采用Gleeble-3800热模拟试验机进行压缩试验,在温度250～ 400℃,应变速率0.001 ～10s-1范围内,研究了变形Mg-Zn-Mn-Y合金中含有不同增强相(I相和W相)对该合金高温流变行为及变形过程中动态再结晶行为的影响.结果表明:只含I相的合金Ⅰ在较低温度下,表现出明显的加工硬化,峰值应力后发生断裂；在中高温度下,由于发生动态再结晶而表现出明显的流变软化.只含有W相的合金Ⅱ在中低温度下变形时,峰值应力之前出现加工硬化,随后随动态再结晶的发生而出现软化；在高温下,加工硬化不明显.含有I相合金在变形量较小时(0.1和0.3),其动态再结晶以常规动态再结晶为主,较大变形量时(0.5)的动态再结晶机制为连续动态再结晶.含有W相合金变形量较小时的动态再结晶方式为连续动态再结晶,变形量较大时为旋转动态再结晶.由于含有不同增强相的合金动态再结晶机制不同,含有I相合金在高温下变形可获得均匀细小的再结晶晶粒；而含有W相合金在高温下变形时,晶粒长大.
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