Microstructural effects on the hydrogen permeation of an Inconel alloy 690 |
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| Authors: | J.M. Zagal,H.F. Ló pez,O. Flores,J.L. Albarran,L. Martí nez |
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| Affiliation: | aCentro de Ciencias Físicas, UNAM, P.O. Box 48-3, C.P. 62251, Cuernavaca, Morelos, Mexico;bMaterials Department, University of Wisconsin – Milwaukee, P.O. Box 784, Milwaukee, WI 53201, USA;cFacultad de Química, UNAM, Ciudad Universitaria, C.P. 04510, Mexico |
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| Abstract: | In the present work, hydrogen permeability tests were carried out in Inconel 690 in the as-received (AR) condition and after heat treating. The heat treatments promoted total solid solution (SA) or a microstructure full of grain boundary (gb) coverage with M23C6 carbides (A800). first and second polarization hydrogen transients were determined and used in disclosing the role of reversible and irreversible hydrogen trapping. It was found that in the SA condition, the permeation rates were the highest but they were significantly reduced in the AR condition, particularly in the A800 due to the presence of gb M23C6 carbides. |
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| Keywords: | A. Nickel B. Hydrogen permeation C. Kinetic parameters C. Stress corrosion |
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