Issues »  Volume 39, Issue 12

Structural State of Cast High-Entropy Alloys with F.C.C. Lattice and Its Influence on the Hardness Characteristics

O. M. Myslyvchenko, V. F. Gorban’, M. O. Krapivka

I. M. Frantsevich Institute for Problems in Materials Science, NAS of Ukraine, 3 Academician Krzhyzhanovsky Str., UA-03142 Kyiv, Ukraine

Received: 17.07.2017. Download: PDF

The theoretical atom-size difference is calculated for crystal lattice of single-phase high-entropy alloys, which are consisting of the elements with close atomic radius or the elements with significantly different ones. X-ray diffraction patterns of these alloys are obtained and analysed. Based on the data of peak full-width at half-height of its maximum, an influence of magnitude of lattice distortions and size of coherent-scattering regions on physical broadening of diffraction lines is calculated. As shown, the increasing of theoretical atom-size difference causes decreasing of coherent-scattering regions as well as increasing of distortions in crystal lattice that leads to solid-solution strengthening and, therefore, to increasing of its hardness.

Key words: high-entropy alloy, lattice distortions, size of coherent-scattering regions, full-width at half-maximum (FWHM), hardness.

URL: http://mfint.imp.kiev.ua/en/abstract/v39/i12/1589.html

DOI: https://doi.org/10.15407/mfint.39.12.1589

PACS: 61.05.cp, 61.66.Dk, 61.72.S-, 62.20.Qp, 64.75.Ef, 81.05.Bx, 81.40.Cd

Citation: O. M. Myslyvchenko, V. F. Gorban’, and M. O. Krapivka, Structural State of Cast High-Entropy Alloys with F.C.C. Lattice and Its Influence on the Hardness Characteristics, Metallofiz. Noveishie Tekhnol., 39, No. 12: 1589—1598 (2017) (in Russian)

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