Page 78 - MSAM-4-1

Materials Science in

Additive Manufacturing

ORIGINAL RESEARCH ARTICLE
Selective laser melting of ferritic/martensitic

oxide dispersion-strengthened steel: Processing,
microstructure, and mechanical properties

Maria Zaitceva* , Artem Borisov , Anatoliy Popovich, and Vadim Sufiiarov

Institute of Machinery, Materials and Transport, Peter the Great St. Petersburg Polytechnic University,
Saint Petersburg, Russia

Abstract

Oxide dispersion-strengthened (ODS) ferritic/martensitic steels have emerged
as a promising structural material for nuclear power applications due to their
high heat resistance. However, the fabrication of complex ODS steel components
remains a significant challenge. T his study presents the influence of the main
selective laser melting process parameters and heat treatment on the densification,
microstructure, and tensile properties at room and elevated temperatures of high
chromium ferritic/martensitic ODS steel strengthened with 0.25 wt.% yttrium oxide
(Y O ). The optimization of process parameters and platform pre-heating enabled
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the production of parts with a density above 98%. The application of pre-heating
*Corresponding author: allowed for higher scanning speeds to be used to achieve similar relative density
Maria Zaitceva and avoid cracking. Partial recrystallization after heat treatment was noted, affecting
(zajtsevamya@yandex.ru) grain morphology by increasing equiaxedness and decreasing size. X-ray analysis
Citation: Zaitceva M, Borisov A, was employed to determine the phase composition. However, the results were
Popovich A, Sufiiarov V. Selective ambivalent and required confirmation by other methods. The addition of 0.25 wt.%
laser melting of ferritic/martensitic
oxide dispersion-strengthened steel: Y O resulted in an ultimate tensile strength value of 978 MPa for the as-built material
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Processing, microstructure and at room temperature. At elevated temperatures, the properties are comparable to
mechanical properties. Mater Sci those of the base steel, indicating the necessity for further research.
Add Manuf. 2025;4(1):025060004.
doi: 10.36922/MSAM025060004
Received: February 6, 2025 Keywords: Selective laser melting; Oxide dispersion-strengthened steel; Tensile testing;
1st revised: February 28, 2025 Heat treatment; Additive manufacturing; ODS steel; Laser powder bed fusion
2nd revised: March 11, 2025
Accepted: March 12, 2025
Published online: March 24, 2025 1. Introduction
Ferritic/martensitic oxide dispersion-strengthened (ODS) steels are regarded as
Copyright: © 2025 Author(s).
This is an Open-Access article promising candidates for structural materials in next-generation nuclear reactors.
distributed under the terms of the This is attributed to their high radiation resistance and acceptable mechanical
Creative Commons Attribution properties at elevated temperatures. The desirable properties of ODS steels result
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License, permitting distribution,
and reproduction in any medium, from the presence of stable nanosized oxide particles, which inhibit grain boundary
provided the original work is and dislocation migration, thereby maintaining the material’s microstructural stability
properly cited. during service. In addition, the interfaces between matrix and dispersed oxides can
Publisher’s Note: AccScience serve as sinks for radiation-induced defects, which result in increasing irradiation
Publishing remains neutral with resistance. ODS steels based on high chromium ferritic/martensitic steels containing
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regard to jurisdictional claims in
published maps and institutional 9 – 12 wt.% Cr have garnered significant interest due to their proven performance in
affiliations. past fast reactors. Furthermore, ferritic/martensitic steels are highly resistant to void

Volume 4 Issue 1 (2025) 1 doi: 10.36922/MSAM025060004