Temperature Dependence of the Acoustic and Mechanical Properties of Cast and Annealed High-Entropy Al$_{0.5}$CoCuCrNiFe Alloy

Yu. O. Semerenko$^{1}$, O. D. Tabachnikova$^{1}$, T. M. Tikhonovska$^{2}$, I. V. Kolodiy$^{2}$, O. S. Tortika$^{2}$, S. E. Shumilin$^{1}$, M. O. Laktionova$^{1}$

$^{1}$B.I. Verkin Institute for Low Temperature Physics and Engineering, NAS of Ukraine, 47 Nauky Ave., 61103 Kharkiv, Ukraine
$^{2}$National Science Center Kharkov Institute of Physics and Technology, NAS of Ukraine, 1 Akademicheskaya Str., 61108 Kharkov, Ukraine

Received: 26.08.2015. Download: PDF

For the first time, the acoustic and mechanical properties of the high-entropy Al$_{0.5}$CoCuCrNiFe alloy in the cast and annealed states are studied in the temperature range of 0.5—300 K. The structure of the cast and annealed high-entropy Al$_{0.5}$CoCuCrNiFe alloy is studied by means of optical microscopy, X-ray diffraction, scanning electron microscopy, and X-ray microanalysis. As found in the as-cast alloy, dendritic structure is formed. Annealing leads to a change in the structure and chemical composition of structural areas that causes a significant change in the acoustic and mechanical properties in the studied temperature range.

Key words: high-entropy Al$_{0.5}$CoCuCrNiFe alloy, strength, plasticity, acoustic absorption, dynamic modulus of elasticity.

URL: http://mfint.imp.kiev.ua/en/abstract/v37/i11/1527.html

DOI: https://doi.org/10.15407/mfint.37.11.1527

PACS: 43.35.Zc, 61.72.Ff, 61.72.S-, 62.40.+i, 64.70.kd, 68.70.+w, 81.40.Ef

Citation: Yu. O. Semerenko, O. D. Tabachnikova, T. M. Tikhonovska, I. V. Kolodiy, O. S. Tortika, S. E. Shumilin, and M. O. Laktionova, Temperature Dependence of the Acoustic and Mechanical Properties of Cast and Annealed High-Entropy Al$_{0.5}$CoCuCrNiFe Alloy, Metallofiz. Noveishie Tekhnol., 37, No. 11: 1527—1538 (2015) (in Russian)

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