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The solubility of hydrogen in liquid binary Al-Li alloys

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Abstract

The solubility of hydrogen in liquid binary aluminum alloys with 1, 2, and 3 wt pct lithium has been determined for the temperature range of 913 to 1073 K and pressure 5.3 × 104 to 10.7 × 104 Pa, using an appropriate version of Sieverts’ method. The results fit the Van’t Hoff isobar and Sieverts’ isotherm and the solubility,S, is given by: Al-1 pct Li: log(S/S°) − 1/2 log(P/P°) = −2113/T/k + 2.568 Al-1 pct Li: log(S/S°) − 1/2 log(P/P°) = −2797/T/k + 3.329 Al-1 pct Li: log(S/S°) − 1/2 log(P/P°) = −2889/T/k + 3.508 whereS° is a standard value of solubility equal to 1 cm3 of diatomic hydrogen measured at 273 K and 101,325 Pa per 100 g of metal, andP° is a standard pressure equal to 101,325 Pa. Added lithium progressively increases the solubility of hydrogen in liquid aluminum, due more to its effect on the entropy of solution of hydrogen, through its influence on the liquid metal structure than to an increase in the solute hydrogen atom binding enthalpy.

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Authors and Affiliations

  1. Alcoa Laboratories, Alcoa Center, 15069, PA

    P. N. Anyalebechi (Research Engineer) & D. A. Granger (Research Fellow)

  2. Department of Materials Technology, Brunei, The University of West London, UB8 3PH, Middlesex, England

    D. E. J. Talbot (Senior University Lecturer)

Authors
  1. P. N. Anyalebechi
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  2. D. E. J. Talbot
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  3. D. A. Granger
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Anyalebechi, P.N., Talbot, D.E.J. & Granger, D.A. The solubility of hydrogen in liquid binary Al-Li alloys. Metall Trans B 19, 227–232 (1988). https://doi.org/10.1007/BF02654206

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