为了分析ZK60镁合金和Al18B4O33w/ZK60复合材料的高温热变形行为,研究其高温流变应力与应变速率、变形温度之间的关系和组织情况,确定其应变速率敏感指数m和表观激活能Q.利用Gleeble-1500D热模拟试验机,在变形量为60%和不同温度、不同应变速率的条件下对其进行高温热压缩变形.研究表明:在温度为573～673 K和应变速率为0.001～0.1 s-1范围内,镁合金的应变速率敏感指数m值为0.14,复合材料的m值为0.12;合金的表观激活能Q值为226～254 kJ/mol;复合材料的Q值为254～283 kJ/mol.
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