Conclusions
The structure created by preliminary treatment has a strong influence on the swelling, the nature of pore generation, the dislocation density, and the phase composition of 0Kh16N15M3B steel. The greatest reduction in swelling was produced by 20% cold deformation, which at a high dislocation density led to a sharp refinement of the pores and lamellar precipitations.
The lamellar phases precipitated in steels of the Kh16N15 type during the irradiation after special alloying or preliminary treatment do not always determine the nature of the generation and growth of vacancy pores.
At a temperature of 460 and 550°C the swelling of nickel is less by a factor of about 3, and the swelling of α iron is less by a factor of about 10, than the swelling of austenized 0Kh16N15M3B steel.
The least swelling was found in the Kh77TYu alloy (with 77% nickel), which before irradiation contained γ′-phase pre-precipitations, whereas the swelling of alloys with 40 and 60% nickel is 100 times as great. From this it is clear that the nickel content is not the only factor determining the swelling.
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Additional information
Journal version of a report delivered at the Conference on the Study of Reactor Materials (Alushta, 1978).
Translated from Atomnaya Énergiya, Vol. 45, No. 6, pp. 433–439, December, 1978.
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Agapova, N.P., Ageev, V.S., Afrikanov, I.N. et al. Swelling of steels and alloys irradiated in the BOR-60 reactor to a fluence of 1.1·1023 neutrons/cm2 . At Energy 45, 1169–1175 (1978). https://doi.org/10.1007/BF01118115
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DOI: https://doi.org/10.1007/BF01118115