Structure and properties of high-entropy TiCrFeNiGa alloy

Keywords

high-entropy alloy, powder metallurgy, electric arc melting, phase compo­sition, solid solution, microstructure, hardness, strength, Young’s modulus.

Cite as

Marych M. V., Bagliuk G. A., Honcharuk D. A., Soloviova T. O., and Golubenko A. A. Structure and properties of high-entropy TiCrFeNiGa alloy. Physico­chemical Mechanics of Materials. 2025. 61(1), 052-059.

DOI: https://doi.org/10.15407/pcmm2025.01.052

Abstract

A high-entropy Ti–Cr–Fe–Ni–Ga alloy with a near to equiatomic ratio of components was obtained from a mechanical mixture of Ti, Ni, Cr and ferrogallium pow­ders by the electric arc melting method. According to the results of the X-ray phase analysis of the obtained alloy, it was established that it consists of two solid substitution solutions. The first is formed on the basis of chromium and iron (β1-BCC1), the second – on the basis of iron and all other elements (β2-BCC2). The mass content of the β1 phase is within ~ 40%, and of the β2 phase – ~ 60%. The Rockwell hardness of the alloy is ~ 44 HRC. The main physi­co­mechanical properties of materials were determined by the method of automatic instru­mental microindentation. It is shown that the characteris­tics of the hardness HM (and, accordingly, the value of yield strength σ_S calcu­lated from Teibor’s relation) and Young’s modulus are at a fairly high level (HM = 9.71 GPa, E = 254.7 GPa, σ_S = 3.24 GPa), however, the alloy is characterized by a low level of plasticity.

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