Structure-Phase Status of the High-Entropy AlNiNbTiCo Alloy

• Published in: Russian physics journal Vol. 67; no. 2; pp. 147 - 155
• Main Authors: Abzaev, Y. A., Medić, Ž., Koptsev, M., Laptev, R. S., Lider, A. M., Lomygin, A. D., Klopotov, A. A.
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.02.2024; Springer Nature B.V
• Subjects: Condensed Matter Physics; Convexity; Cubic lattice; Hadrons; Heavy Ions; High entropy alloys; Lasers; Mathematical and Computational Physics; Melt temperature; Nuclear Physics; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Structural stability; Theoretical; mechanical alloying; high-entropy alloys; X-ray diffraction techniques; AlNiNbTiCo alloy
• ISSN: 1064-8887; 1573-9228
• DOI: 10.1007/s11182-024-03101-8

Results of investigations of the structural state of the AlNiNbTiCo high-entropy alloy (HEA) obtained by mechanical synthesis of pure Al, Ti, Ni, Co, and Nb metals for 30, 40, and 50 min are presented. It is shown that the AlNiNbTiCo HEA belongs to stable structures near the melting temperature. By the method of inverse convex hulls (InveseHubWeb), the temperature interval of structure stability equal to ∆T = 1578–2935 K has been found, and the lattice is created by predicting the structures in the USPEX code. The amorphous AlNiNbTiCo HEA structural state is determined by the simple AlNiNbTiCo-3 cubic lattice. It is shown that the AlNiNbTiCo-3 lattice dominates in the AlNiNbTiCo HEA synthesized for 30, 40, and 50 min.