针对Al-Zn-Mg-Cu-Li合金时效早期出现的硬度快速上升现象,用L-J势函数计算了该合金各种原子间、原子与空位间的相互作用势.结果表明:在Al-Zn-Mg-Cu合金中,以Mg/v聚集为主,还有Zn/v,Cu/v,Zn/Mg的复合聚集;加入较高量的Li以后,则以Li/v聚集为主,几乎没有Zn/Mg聚集形式.
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