Trace Element Effects on Microstructure and Mechanical Properties in Al-Cu-Li Alloy after Thermal Exposure

Zi Qiao Zheng; X.Z. Chen; Zhi Guo Chen; S.C. Li; Xiu Yu Wei

doi:10.4028/www.scientific.net/MSF.519-521.1931

Paper Titles

Effect of an Addition of Silver on the Age Hardening and the Formation of a Soft Surface Layer in an Al-12mass%Zn Alloy
p.1883

Influences of Iron Content and Solidification Rate on Mechanical Properties of 6022 Base Aluminium Alloys
p.1889

Effect of Heat Treatment Condition and Alloy Composition on Hydrogen Content in Al-Mg Alloys
p.1895

Work Hardening Behaviour of Heat-Treatable Al-Mg-Si-Alloys
p.1901

Research of Super Lattice Structure Parameters in Alloys of Al-Li-Mg System
p.1907

Delineating the Role of Second Phase Particles in AA6111
p.1913

Production of AA6082 Feedstock for Forming in the Semi-Solid State
p.1919

Hot Deformation Behaviour and Microstructure in Al-Cu-Li Alloy Containing Small Amount of Ag and Mg
p.1925

Trace Element Effects on Microstructure and Mechanical Properties in Al-Cu-Li Alloy after Thermal Exposure
p.1931

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Trace Element Effects on Microstructure and Mechanical Properties in Al-Cu-Li Alloy after Thermal Exposure

Abstract:

The effects of trace Ce, Ag on the microstructure and mechanical properties of Al-Cu-Li alloy after thermal exposure have been investigated. It’s found that the addition of Ce may lead to a slight increase in mechanical properties after thermal exposure at 107 . The stability of T1 phase is enhanced by independent Ag addition and the combined additions of Ag and Ce,which results in higher strength compared with Ag-free alloy at 150 thermal exposure. However, at 200 exposure, a great number of q¢ precipitates at the expense of T1 may be responsible for higher tensile strength in the Ag-free alloy than that of the independent addition of Ag and combined additions of Ag and Ce alloys.