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通过力学性能试验和显微组织观察研究了２１９５合金中微量Ａｇ和Ｍｇ的合金化作用．结果表明，在２１９５合金中由于Ａｇ和Ｍｇ的添加使Ｔ１相的析出速度加快，析出密度增加，并以Ｔ１相为主要强化相，时效强化效果最大．只含Ｍｇ的合金在时效时析出ＧＰ区，θ′和Ｔ１相，θ′相为主要时效强化相．只含Ａｇ的合金在峰时效时析出粗大的Ｔ１和θ′相，强化效果较小．由于铃木效应促使Ａｇ和Ｍｇ原子在｛１１１｝α面上的层错中偏聚以及Ａｇ－Ｍｇｃｌｕｓｔｅｒｓ对Ｌｉ和Ｃｕ原子扩散的催化作用为Ｔ１相形核提供了结构和成份条件．
The alloying effect of trace Ag and Mg in 2195 alloy was studied by mechanical properties test and microstructure observation. The results show that the addition of Ag and Mg accelerates the precipitation rate of T1 phase and increases the precipitation density, and T1 phase is the main strengthening phase in 2195 alloy. The aging strengthening effect is the largest. The Mg-only alloy precipitates the GP region, the θ ’and the T1 phases, and the θ’ phase as the main aging-enhanced phase when aged. The Ag-containing alloy precipitates coarse T1 and θ ’phases at peak aging, resulting in less strengthening. The Suzuki effect promotes the segregation of Ag and Mg atoms in the layer faults on the {111} α surface and the catalytic action of Ag-Mgclusters on the diffusion of Li and Cu atoms provides the structural and compositional conditions for the T1 phase nucleation.