Microstructure and mechanical properties of spray-formed Cu-1.2Cr alloy
(1.中南大学 材料科学与工程学院，长沙 4100832.Institute of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China3.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China)
Abstract: The copper alloys with high strength and high conductivity are important functional materials with full of potential appliances. Cu-1.2%Cr(mass fraction) alloy was prepared successfully by spray forming. The effects of the thermo-mechanical treatments on the microstructure and mechanical properties of the alloy were studied and the strengthening mechanism was analyzed. The results show that the spray-formed Cu-1.2%Cr alloy has excellent mechanical properties with optimized thermo-mechanical treatments and the main strengthening mechanism is the precipitation of the coherent chromium precipitates, which is resulted from the decomposition of the supersaturated solid solution.
Key words: Cu-Cr alloys； spray forming； thermo-mechanical treatment； coherent strengthening