Effect Of Intermediate Annealing On The Interface And Plasticity Of Cu-Ni-Si/Al-Mg-Si Clad Composite Wires

The aim of this article is to study the effect of intermediate annealing on the interface and plasticity of Cu-Ni-Si/Al-Mg-Si clad composite wires. Cu-Ni-Si/Al-Mg-Si clad composite wires were produced by cold drawing process and annealed at the temperature from 150 to 350 degrees C for 0.5 h. The presence of various intermetallic compounds in different temperature was detected by scanning electron microscope and EDS analyzer. The mechanical properties were measured by stretch test. The elongation increased with the temperature increment. The morphology of fracture showed that intermetallic compounds were tough and brittle. During the subsequent drawing, the intermetallic compounds were harmful to the overall structure of composite wires. The elongation cannot identify the plasticity of copper-clad aluminum (CCA) composite wires accurately.