Ultrasonic Investigation of High-Entropy Al$_{0.5}$CoCrCuFeNi Alloy at Low Temperature

V. S. Klochko, A. V. Korniyets, I. V. Kolodiy, O. O. Kondratov, V. I. Sokolenko, V. I. Spitsyna, T. M. Tykhonovska, N. A. Yayes

Национальный научный центр «Харьковский физико-технический институт» НАН Украины, ул. Академическая, 1, 61108 Харьков, Украина

Получена: 09.02.2023; окончательный вариант - 28.02.2023. Скачать: PDF

The temperature dependence of the velocity propagation and the change in the attenuation of plane-polarized ultrasonic waves at a frequency of 50 MHz in the high-entropy Al$_{0.5}$CoCrCuFeNi alloy is investigated, using the ultrasonic spectroscopy in the temperature range 77–300 K. As found, the acoustic-characteristics’ anisotropy of the alloy is due to the growth texture. Significant attenuation of ultrasonic waves is revealed. Its temperature dependence is analysed. The effect of annealing on the studied acoustic characteristics is investigated. The estimate of values of the dynamic Young’s modulus, shear modulus, bulk modulus, and Poisson’s ratio is made.

Ключевые слова: high-entropy alloy, ultrasonic studies, anisotropy, elastic modulus.

URL: https://mfint.imp.kiev.ua/ru/abstract/v45/i04/0523.html

PACS: 43.20.Hq, 43.35.Cg, 61.72.Ff, 62.20.de, 62.20.dj, 62.65.+k, 62.80.+f

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