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材料工程  2006 

ZK60镁合金高温压缩道次间软化规律的研究

, PP. 8-11

Keywords: ZK60镁合金,高温压缩,亚动态再结晶

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Abstract:

在Gleebe-1500热力模拟机上,采用双道次间隙式等温热压缩实验,对ZK60镁合金双道次热变形过程中的道次间软化规律进行了研究。变形温度为200℃和300℃,应变速率为0.005s-1和0.05s-1,道次间隙停留时间在1~300s之间变化。结果表明材料在变形道次间的主要静态软化机制是亚动态再结晶,建立了亚动态再结晶动力学模型,相应的亚动态再结晶激活能约为50.12kJ/mol,远小于动态再结晶激活能。

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