I. Potapov:Sov. Phys. Solid State, 1979, vol. 21, p. 616.
M. R. Louthan, Jr. and G. R. Caskey, Jr.:Int. J. Hydrogen Energy, 1976, vol. 1, p. 291.
R.B. McLellan:J. Phys. Chem. Solids, 1973, vol. 34, p. 1137.
J. Crank:Mathematics of Diffusion, Clarendon Press, Oxford, 1975, p. 267.
T. Tanabe, Y. Yamanishi, K. Sawada, and S. Imoto:J. Nucl. Mater., 1984, vol. 123, p. 1568.
R. A. Strehlow and H. C. Savage:Nucl. Tech., 1974, vol. 22, p. 127.
C. L. Huffine and J. M. Williams:Corrosion, 1960, vol. 16, p. 430t.
W. A. Swansiger, R. G. Musket, L. J. Wierick, and W. Bauer:J. Nucl. Mater., 1974, vol. 53, p. 307.
M.R. Piggot and A. C. Siarkowski:J. Iron Steel Inst., 1972, vol. 210, p. 901.
D. W. Rudd, D. W. Vose, and S. J. Johnson:J. Phys. Chem., 1961, vol. 65, p. 1018.
T-P. Perng and C. J. Altstetter: Acta Metall., in press.
G. J. Thomas:Hydrogen Effects in Metals, I.M. Bernstein and A.W. Thompson, eds., TMS-AIME, Warrendale, PA, 1980, p. 77.
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WASPALOY is a trademark of United Technologies Corporation.
T-P. Perng, Formerly Postdoctoral Associate at the University of Illinois
M.J. Johnson, Formerly Student Assistant at the University of Illinois
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Perng, T.P., Johnson, M.J. & Altstetter, C.J. Hydrogen permeation through coated and uncoated WASPALOY. Metall Trans A 19, 1187–1192 (1988). https://doi.org/10.1007/BF02662579
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DOI: https://doi.org/10.1007/BF02662579