Structure and properties of Cu/Mg composites after severe plastic deformation

Composite Cu/Mg conductors were obtained by hydrostatic extrusion (HE). Mechanical properties and resistivity of Cu/Mg composites were measured. Quasi-hydrostatic extrusion (QHE) and high pressure torsion (HPT) were applied to Cu/lMg composite for interface behavior studying. The microstructure was studied for initial state (Cu/lMg) and after different treatments. Severe plastic deformation during producing of Cu-Mg composites and further severe deformation leads to the formation of thin layers of Cu-based and Mg-based solid solutions at the interface due to mechanical alloying processes. It was shown than mechanical properties of composite after HE and QHE are better than for copper-magnesium combination.