Production of heterogeneous polymetallic based on Cu-Fe by multi-wire electron beam additive manufacturing.

This work deals with metastable and immiscible Cu-Fe alloys with different iron contents with a homogeneous microstructure were successfully prepared. Such a result was achieved using AISI 321 and C11000 steel and the multi-wire electron beam additive manufacturing. The samples under study were of different compositions with steel varying from 10 mass. % to 75 mass. %. The results showed that as the content of the second component increased, the volume fraction of stainless steel inclusions in the copper matrix increased, forming a heterogeneous melt. In the present work, a scheme of convective motion with diffusion elements in the melt pool at simultaneous feeding of two heterogeneous wires was constructed. During the melting process, the material with higher density occupies the lower position, displacing the less dense material to the upper part of the melt pool. Fluid phase separation processes due to surface tension also take place. After solidification, a heterogeneous melt is observed with the inclusion of copper in the steel matrix and steel in the copper matrix. After reheating, typical for electron beam additive manufacturing, secondary phases precipitate out of supersaturated solid solutions through the phenomenon of diffusion. [ABSTRACT FROM AUTHOR]