The Influence of boron on the structure and physicomechanical properties of high-entropy Ti30Zr25Hf15Nb20Ta10 alloy

Keywords

arc-melting, high entropy metal monoboride, X-ray crystal analysis, microstructure, mechanical properties.

Cite as

Myslyvchenko O. M., Gorban’ V. F., Samelyuk A. V., and Krapivka M. O. The Influence of boron on the structure and physicomechanical properties of high-entropy Ti₃₀Zr₂₅Hf₁₅Nb₂₀Ta₁₀ alloy. Physico­chemical Mechanics of Materials. 2022. 58(2), 129-132.

Abstract

Using the arc melting method, a high-entropy boride is obtained by adding boron powder to the Ti₃₀Zr₂₅Hf₁₅Nb₂₀Ta₁₀ alloy. X-ray diffraction analysis showed that Ti₃₀Zr₂₅Hf₁₅Nb₂₀Ta₁₀ alloy is single-phase body-centered cubic (BCC) structure and the main phase of Ti_15.8Zr_13.4Hf_7.8Nb_10.5Ta_5.3В_47.2 alloy is MeВ boride and a small amount of BCC and hexa­gonal close-packed (HCP) structures. The microstructure of the obtained alloys is ana­lyzed and it is shown that the addition of boron leads to the segregation of the constituent components of the alloy. The addition of boron increases the hardness from 3.5 to 33.5 GPa, the elastic modulus from 75 to 290 GPa, and the yield point from 1.06 to 10.28%.

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