The Structure Organization and Defect Formation of Cu-Al System Polymetallic Materials Produced by the Electron-Beam Additive Technology

In the work, the structure formation of polymetallic samples from copper and an aluminum alloy produced by the electron-beam additive technology is studied. The basic types of defects are defined and the conditions of their formation are identified. Structural features of a gradient transition zone from copper to the zone of a solid solution of aluminum in copper, and to the zone of intermetallic phase formation are investigated. The complex and heterogeneous structure of the gradient zone is revealed. It is found that different cracks occur during the formation of large intermetallic zones even in the modes with optimal parameters.