Defects of macro- And microstructure of Cu-Fe system polymetallic materials produced by the hybrid additive-thermomechanical technique

Abstract

Metal matrix composite materials of Cu-Fe system were produced by alternating the electron-beam additive manufacturing and friction stir processing. The formation of a composite from wire filaments of C11000 copper and AISI 321 steel was studied. In a material obtained by an additive method after friction stir processing in a mixing zone the complex structure with alternation of layers with different sizes of steel particles in a copper matrix was formed. During the work, the formation of a number of defects in the micro- and macrostructure of the stir zone and the thermomechanically affected zone after processing was revealed. Macrostructure defects are mainly represented by large discontinuities in the lower part of the stir zone. Microstructure defects are inhomogeneous distribution of steel particles in copper and inhomogeneous layer structure.