Abstract
The results of investigations of the effect of thermomechanical treatment (TMT) regimes on the regularities of phase transformations, microstructure, and mechanical properties of low-activation alloys of the V–4Ti–4Cr–(C, O, N) system are summarized. The mechanisms of these transformations and the relationship between the microstructure and the level of strength and plasticity are established. The TMT regimes are presented that provide a uniform bulk distribution of nanosized particles of stable oxycarbonitride, a significant increase in their density (dispersion), and an increase in the thermal stability of the microstructure. It is shown that these regimes lead to a significant (by 30–60%) increase in the short-term strength of alloys in a wide (from 293 to 1073 K) temperature range with preservation of a sufficiently high plasticity.
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ACKNOWLEDGMENTS
This work is dedicated to the blessed memory of Valery Andreevich Drobyshev, Candidate of Technical Sciences, metallurgist, materials scientist and technologist, who died suddenly in December 2020. V.A. Drobyshev was an outstanding specialist in the field of metallurgy of low-activation vanadium alloys, their smelting, and processing into semifinished products and products. To a large extent, the vanadium alloys obtained by V.A. Drobyshev determined the general level of work on the production and use of vanadium alloys in Russia (Bochvar High-Technology Research Institute of Inorganic Materials) and their competitiveness with similar alloys from the United States and Japan.
Funding
The work was supported by the state task of the Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, topic no. FWRW-2021-0008.
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Translated by V. Bukhanov
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Tyumentsev, A.N., Ditenberg, I.A., Grinyaev, K.V. et al. Microstructure and Mechanical Properties of Low-Activation V–4Ti–4Cr–(C, O, N) Vanadium Alloys Depending on Conditions of Their Technological and Thermomechanical Treatment. Phys. Atom. Nuclei 86, 1564–1576 (2023). https://doi.org/10.1134/S1063778823070232
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DOI: https://doi.org/10.1134/S1063778823070232