Paper Titles
Preface
On the Formation of Martensite in Low-Carbon Alloy Steel Wire Rod for Welding Applications during Slow Continuous Cooling
p.3
The Micromechanical Properties of CoCrFeNiMnVx (х = 0-2) High-Entropy Alloys
p.11
Phase Composition, Microhardness, Mechanical and Acoustic Properties of Nonequiatomic Medium-Entropy Alloys FexMn80-xCo10Cr10 (x = 40 and 50) in Different Structural States
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Effect of Power and Scanning Speed on the Morphology of a Single Track Melt Pool under Dynamic Laser Beam Focusing in Additive Manufacturing
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Effect of Post Weld Heat Treatment and Filler Metal on the Microstructure, Mechanical Properties, and Corrosion Resistance of Dissimilar Welds between Carbon Steel and Stainless Steel
p.35
Studying the Effect of Scandium on the Formation of a Quasicrystalline Phase in Al-Cu-Fe Ingots
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Structure and Properties of Experimental Low-Cost Titanium Alloys
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Structure and Properties of Heat-Resistant FeNiCrCuAl High-Entropy Alloys
p.59

The Micromechanical Properties of CoCrFeNiMnVx (х = 0-2) High-Entropy Alloys

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Abstract:

The microhardness of CoCrFeNiMnVx (х = 0-2) high-entropy alloys (HEAs) was measured in the temperature range 77-293 K. At x ≤ 0.4, a significant monotonic increase in microhardness occurs with decreasing temperature, which indicates the thermally-activated character of plastic deformation of the material under the indenter. At x = 0.5, as well as at x = 0.75 and 0.85, athermal behavior of microhardness was detected in the ranges of 200-293 K and 150-293 K, respectively. The latter is apparently associated with the appearance in the indicated alloys, along with the FCC phase, of precipitates of the hard intermetallic sigma phase, which are athermal obstacles to the motion of dislocations. For the first time the microhardness of the sigma phase in the range of 77-293 K was measured; at 293 K and 77 K it was about 9.5 GPa and 12.5 GPa, respectively, which is approximately 5 times higher than the microhardness of the FCC alloy with x = 0.25.

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Periodical:

Key Engineering Materials (Volume 1041)

Pages:

11-17

DOI:

https://doi.org/10.4028/p-ZcxQA8

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Online since:

February 2026

Authors:

Hanna Rusakova*, Larysa Fomenko, Serzh Lubenets, Mykhailo Tikhonovsky, Igor Kislyak, Elena Tabachnikova, Yi Huang, Terence G. Langdon

Keywords:

High-Entropy Alloy, Intermetallic Sigma Phase, Low Temperatures, Microhardness

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] C. Varvenne, A. Lugue, W.A. Curtin, Theory of strengthening in fcc high entropy alloys, Acta Mater. 118 (2016) 164-176.

DOI: 10.1016/j.actamat.2016.07.040

Google Scholar

[2] B. Yin, F. Maresca, W.A. Curtin, Vanadium is an optimal element for strengthening in both fcc and bcc high-entropy alloys, Acta Mater. 188 (2020) 486-491.

DOI: 10.1016/j.actamat.2020.01.062

Google Scholar

[3] N.D. Stepanov, D.G. Shaysultanov, G.A. Salishchev, M.A. Tikhonovsky, E.E. Oleynik, A.S. Tortika, O.N. Senkov, Effect of V content on microstructure and mechanical properties of the CoCrFeMnNiVx high entropy alloys, J. Alloys Comp. 628 (2015) 170-185.

DOI: 10.1016/j.jallcom.2014.12.157

Google Scholar

[4] G.A. Salishchev, M.A. Tikhonovsky, D.G. Shaysultanov, N.D. Stepanov, A.V. Kuznetsov, I.V. Kolodiy, A.S. Tortika, O.N. Senkov, Effect of Mn and V on structure and mechanical properties of high-entropy alloys based on CoCrFeNi system, J. Alloys Comp. 591 (2014) 11-21.

DOI: 10.1016/j.jallcom.2013.12.210

Google Scholar

[5] N. Ali, L. Zhang, D. Liu, H.W. Zhou, K. Sanaullah, C. Zhang, J. Chu, Y. Nian, J. Cheng, Strengthening mechanisms in high entropy alloys: A review, Mater. Today Commun. 33 (2022), 104686.

DOI: 10.1016/j.mtcomm.2022.104686

Google Scholar

[6] W. Jiang, Y.T. Zhu, Y.H. Zhao, Mechanical properties and deformation mechanisms of heterostructured high-entropy and medium-entropy alloys: A review, Front. Mater. 8 (2021), 792359.

DOI: 10.3389/fmats.2021.792359

Google Scholar

[7] H. Park, S. Son, S. Y. Ahn, H. Ha, R.E. Kim, J.H. Lee, H.M. Joo, J.G. Kim and H.S. Kim, Hyperadaptor; temperature-insensitive tensile properties of Ni-based high-entropy alloy across a wide temperature range, Mater. Res. Lett. 13 (2025) 348-356.

DOI: 10.1080/21663831.2025.2457346

Google Scholar

[8] P. Wu, K. Gan, D. Yan, Z. Li, The temperature dependence of deformation behaviors in high-entropy alloys: A review, Metals 11 (2021) 2005.

DOI: 10.3390/met11122005

Google Scholar

[9] D. Nix, H. Gao, Indentation size effects in crystalline materials: a law for strain gradient plasticity, J. Mech. Phys. Solid. 46 (1998) 411-425.

DOI: 10.1016/s0022-5096(97)00086-0

Google Scholar

[10] S. Suresh, Graded materials for resistance to contact deformation and damage, Science 292 (2001) 2447-2451.

DOI: 10.1126/science.1059716

Google Scholar

[11] Y.P. Cao, J. Lu, A new scheme for computational modeling of conical indentation in plastically graded materials, J. Mater. Res. 19 (2004) 1703-1716.

DOI: 10.1557/jmr.2004.0239

Google Scholar

[12] H.V. Rusakova, L.S. Fomenko, S.N. Smirnov, A.V. Podolskiy, Y.O. Shapovalov, E.D. Tabachnikova, M.A. Tikhonovsky, A.V. Levenets, M.J. Zehetbauer, E. Schafler, Low temperature micromechanical properties of nanocrystalline CoCrFeNiMn high entropy alloy, Mater. Sci. Eng. A 828 (2021) 142116.

DOI: 10.1016/j.msea.2021.142116

Google Scholar

[13] E.D. Tabachnikova, А.V. Podolskiy, M.O. Laktionova, N.A. Bereznaia, M.A. Tikhonovsky, A.S. Tortika, Mechanical properties of the CoCrFeNiMnVx high entropy alloys in temperature range 4.2-300 K, J. Alloys Comp. 698 (2017) 501-509.

DOI: 10.1016/j.jallcom.2016.12.154

Google Scholar