为了研究超高应变速率激光冲击对AZ31 镁合金温成形性能的影响，采用钕玻璃脉冲激光器(脉冲宽度为20 ns，激光功率密度为1.53 GW/cm2)进行AZ31 镁合金薄板室温激光冲击成形(LSF)和200 ℃时激光冲击温成形(WLSF)实验研究及模拟分析。结果表明：AZ31 交叉轧制薄板具有良好的超高应变速率WLSF 能力，可实现温成形和改性双重效应，表层形成高幅残余压应力和高密度位错，WLSF 表面比LSF 具有更稳定的残余压应力，超高应变速率激光冲击和动态再结晶可能是纳米晶形成的主要原因，并分析LSF 和WLSF 试样表面形貌和粗糙度以及表面残余应力分布。

In order to study the effects of laser shock with ultra-high strain rate on the warm forming properties of magnesium alloy, experimental research and simulation analysis of laser shock forming (LSF) and warm laser shock forming (WLSF) at 200 ℃ are carried out on AZ31 alloy sheets with Nd: glass laser with power density of 1.53 GW/cm2 and pulse width of 20 ns. The results show that AZ31 alloy sheets have good WLSF ability with ultrahigh strain rate and can achieve double effsect of warm forming and modification. High value residual compressive stress and high density dislocations are generated on the surfaces of the samples. Residual compressive stress induced by WLSF is more stable than that induced by LSF. The laser shock with the ultra-high strain rate and dynamic recrystallization may contribute to the formation of nano-grains. Surface morphology and roughness and surface residual stress distribution of LSF and WLSF samples are also analyzed.