CHANGING OF MECHANICAL PROPERTIES OF CANTOR ALLOY DURING ALLOYING

The prospects for using Cantor's high-entropy alloy CoCrFeNiMn in various high-tech industries are associated with a good combination of strength and plastic properties. Since 2004, when the Cantor alloy was first created and studied, a large amount of research has been carried out in leading scientific centers around the world on the effects of heat treatment and other methods of improving its mechanical properties. Over the past five years, the scientific school of SibSIU has been solving the problem of forming a high level of functional properties of high-entropy alloys by creating a nanocrystalline state of the surface and strengthening it by electron beam processing. The article notes the relevance of the traditional way of changing the properties of alloys by alloying. A brief review of the work of recent years by foreign researchers on modifying (improving) the mechanical properties of the Cantor alloy by alloying a number of elements has been carried out. Particular attention is paid to the alloying of Al, Nb, and Zr, which are widely used in the alloying of traditional alloys. When analyzing aluminum alloying work, it was noted that the replacement of manganese with aluminum provides microstructural stability and high functional properties over a wide temperature range. Attention is drawn to a promising strategy for producing Cantor's alloy with Al from metallurgical and mechanical engineering waste. This expands the range of practical applications of Cantor alloy. The advantages of Zr alloying are noted: fast induction melting, good chemical homogeneity, and a low melting point due to the formation of Zr eutectic with all components of the Cantor alloy. An increase in the mole fraction of Nb significantly increases the strength properties of the alloy and its hardness. This is largely due to the formation of the Laves phase. A good combination of strength and ductility during microalloying of Nb-carbon-containing Cantor alloy is associated with the formation of a fine-grained structure. Various strengthening mechanisms are reviewed and discussed.

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