It is impossible to obtain the forming limit curve (FLC) by full zone hydraulic forming test under quasi-static (QS) condition since the liquid will leak from the notches of the specimen once the pressure increases. In this study, a novel method is proposed to investigate the frictionless full zone hydraulic FLC of AA5A06 under high strain rate (HSR) condition based on the impact hydroforming technology (IHF). It is found that the FLC is increased significantly by IHF compared with the quasi-static rigid punch (QS-R) forming and the quasi-static hydraulic (QS-H) forming. Differentiating with the QS-H, the increase amounts of FLC at the biaxial tension zone and the tension-compression zone are notably different for IHF. Additionally, the theoretical calculations of FLC is conducted by using M-K model combining with Hill48 anisotropic yield criterion under QS and HSR conditions. The results calculated by the M-K model reasonably agree with the ones obtained from experimentation under QS and HSR condition, and a higher initial thickness ratio is assigned for HSR considering the neck postponing effect of inertia.

准静态（QS）条件下的全区液压成形试验无法获得成形极限曲线（FLC），因为一旦压力增加，液体就会从试样的缺口处泄漏。在这项研究中，提出了一种基于冲击液压成形技术 (IHF) 的新方法来研究 AA5A06 在高应变率 (HSR) 条件下的无摩擦全区液压 FLC。结果表明，与准静态刚性冲头 (QS-R) 成形和准静态液压 (QS-H) 成形相比，IHF 显着增加了 FLC。与 QS-H 不同，IHF 双轴拉伸区和拉伸压缩区的 FLC 增加量明显不同。此外，FLC的理论计算采用MK模型结合Hill48各向异性屈服准则在QS和HSR条件下进行。MK模型计算的结果与QS和HSR条件下的实验结果基本吻合，考虑到惯性的颈部延迟效应，为HSR分配了更高的初始厚度比。