Microstructure and properties of Cu-Fe deformation processed in-situ composite

Focus on the preparation process of Cu-14Fe deformation processed in-situ composite, by studying the stage of solidification, deformation, and heat treatment, the evolution of microstructure and the improvement of material properties have been investigated. The primary Fe phase distributed parallel on the longitudinal section and bent on the cross section under the shear stress, finally form the lamellar fiber structure in the deformation process. With cumulative cold deformation strain, the enhancement of tensile strength is attributed to the combined action of fiber strengthening, dislocation strengthening and precipitation strengthening. The strengthening mechanism of Cu-Fe deformation processed in-situ composites follows Hall-Petch relation with heavy strain. Due to the resistivity depends on the influence of impurity scattering and dislocation scattering, the intermediate heat treatment can improve conductivity effectively.