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研究不同时效状态的二元Al-Li单晶体不同温度的变形行为,结果表明:固溶态和欠时效态在温度不超过293K的反常流变行为,是由Li原子的动态应变时效作用引起的;而温度高于293K,K-W锁等决定了欠时效态的形变硬化行为;过时效态的临界分切应力及形变硬化率,随温度的变化可能与Orowan机制和Al3Li粒子被位错环切割有关。
The deformation behavior of binary Al-Li monocrystals with different aging states was studied. The results show that the anomalous rheological behavior of solid solution and under-aging at temperatures up to 293K is caused by the dynamic strain-aging effect of Li atoms. While the temperature is higher than 293K, the K-W lock determines the under-aged deformation hardening behavior; the critical shear stress and the deformation hardening rate of the over-aged condition may be related to the Orowan mechanism and Al3Li particles dislocation ring cutting related.