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采用Ｈｏｐｋｉｎｓｏｎ压杆装置，对４种时效处理的Ａｌ—Ｌｉ合金在冲击压缩试验时变形局部化产生的力学条件和微结构进行了研究．结果指出，４种处理的合金均产生两种类型的剪切带即形变剪切带和白色剪切带它们是在局部化过程中不同形变阶段下形成的两者无本质上的差别白色剪切带内未发生相变大应变和高应变率是产生力剪切带的必要条件，即材料在一定的高应变率下形变到一定程度时才能形成剪切带电镜研究表明，剪切带内无畸变等轴晶粒是再结晶的结果
The Hopkinson pressure bar device was used to study the mechanical conditions and microstructures of the Al-Li alloys aged by four aging treatments during the impact compression test. The results show that the four treated alloys produce two types of shear bands, ie, shear bands and white shear bands. They are essentially formed by the different deformation phases in the localization process. White shear The large strain and high strain rate in the belt are the necessary conditions to produce the force shear band, that is, the material can form shear banding electron microscopy when the material is deformed to a certain degree under a certain high strain rate. Distorted equiaxed grains are the result of recrystallization