含长周期堆垛有序结构的Mg-RE-Zn合金的热变形行为及微观组织特征高度复杂。为拓展该类合金的工程应用，本研究在变形温度为350~500 ℃、应变速率为0.001~1 s^-1条件下对固溶态Mg-10Gd-6Y-1.5Zn-0.5Zr合金进行热压缩实验，以研究该合金的热变形行为，构建其热加工图并确定热加工窗口；结合微观组织表征，研究该合金热变形过程中动态再结晶和长周期堆垛有序结构(LPSO)相扭折变形的相互作用。结果表明：该合金的流变应力随温度的升高和应变速率的降低而降低。在较高应变速率下，流变应力对温度的敏感性更高。在较低的温度下变形时，流变应力对应变速率的敏感性更高。基于Murty理论构建热加工图，发现在应变为0.7时存在2个最佳加工区域，位于变形温度400~450 ℃、应变速率0.001~0.027 s^-1和变形温度450~487 ℃、应变速率0.12~1 s^-1范围内。通过对所构建热加工图不同区域对应样品的微观组织表征(即再结晶晶粒的体积分数分析)，验证了热加工图的准确性。通过统计不同温度下流变曲线的软化应力(峰值应力-稳态应力)、再结晶晶粒体积分数和层状LPSO相扭折角，发现层状LPSO相的扭折变形程度随变形温度的升高而降低，再结晶晶粒体积分数随变形温度升高而升高，且层状LPSO相的扭折变形对动态再结晶具有抑制作用，流变曲线的软化应力受动态再结晶和层状LPSO相扭折变形的共同影响。

Mg-rare earth (RE)-Zn alloys with long period stacking ordered (LPSO) phases have received extensive attention in the past few years because of their excellent mechanical properties compared with conventional wrought Mg alloys. However, the corresponding hot deformation behaviors and microstructure characteristics of Mg-RE-Zn alloys are rather complex. An in-depth investigation into this would broaden their engineering applications. In this work, hot compression experiments of solutionized Mg-10Gd-6Y-1.5Zn-0.5Zr alloys at 350-500 ^oC and a strain rate of 0.001-1 s^-1 have been conducted to investigate the hot deformation behavior, construct the hot processing map, and determine the hot working window. Afterward, the interaction between dynamic recrystallization (DRX) and kink deformation of LPSO phase during hot deformation has been studied through microstructure characterization. Results show that the flow stress decreases with the increase of temperature and the decrease of strain rate. When deformed at a relatively high strain rate, the sensitivity of flow stress to temperature is evident. When deformed at a relatively low temperature, the sensitivity of flow stress to strain rate is prominent. The corresponding hot processing map was constructed based on Murty criterion. Under a strain of 0.7, two optimal processing areas are found at 400-450 ^oC (0.001-0.027 s^-1) and 450-487 ^oC (0.12-1 s^-1). The accuracy of the constructed hot processing map has been verified by using microstructure characterization (via volume fraction analysis of recrystallized grains) of deformed samples, which correspond to different regions in the constructed hot processing map. By analyzing the softening stress of the flow curve at different temperatures (peak stress minus state stress), DRX volume fraction and kinking angle of the lamellar LPSO phase, the degree of kink deformation of the lamellar LPSO phase decreases with the increase of deformation temperature. In addition, the DRX volume fraction increases with the increase of deformation temperature. Moreover, the kink deformation of the lamellar LPSO phase has an inhibitory effect on DRX and the softening stress of the flow curve could be jointly affected by DRX and the kink deformation of the lamellar LPSO phase.