Abstract
A Cu-0.3Fe-0.3Mn-0.16 P alloy with high strength and conductivity has been successfully prepared. The influence of integrated multistage thermo-mechanical treatment on the microstructure evolution and properties of the alloy was investigated experimentally. The results reveal substantial production of dislocations and nanosized MnFeP precipitates in the matrix, endowing the alloy with outstanding tensile strength (691 MPa), yield strength (662 MPa), and electrical conductivity (68.0% IACS). Moreover, the Cu-Fe-Mn-P alloy demonstrates excellent softening resistance, particularly at the elevated temperature of 525 °C. The yield strength of the alloy is attributed to strain strengthening, precipitation strengthening, and fine grain strengthening (in decreasing order of importance). Above 600 °C, the alloy exhibited softening behavior marked by recrystallization and the coarsening of precipitates. This research should assist in the development of innovative high-strength and high-conductivity Cu-Fe-Mn-P alloys.
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