Prediction of Stable Composition for High-Entropy Refractory Alloys
A. B. Melnick, V. K. Soolshenko
G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03680 Kyiv-142, Ukraine
Received: 05.07.2016. Download: PDF
The common approach for evaluation of stability of multicomponent substitutional solid solutions using thermodynamic, mechanical, and topological parameters of the constituent elements is developed. The high-temperature systems based on refractory elements (W, Ta, Mo, Nb, V, Ti, Zr, Hf, Cr) are investigated using this approach. Optimal compositions for high-entropy alloys are obtained, and influence of various factors in the formation of stable alloys is described. As shown, the most resistant alloys have non-equiatomic element-contents’ ratios. The agreement between element distribution in experimental alloys and predicted stable compositions are obtained for the W— Ta—Mo—Nb and W—Ta—Mo—Nb—V systems.
Key words: high-entropy alloys, refractory alloys, solid solution, thermodynamics.
PACS: 05.10.Ln, 05.70.Ce, 64.10.+h, 65.40.gd, 81.05.Zx, 81.30.Bx, 81.30.Fb, 82.60.Lf
Citation: A. B. Melnick and V. K. Soolshenko, Prediction of Stable Composition for High-Entropy Refractory Alloys, Metallofiz. Noveishie Tekhnol., 38, No. 10: 1395—1405 (2016)