High-entropy alloys (HE alloys) are defined as those composed of five or more principal elements in equimolar ratios or HE alloys may contain principal elements with the concentration of each element being between 35 and 5 at.-%. This has led to many alloy systems with simple crystal structures and extraordinary properties [1]. It is established that HEAs form different microstructures such as single-phase FCC, BCC, HCP microstructures as well as complex multi-phase microstructures. These alloys have attracted great research interest owing to promising properties observed in specific HEAs. For instance, the quinary equi-molar Cantor HEA CrMnFeCoNi possesses an exceptional fracture toughness of more than 200 MPa m1/2 at cryogenic temperatures, making it an ideal material for low-temperature applications. As usual, HEAs are processed by powder metallurgy [2], conventional casting [3,4], etc.
The proposed method can be used in the additive manufacturing of high-entropy alloys using gas metal arc welding (GMAW) with metal powder-cored wires (MPCW) with high filling factors. The filling of the wire contains components in equal amounts relative to each other. The method of welding using this MPCW provides an additive high-entropy alloy with the desired characteristics (Fig.1). The proposed method is superior in a number of indicators to such alternative methods of obtaining bulk alloy as melting in vacuum or argon-plasma melting, firstly due to the predominance in the molten volume of the workpiece.

Acknowledgments: The author is deeply grateful to the research team Dr.Dhanesh G. Mohan , Prof.Thierry Baudin, Dr. Mykola Skoryk , Prof. João Pedro Oliveira , Dr. Magdalena Speicher, Dr. Andery Klapatuk, Dr. Alex Gaivoronskiy, Dr. Valeriy Pozniakov, Dr. Dmytro Vedel
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