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Article

Microstructure Evolution and Mechanical Properties of Refractory Mo-Nb-V-W-Ti High-Entropy Alloys

Institute of Materials and Joining Technology, Otto-von-Guericke University Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
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Metals 2020, 10(11), 1530; https://doi.org/10.3390/met10111530
Received: 23 September 2020 / Revised: 9 November 2020 / Accepted: 13 November 2020 / Published: 18 November 2020
(This article belongs to the Special Issue High Entropy Materials: Challenges and Prospects)
High-entropy alloys can either be defined as solid solution alloys containing at least five elements in equiatomic or near-equiatomic composition, or as alloys with high configurational entropies (larger than 1.5R), regardless of the number of elements involved. The present study reports on an alloy design route for refractory high-entropy alloys based on equiatomic Mo-Nb-V alloys with additions of W and Ti. In general, the work was motivated by Senkov et al. The aim of the experiments carried out was to produce a refractory high-entropy alloy with a single-phase structure. For this purpose, a systematic alloy design involving four- and five-element compositions was used. Scanning electron microscopy analysis has shown that Mo-Nb-V-xW-yTi (x = 0, 20; y = 5, 10, 15, 20, 25) is in fact a refractory high-entropy alloy with a body-centered cubic dendritic structure. Furthermore, the Ti-concentration of the experimental alloys was varied, to obtain the influence of Titanium on the microstructure development. Additionally, compressive tests at room temperature were carried out to evaluate the influence of the different alloying elements and the Ti-fraction on the mechanical properties. The observations of the present work are then compared to the published results on similar alloys from the working group of Yao et al. and critically discussed. View Full-Text
Keywords: high-entropy alloys; refractory metals; microstructure; mechanical properties high-entropy alloys; refractory metals; microstructure; mechanical properties
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MDPI and ACS Style

Regenberg, M.; Hasemann, G.; Wilke, M.; Halle, T.; Krüger, M. Microstructure Evolution and Mechanical Properties of Refractory Mo-Nb-V-W-Ti High-Entropy Alloys. Metals 2020, 10, 1530. https://doi.org/10.3390/met10111530

AMA Style

Regenberg M, Hasemann G, Wilke M, Halle T, Krüger M. Microstructure Evolution and Mechanical Properties of Refractory Mo-Nb-V-W-Ti High-Entropy Alloys. Metals. 2020; 10(11):1530. https://doi.org/10.3390/met10111530

Chicago/Turabian Style

Regenberg, Maximilian, Georg Hasemann, Markus Wilke, Thorsten Halle, and Manja Krüger. 2020. "Microstructure Evolution and Mechanical Properties of Refractory Mo-Nb-V-W-Ti High-Entropy Alloys" Metals 10, no. 11: 1530. https://doi.org/10.3390/met10111530

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