Features of phase and structure formation in obtaining high-entropy alloy of Fe-Ti-Cr-Mn-Si-C system from a powder mixture of ferroalloys

G.A. Bagliuk; M.V. Marych; Yu.O. Shishkina; A.A. Mamonova; O.M. Gripachevsky; S.F. Kyryliuk

doi:10.15330/pcss.23.3.620-625

Authors

G.A. Bagliuk Frantsevich Institute for Problems in Materials Science NAS of Ukraine, Kyiv, Ukraine
M.V. Marych Frantsevich Institute for Problems in Materials Science NAS of Ukraine, Kyiv, Ukraine
Yu.O. Shishkina Frantsevich Institute for Problems in Materials Science NAS of Ukraine, Kyiv, Ukraine
A.A. Mamonova Frantsevich Institute for Problems in Materials Science NAS of Ukraine, Kyiv, Ukraine
O.M. Gripachevsky Frantsevich Institute for Problems in Materials Science NAS of Ukraine, Kyiv, Ukraine
S.F. Kyryliuk Frantsevich Institute for Problems in Materials Science NAS of Ukraine, Kyiv, Ukraine

DOI:

https://doi.org/10.15330/pcss.23.3.620-625

Keywords:

high-entropy alloy, powder metallurgy, hot forging, ferroalloy, microstructure, crystal lattice, phase, carbide

Abstract

The peculiarities of the structure and phase composition of the high-entropy alloy of the TiCrFeMnSiC system obtained from the powder mixture of ferrotitanium, ferrochrome and ferrosilicon-manganese ferroalloys are considered in the work. The technological scheme of alloy production included joint grinding of the mixture in a planetary mill, consolidation of the blanks, their heating to 1100 ⁰C, hot forging on the arc press and subsequent annealing of hot-forged samples at 1200 ⁰C. According to the results of X-ray analysis of the obtained alloy, it was found that the main phase of the alloy is the BCC phase with the parameter of the cubic lattice a = 0.2868 nm, which is a solid solution based on alloying components of the original charge. The phase composition of the composite also recorded titanium carbide TiC with FCC lattice with the parameter a = 0.4319 nm, which corresponds to a stoichiometric composition of about TiC_0.6and a small amount of FCC phase of iron-chromium carbide (Cr, Fe)₂₃C₆ with lattice parameter a = 1.0645 nm. The material has a high hardness (up to 60-61 HRC), which can provide high resistance of this multicomponent alloy.

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