2011•Rare Metals and Cemented CarbidesRequires access

Effects of Double Aging on Mechanical Properties and Corrosion Resistance of the Al-Cu-Li-Zr Alloy Containing Sc

Yunbin He

Abstract

The effects of double aging on mechanical properties and corrosion resistance of the Al-Cu-Li-Zr alloy containing Sc were studied by tensile test at room temperature,TEM and corrosion experiment.The results show that the alloy treated with double aging can show optimal comprehensive properties of strength and plasticity.Compared with the alloy treated with T8 peak aging,that with double aging has improved elongation even without its strength reduced.The main precipitated strengthening phase of the alloy is T1 phase.After double aging,fine and dispersive T1 phase precipitates in the grain interior,distributed uniformly in the alloy to improve its corrosion resistance.

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Key concepts: Materials science, Alloy, Corrosion, Elongation, Metallurgy, Ultimate tensile strength, Phase (matter), 6111 aluminium alloy