Abstract：The effect of adding 1%Li on the microstructure and mechanical properties of Al- 7Zn- 2. 3Mg- 1. 5Cu alloy was studied. The addition of Li resulted in serious dendritic net and a large amount of Cu- rich phase in as- cast structure. The number of strengthening phase MgZn2 decreased and a large number of coarse Li3CuAl5 particles appeared in deformed structure. Although the density of alloy decreased, the mechanical properties deteriorated. The typical α- orientation and β- orientation texture of face- centered cubic metal were formed after rolling, in which the brass texture {011}<211> was the strongest.
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2018, Vol. 25 
