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The effects of trace silver and magnesium additions on the microstructure and me chanical properties of the Al-Cu-Li alloys were investigated. The experimental results indicate that the effect of combined additions of Ag and Mg is the most obvious,the next is that of individual addition of Mg, and that of individual a ddition of Ag is the least. The addition of Ag and Mg in Al-Cu-Li alloy accele rates the precipitation of T1 and results in increasing the ageing hardness and strength. Prior cold work significantly improves the tensile strength by enhanci ng T1 precipitation in all the alloys investigated.
The effects of trace silver and magnesium additions on the microstructure and me chanical properties of the Al-Cu-Li alloys were investigated. The experimental results that the effect of combined additions of Ag and Mg is the most obvious, the next is that of individual addition of Mg, and that of individual a ddition of Ag is the least. The addition of Ag and Mg in Al-Cu-Li alloy accele rates the precipitation of T1 and results in increasing the aging hardness and strength. Prior cold work improves the tensile strength by enhanci ng T1 precipitation in all the alloys investigated.