研究了Ａｌ－Ｌｉ单晶体在不同温度和应变速率范围内产生的锯齿流变及其形态特征．开始产生锯齿流变的临界应变随着温度的升高（或应变速率的降低）先减小再增加．锯齿频率和应力变化幅度受温度和应变速率的影响，但不随应变单调变化．锯齿的类型与其产生的本质以及频率和应力幅度的变化没有明确的对应关系 The sawtooth rheological and morphological characteristics of Al-Li single crystal at different temperatures and strain rates were studied. The critical strain that begins to produce sawtooth rheology first decreases and then increases as the temperature increases (or the strain rate decreases). The sawtooth frequency and the magnitude of stress change are affected by temperature and strain rate, but do not change monotonically with strain. There is no clear correspondence between the type of sawtooth and the nature of its occurrence and the change in frequency and stress amplitude