采用分离式霍普金森压杆试验研究了GH4169高温合金在温度20~400℃和应变速率1 000～3 000 s^-1时的流变应力-应变曲线，利用Zerilli-Armstrong（Z-A）本构模型描述了流变应力与应变的关系，确定了本构模型的参数，并对该模型进行试验验证。结果表明：GH4169高温合金存在明显的应变速率强化效应和温度软化效应，流变应力和应变呈近线性关系；所建立的Z-A本构模型能够准确地描述GH4169高温合金在不同温度和不同应变速率下的流变行为，其平均相对误差的平均值为2.65%。

The flow stress-strain curves of GH4169 superalloy at the temperatures of 20-400℃ and strain rates of 1 000-3 000 s^-1 were studied by split Hopkinson bar test. The relationship between stress and strain was described by Zerilli-Armstrong (Z-A) constitutive model, the parameters of constitutive model were determined, and the model was verified by experiments. The results show that GH4169 superalloy had obvious strain rate strengthening effect and temperature softening effect. The relationship between flow stress and strain was nearly linear. The established Z-A constitutive model accurately described the rheological behavior of GH4169 superalloy at different temperatures and different strain rates, and the average value of average relative errors of the model was 2.65%.