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 serration flow and its morphology of Al-Li single crystal were investigated under different temperatures(T) and strain rates(ε). The critical strain of serration(εc) first increased and then decreased with increasing T or decreasing ε. Temperature and strain rate have some influences on the frequency and amplitude of serration which changed irregularly with deformation. The relations between the type of the serration and the mechanisms for the occurrence of serration, and the changes of frequency and amplitude were obscure in the Al-Li single crystal. Correspondent: TIAN Baohui, Departinent of Materials, Beijing University of Aeronaulics and Astronautics,Beijing 100083
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