CuCrZr alloy has been acknowledged as one of the most promising candidate materials for the heat sink of plasma facing components in nuclear fusion devices with its excellent thermal conductivity and specific mechanical strength. For the safety concern, it is vital to provide appropriate safety assessment on these mechanical structures with CuCrZr alloy, such as divertor and blanket, under high strain rate loading conditions like displacement events, disruption, and so on. In this work, the dynamic compressive behavior of the CuCrZr alloy over wide range of strain rates and temperatures was investigated using the split Hopkinson pressure bar technique. Based on the experiment results, a constitutive equation is built by using Johnson-Cook model to describe the dynamical property of CuCrZr alloy. However, the results indicated that the influences of the strain, strain rate and temperature on the dynamic behavior are not independent. Therefore, a modified Johnson-Cook model was further developed to take the coupled effects of strain, strain rate and temperature into account. Compared with the original Johnson-Cook model, the modified Johnson-Cook model calculated results show good agreement with the experimental data.

CuCrZr合金以其优异的导热性和特定的机械强度而被公认为是核聚变设备中面向等离子体部件的散热器的最有希望的候选材料之一。出于安全考虑，至关重要的是在高应变率载荷条件（例如位移事件，破坏等）下，对含CuCrZr合金的机械结构（例如分流器和橡皮布）进行适当的安全评估。在这项工作中，使用分裂霍普金森压力棒技术研究了CuCrZr合金在较宽的应变速率和温度范围内的动态压缩行为。根据实验结果，利用Johnson-Cook模型建立了本构方程，描述了CuCrZr合金的动力学性能。然而，结果表明，应变，应变速率和温度对动力学行为的影响不是独立的。因此，进一步开发了改良的Johnson-Cook模型，以考虑应变，应变速率和温度的耦合效应。与原始Johnson-Cook模型相比，改进后的Johnson-Cook模型的计算结果与实验数据吻合良好。