The kinetic Monte Carlo method based on the Multi-States Ising Model,was applied to simulate the effect of microelements on the microstructural evolution of Al-Ag alloys during initial aging stage.

Taking into account the influence on the lattice constant from temperature,the valence electronic structures of GP zones of η-form in the Al-Ag alloy,and the interfacial energy between GP zones of η-form and matrix were calculated by using empirical electron theory in solid and molecules(EET) and the extension of Becker model.

The valence electron structure of GP zone ? phase in Al-Ag alloy was calculated according to the “empirical electronic theory in solid”(EET), and the interface energy based on the information of the valence electron structure was calculated also.

Development of Al-Cu-Mg-Ag alloys;

Current trend of research on formation,mircostructure and compound of Ω phase in Al-Cu-Mg-Ag alloys is reviewed.

The Al-Cu-Mg-Ag alloys with different scandium contents were prepared by ingot metallurgy technology.

Ageing precipitation behavior of high purity Al-Cu-Mg-Ag alloy;

Effects of Cu and Mg content on microstructure and mechanical properties of Al-Cu-Mg-Ag alloy;

Homogenizing process and form of Er in Al-Cu-Mg-Ag alloy;

Based on TEM observation and tensile testing, the effect of the high temperature creep rupture testing on microstructure and mechanical properties of Al-Cu-Mg-Ag aluminum alloy was investigated.

Tensile property of an Al-Cu-Mg-Ag-Zr alloy at high temperature and effect of exposure at different temperatures on its mechanical property and corresponding microstructure were investigated.