In this research, hot deformation behavior of LZ91 Mg alloy was explored. Then, the active energy and the constitutive equation were evaluated and obtained. The results show that the compressive process of LZ91 alloy is a typical rheological process. The thermal activation energy of LZ91 alloy in temperature range of 260–380 °C is 172.2kJ/mol. The constitutive equation of it in the hyperbolic-sine function can be expressed as: . As deformation temperatures rise, the mount of β phase was reduced while α phase was precipitated from β phase due to Li break away from β phase. The reason of grain refinement and main softening mechanism can be credited to dynamic recrystallization.

本研究探讨了LZ91镁合金的热变形行为。然后，评估并获得有功能量和本构方程。结果表明，LZ91合金的压缩过程是典型的流变过程。LZ91合金在260–380°C的温度范围内的热活化能为172.2kJ / mol。它在双曲正弦函数中的本构方程可以表示为：。随着变形温度的升高，由于Li从β相脱离，β相的数量减少，而α相从β相中析出。晶粒细化和主要软化机理的原因可归因于动态再结晶。