本文同时考虑了置换合金中的位错的整体行为和溶质原子与位错之间的交互作用,提出了一个描述合金中的锯齿屈服现象(即PL效应)的模型,根据这一模型,锯齿屈服出现在一定的应变速度-温度范围之内,在一定条件下,应变量超过一定值,锯齿屈服现象即消失,此模型已为工业用Cu-32wt％Zn合金的拉伸试验及应变速度突变试验所证实:模型所预示的温度和应变速度对锯齿波出现和消失的临界应变量的影响与实验结果吻合得很好。 In this paper, we also consider the overall behavior of dislocations and the interactions between solute atoms and dislocations in the alloy. A model describing the serrated yield phenomenon (ie, PL effect) in the alloy is proposed. According to this model, the serrations yield Appears in a certain strain rate - temperature range, under certain conditions, the strain exceeds a certain value, serrated yield phenomenon disappears, this model has been used for industrial Cu-32wt% Zn alloy tensile test and strain rate mutation test It is confirmed that the influence of temperature and strain rate predicted by the model on the critical strain of sawtooth wave appearing and disappearing agrees well with the experimental results.