Flow stress of wrought magnesium alloys during hot compression deformation at medium and high temperatures
Flow stress of wrought magnesium alloys during hot compression deformation at medium and high temperatures
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DOI：
10.1016/j.msea.2007.11.106
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发表时间：
2009-01
期刊：
影响因子：
6.4
通讯作者：
Yongbiao Yang;B. Li;Zhimin Zhang
中科院分区：
文献类型：
--
作者：
Yongbiao Yang;B. Li;Zhimin Zhang
在Gleeble 1500D热压缩试验机上，对AZ31和ZK60镁合金在不同温度和应变速率下的塑性进行了研究。结果表明，在相同的变形条件下，AZ31和ZK60的热模拟曲线形式不同。AZ31的总体曲线具有动态再结晶的特征，即流动应力先增加到峰值，然后下降到稳定状态。ZK60的大部分变形曲线都有一个明显的特征，即在0.2 in应变附近应力达到峰值，然后迅速下降到最低点，其余的曲线则具有动态再结晶的特征。通过分析可知，AZ31的变形温度应合理选择在250℃~400℃之间，而ZK60的变形温度应合理选择为200℃或400℃。
The plasticity of AZ31 and ZK60 magnesium alloys was studied by means of hot compression deformation tests on Gleeble 1500D machines at different temperatures and strain rates. The results indicate that the thermal simulation curves of AZ31 and ZK60 have different forms under the same deformation condition. The general curves of AZ31 have the character of dynamic recrystallization that the flow stress increases to a peak and then decreases to a steady state. Most deformation curves of ZK60 have the obvious character that around 0.2 in strain the stress reaches the peak and declines rapidly to the lowest, while the other curves have the character of dynamic recrystallization. From the analysis, a deformation temperature should reasonably be selected from 250°C to 400°C for AZ31, while it was concluded to be 200°C or 400°C for ZK60.