Experimental Investigation and Constitutive modeling for Hot Deformation Behavior of 2219 Al-alloy micro-alloyed with silver
Experimental Investigation and Constitutive modeling for Hot Deformation Behavior of 2219 Al-alloy micro-alloyed with silver
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DOI：
10.1115/1.4040099
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发表时间：
2018-05
影响因子：
1.2
通讯作者：
P. K. Mandal;P. Robi
中科院分区：
文献类型：
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作者：
P. K. Mandal;P. Robi
采用铸造工艺加工2219Al和2219Al+0.1wt%Ag合金。热压缩试验分别在恒定的真应变率和10−3至101s−1和300–500°C范围内的温度下进行。合金的流变应力随着银的添加而降低。两种合金的流变应力随着变形温度的降低和应变速率的增加而增加。使用双曲正弦关系开发了两种合金的峰值流动应力与变形温度和应变率相关的本构模型。 2219铝合金的热变形活化能随着银的添加而降低。峰值流应力的预测值和实验值的比较表明，92%的数据可以在±10%的偏差误差内进行预测，这表明所建立的本构关系具有良好的预测能力。
2219Al and 2219Al + 0.1 wt % Ag alloys were processed by casting route. The hot compression tests were carried out at constant true strain rates and temperatures in the range of 10−3to 101s−1and 300–500 °C, respectively. Flow stress of the alloy decreases with the addition of silver. The flow stress of both alloys increases with the decrease in deformation temperature and the increase in strain rates. Constitutive models correlating the peak flow stress with deformation temperature and strain rates for the two alloys were developed using hyperbolic–sine relationship. The activation energy for hot deformation of 2219 Al alloy decreases with the addition of silver. Comparison of the predicted and experimental values of peak flow stress reveals that 92% of the data could be predicted within a deviation error of ±10% indicating good predictive capability for the developed constitutive relationships.