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A Study of the Effect of Magnetic Scattering on the Analysis of the Nanostructure of Oxide Dispersion-Strengthened Steels by Small-Angle Neutron Scattering

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Abstract

A distinctive feature of oxide dispersion-strengthened alloys and steels, which provides a significant increase in heat resistance in comparison with traditional materials, is a significant number of homogeneously distributed nanoscale inclusions (oxides and clusters). For detailed characterization of such materials, a set of techniques is used, such as transmission electron microscopy, atom probe tomography, as well as small-angle scattering of X-rays and neutrons. The latter techniques make it possible to analyze the largest volume of material, while maintaining the ability to detect various nanoscale features. Since ferritic-martensitic oxide dispersion-strengthened steels are ferromagnetic materials, magnetic scattering has to be taken into account in the processing of small-angle neutron scattering data. The nanostructure of ferritic-martensitic oxide dispersion-strengthened steels with different alloying systems (different content of Cr, V, W, Al, and Zr) is investigated by small-angle neutron scattering. A comparison of the results of the study of the nanostructure of steels (oxide particles and clusters) in the ferromagnetic state with and without magnetic scattering is carried out. It is shown that oxide particles have a significantly higher magnetic contrast in comparison with nanoscale clusters. At the same time, the most accurate hardness values can be obtained by taking into consideration of both oxide inclusions and clusters.

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ACKNOWLEDGMENTS

The authors express their gratitude to Dr. P. Vladimirov from the Karlsruhe Institute of Technology (Germany) and Professor A. Kimura from Kyoto University (Japan) for providing samples of ODS steels.

Atom probe tomography analysis was performed on the equipment of the Center for Collective Use KAMIKS (http://kamiks.itep.ru/) of the National Research Center “Kurchatov Institute”.

Funding

The work was carried out with the financial support of the Russian Federation represented by the Ministry of Science and Higher Education of the Russian Federation (Agreement no. 075-15-2021-1352).

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Authors and Affiliations

  1. Kurchatov Complex for Theoretical and Experimental Physics, National Research Center “Kurchatov Institute”, 123182, Moscow, Russia

    S. V. Rogozhkin, A. V. Klauz, A. A. Khomich, A. A. Bogachev & A. A. Nikitin

  2. National Research Nuclear University “MEPhI”, 115409, Moscow, Russia

    S. V. Rogozhkin, A. V. Klauz, A. A. Khomich, A. A. Bogachev & A. A. Nikitin

  3. Joint Institute for Nuclear Research, 141980, Dubna, Russia

    Yu. E. Gorshkova & G. D. Bokuchava

  4. Institute of Physics, Kazan Federal University, 420008, Kazan, Russia

    Yu. E. Gorshkova

  5. Institute for Energy Security and Environmental Safety, Center for Energy Research, Budapest, Hungary

    L. Almásy

  6. Petersburg Nuclear Physics Institute named by B.P. Konstantinov of NRC “Kurchatov Institute”, 188300, Gatchina, Russia

    G. P. Kopitsa

  7. Institute of Silicate Chemistry named by I. V. Grebenshchikov, Russian Academy of Sciences, 199034, Petersburg, Russia

    G. P. Kopitsa

Authors
  1. S. V. Rogozhkin
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  2. A. V. Klauz
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  3. Yu. E. Gorshkova
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  4. G. D. Bokuchava
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  5. A. A. Khomich
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  6. A. A. Bogachev
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  7. A. A. Nikitin
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  9. G. P. Kopitsa
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Correspondence to S. V. Rogozhkin.

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Rogozhkin, S.V., Klauz, A.V., Gorshkova, Y.E. et al. A Study of the Effect of Magnetic Scattering on the Analysis of the Nanostructure of Oxide Dispersion-Strengthened Steels by Small-Angle Neutron Scattering. Phys. Metals Metallogr. 125, 93–99 (2024). https://doi.org/10.1134/S0031918X23602718

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