Strength and oxidation resistance of Laves phase-containing refractory Nb-Ti-Zr-Cr alloys: Effect of chemical complexity

Yurchenko N, Panina E, Moskovskikh D, Kapustin D, Zhilina M, Shekhawat L, Novikov V, Geller A, Salishchev G, Zherebtsov S, Stepanov N (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Scripta Materialia Elsevier

Book Volume: 243

Article Number: 115978

DOI: 10.1016/j.scriptamat.2024.115978

Abstract

For a refractory Nb-Ti-Zr-Cr alloy system, we show that the effect of increasing chemical complexity, which is accepted as the main source for unique properties of high-entropy alloys, on the strength and oxidation resistance is sensitive to the particular elements added. A transition from pure Nb to NbTi and then to NbTiZr alloys that retained a single-phase body-centred cubic (bcc) structure improved the ambient-to-high-temperature strength and oxidation resistance at 1000 °C. However, the further addition of Cr that resulted in the Laves phase formation broke the trend. In the case of dual-phase bcc + Laves phase alloys, binary Nb100-xCrx alloys were much stronger at T > 600 °C than microstructurally similar multicomponent refractory complex concentrated alloys (RCCAs). Meanwhile, ternary (NbTi)100-xCrx alloys had the best oxidation resistance due to an exclusive formation of a protective Cr2O3 layer. This study emphasises opposite strategies for designing high-performance single-phase bcc and Laves phase-containing Nb-Ti-Zr-Cr RCCAs.

Involved external institutions

Belgorod National Research University (BelGU) / Белгородский государственный национальный исследовательский университет (НИУ БелГУ) RU Russian Federation (RU) Saint Petersburg State Marine Technical University / Санкт-Петербургский государственный морской технический университет RU Russian Federation (RU) National University of Science and Technology "MISIS" RU Russian Federation (RU)

How to cite

APA:

Yurchenko, N., Panina, E., Moskovskikh, D., Kapustin, D., Zhilina, M., Shekhawat, L.,... Stepanov, N. (2024). Strength and oxidation resistance of Laves phase-containing refractory Nb-Ti-Zr-Cr alloys: Effect of chemical complexity. Scripta Materialia, 243. https://dx.doi.org/10.1016/j.scriptamat.2024.115978

MLA:

Yurchenko, N., et al. "Strength and oxidation resistance of Laves phase-containing refractory Nb-Ti-Zr-Cr alloys: Effect of chemical complexity." Scripta Materialia 243 (2024).

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