V. I. Bobrovskii, V. I. Voronin, V. I. Maximov, V. D. Parkhomenko, N. V. Proskurnina, V. V. Sagaradze

NEUTRON DIFFRACTION STUDIES OF CARBIDE PRECIPITATE FORMING IN THE 0.04C–4Cr–18Mn–2V STEEL UNDER THERMAL AGING AND FAST-NEUTRON IRRADIATION

Aging austenitic steels are characterized by a complex microstructure and various defects and precipitates, which largely determine the properties of steels. The formation and evolution of a system of defects in these materials are accompanied by changes in the Bragg and diffuse neutron scattering spectra. This makes neutron diffraction methods an effective means of studying them. This paper analyzes the results of our neutron diffraction experiments studying the changes in the crystal structure and a system of carbide precipitates in the 0.4C-4Cr-18Mn-2V austenitic manganese steel, which develop in the material under thermal aging and irradiation by fast neutron fluxes. Differences occurring under these effects are revealed. The results of the analysis are in good agreement with the electron microscopic data and supplement them in terms of studying irradiated samples.

Acknowledgment: The research was performed at the IMP Neutron Material Science Complex under the state assignment from the Ministry of Science and Higher Education of the Russian Federation (theme Flux, No. 122021000031-8).

References:

1. Sagaradze, V.V. and Uvarov, A.I. Uprochnenie i svoistva austenitnykh staley [Strengthening and Properties of Austenitic Steels]. RIO UrO RAN Publ., Ekaterinburg, 2013, 720 p. (In Russian).
2. Sagaradze, V.V., Nalesnik, V.M., Lapin, S.S., and Alyabyev, V.M. Precipitation hardening and radiation damage ability of austenitic stainless steels. Journal of Nuclear Materials, 1993, 202 (1–2), 137–144. DOI: 10.1016/0022-3115(93)90036-X.
3. Watanabe, H., Muroga, T., and Yoshida, N. The temperature dependent role of phosphorus and titanium in microstructural evolution of Fe–Cr–Ni alloys irradiated in FFTF. Journal of Nuclear Materials, 1996, 228 (3), 261–274. DOI: 10.1016/0022-3115(96)80004-3.
4. Rouxel, B., Bisor, C., De Carlan, Y., Courcelle, A., and Legris, A. Influence of the austenitic stainless steel microstructure on the void swelling under ion irradiation. EPJ Nuclear Sciences and Technologies, 2016, 2, 30 (1–11). DOI: 10.1051/epjn/2016023.
5. Voronin, V.I., Arbuzov, V.L., Bobrovskii, V.I., Danilov, S.E., Kozlov, K.A., Proskurnina, N.V., and Sagaradze, V.V. Peculiarities of radiation-induced processes in the Cr–Ni–Mo austenitic steels studied by neutron diffraction. Diagnostics, Resource and Mechanics of materials and structures, 2015, 5, 80–89. DOI: 10.17804/2410-9908.2015.5.080-089. Available at: http://dream-journal.org/issues/2015-5/2015-5_46.html
6. Sagaradze, V.V., Goshchitskii, B.N., Volkova, E.G., Voronin, V.I., Berger, I.F., and Uvarov, A.I. Evolution of the microstructure and microstresses in the 40Kh4G18F2 steel upon carbide aging. Physics of Metals and Metallography, 2011, 111, 80–90. DOI: 10.1134/S0031918X1101011X.
7. Bobrovskii, V.I., Afanasyev, S.V., Voronin, V.I., Kazantsev, V.A., Kataeva, N.V., Parkhomenko, V.D., Proskurnina, N.V., and Sagaradze, V.V. Initiation of the shape memory effect by fast neutron irradiation. Physics of Metals and Metallography, 2024, 125 (2) 211–216. DOI: 10.1134/S0031918X23602664.
8. Sagaradze, V.V., Voronin, V.I., Filippov, Yu.I., Kazantsev, V.A., Mukhin, M.L., Belozerov, E.V., Pecherkina, N.L., Kataeva, N.V., and Popov, A.G. Martensitic transformations γ–ɛ(α) and the shape-memory effect in aging high-strength manganese austenitic steels. Physics of Metals and Metallography, 2008, 106 (6), 630–640. DOI: 10.1134/S0031918X08120120.
9. Gavrilyuk, V.G. Raspredelenie ugleroda v stali [Distribution of Carbon in Steel]. Naukova Dumka Publ., Kyiv, 1987, 207 p. (In Russian).
10. Krivoglaz, M.A. X-ray and Neutron Diffraction in Nonideal Crystals, Springer, Berlin, Heidelberg, 1996, 466 p.
11. Dederichs, P.H. The theory of diffuse X-ray scattering and its application to the study of point defects and their clusters. Journal of Physics F: Metal Physics, 1973, 3, 471–496. DOI: 10.1088/0305-4608/3/2/010.
12. Dederichs, P.H. Diffuse scattering from defect clusters near Bragg reflections. Physical Review B, 1971, 4 (4), 1041–1050. DOI: 10.1103/PhysRevB.4.1041.
13. Hanna, R. and Haubold, H.-G. Diffuse X-ray scattering from self-interstitials in a general lattice. Acta Crystallographica Section A, 1982, 38, 814–817. DOI: 10.1107/S0567739482001661.
14. Huang, K. X-ray reflections from dilute solid solutions. Proceedings of the Royal Society A, 1947, 190 (1020), 102–117. DOI: 10.1098/rspa.1947.0064.
15. Chuistov, K.V. Modulirovannye struktury v stareyushchikh splavakh [Modulated Structures in Ageing Steels]. Naukova Dumka Publ., Kyev, 1975, 242 p.
16. Voronin, V.I., Berger, I.F., Proskurnina, N.V., and Goschitskii, B.N. Defects in a lattice of pure nickel subjected to fast-neutron irradiation followed by annealings: neutron-diffraction examination. Physics of Metals and Metallography, 2016, 117, 348–354. DOI: 10.1134/S0031918X16040141.
17. Voronin, V.I. Neutron diffraction study of samples of fuel element claddings made of austenitic steel. Journal of Nuclear Materials, 2021, 547, 152798. DOI: 10.1016/j.jnucmat.2021.152798.

Article reference