Hot compression deformation behavior of the Mg-Al-Y-Zn magnesium alloy
Hot compression deformation behavior of the Mg-Al-Y-Zn magnesium alloy
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DOI：
10.1016/s1001-0521(08)60099-6
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发表时间：
2008-04-01
期刊：
影响因子：
8.8
通讯作者：
Zhang Hong
中科院分区：
文献类型：
--
作者：
Fang Xiya;Yi Danqing;Zhang Hong
在Gleeble-1500热模拟试验机上，研究了Mg-Al-Y-Zn镁合金在523 ~ 673 K温度范围内，应变速率为0.001 ~ 1 s（-1）的热压缩变形行为。分析了流变应力、应变速率和变形温度之间的关系，计算了变形激活能和应力指数。研究了合金在不同条件下的组织演变。结果表明，流变应力的最大值随变形温度的降低或应变速率的增大而增大。在本变形条件下，合金发生了动态再结晶（DRX），这是高温变形的主要软化机制。变形温度和变形量对合金的显微组织有显著影响。
The hot deformation behavior of a Mg-Al-Y-Zn magnesium alloy was investigated by hot compressive testing on a Gleeble-1500 thermal simulator at the temperature ranging from 523 to 673 K with the strain rate varying from 0.001 to 1 s(-1). The relationships among flow stress, strain rate, and deformation temperature were analyzed, and the deformation activation energy and stress exponent were calculated. Microstructure evolution of the alloy under different conditions was examined. The results indicated that the maximum value of the flow stress increased with the decrease of deformation temperature or the increase of strain rate. Under the present deformation conditions, dynamic recrystallization (DRX) occurred in the alloy, which was the main softening mechanism during deformation at elevated temperature. The deformation temperature and strain had significant effects on the microstructure of the alloy.