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中文摘要：
在Gleeble-1500热模拟机上对Zr-4合金进行了热压缩试验,研究了其在750-950℃和0.005-50 s-1条件下的热变形行为。分析了其不同温度、不同应变速率下的流动应力、组织变化规律和变形机理。结果表明,在试验温度范围内,随着温度的升高,Zr-4合金的再结晶过程更易进行;Zr-4合金为应变速率敏感合金;热变形过程的流变应力可用双曲正弦本构关系来描述,平均激活能为377.79 kJ/mol.
英文摘要：
The hot deformation behaviors of Zr-4 alloy under the temperature range of 750 - 950 ℃ and strain rate range of 0. 005 -50 s^1 were studied by use of hot compressing test on a Gleeble-1500 simulator. The flow stress behavior, microstructure change and deformation mechanism in different temperature and strain rate were analyzed. The results show that the dynamic recrystallization easily occurrs with increase of deformation temperature, and Zr-4 alloy are sensitive to strain rate. The flow behavior can be described by the hyperbolic sine constitutive equation, and the average activation energy is 377.79 kJ/mol.
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