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Changes in the fine structure of grain boundaries, induced by the absorption of helium, and helium embrittlement

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Abstract

The changes in the structure of grain boundaries in tungsten due to the absorption of helium atoms are investigated experimentally and theoretically. Intergranular dilatation localized in a plane layer of subatomic thickness is observed. It is established that dilatation is accompanied by splitting of the cores of grain-boundary dislocations and a decrease in the grain-boundary stacking fault energy. The relationship of intergranular damage to the changes induced in the parameters of grain-boundary dislocations by the absorption of helium is discussed.

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Authors and Affiliations

  1. National Science Center, Kharkov Physicotechnical Institute, 310108, Kharkov, Ukraine

    V. I. Gerasimenko, I. M. Mikhailovskii, I. M. Neklyudov, A. A. Parkhomenko & O. A. Velikodnaya

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  1. V. I. Gerasimenko
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  2. I. M. Mikhailovskii
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  3. I. M. Neklyudov
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  4. A. A. Parkhomenko
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  5. O. A. Velikodnaya
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Zh. Tekh. Fiz. 68, 64–69 (July 1998)

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Gerasimenko, V.I., Mikhailovskii, I.M., Neklyudov, I.M. et al. Changes in the fine structure of grain boundaries, induced by the absorption of helium, and helium embrittlement. Tech. Phys. 43, 803–808 (1998). https://doi.org/10.1134/1.1259076

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  • DOI: https://doi.org/10.1134/1.1259076

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