Abstract
The critical iodine concentration (Ccr) is determined for steel KhNS-4 (steel OKH16N15M3B after vacuum remelting and and microalloying with Sc) at 923°K to assess the feasibility of its use as a jacket material for the fuel cells of fast reactors. The value of Ccr is established from criteria of residual deformation at failure, longevity, and creep rate under a given stress. Experiments are conducted under ordinary and in reactor conditions. It is noted that creep rate is the most sensitive criterion. It increases sharply as the iodine concentration reaches values of ≈ 10–15 mg/cm2, depending on the stress level, whose growth is accompanied by an increase in the value of Ccr It is demonstrated that radiation damage improves resistance to corrosion cracking. It is concluded that the Ccr values obtained exceed the corrodent concentration actually obtained by many times.
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Translated from Problemy Prochnosti, No. 12, pp. 12–17, December, 1993.
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Kiselevskii, V.N., Kovalev, V.V., Neklyudov, I.M. et al. Corrosion-cracking resistance of austenitic stainless steel under stress in an iodine medium. Strength Mater 25, 864–869 (1993). https://doi.org/10.1007/BF00774631
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DOI: https://doi.org/10.1007/BF00774631