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Embrittlement kinetics of N 80 steel in H2S environment

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Abstract

The kinetics of hydrogen embrittlement of an N 80 steel have been studied in a Na2S-CH3COOH solution. Determination of hydrogen content, metal density and embrittlement degree, together with acoustic-emission measurements have shown that the hydrogen distribution with-in the metal lattice is time-dependent and strongly influenced by non-metallic inclusions. The inclusions cause local stress intensification, favoring hydrogen collection in the lattice around them. Fracturing of charged specimens at different times evidences a mechanism of crack inactivation. An explanation of crack inactivation in terms of plastic deformation around inclusions due to hydrogen-dislocation interaction is suggested.

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Authors and Affiliations

  1. Materials Division, Centro Sperimentale Metallurgico, Rome, Italy

    L. Giuliani (Research Metallurgists), M. Mirabile (Research Metallurgists) & M. Sarracino (Research Metallurgists)

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  1. L. Giuliani
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  2. M. Mirabile
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  3. M. Sarracino
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Giuliani, L., Mirabile, M. & Sarracino, M. Embrittlement kinetics of N 80 steel in H2S environment. Metall Trans 5, 2069–2073 (1974). https://doi.org/10.1007/BF02644500

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