锻压技术

GH5188合金流变行为研究

英文标题：Study on plastic deformation behavior of GH5188 superalloy

单位：北京航空材料研究院

分类号：TG316

出版年,卷(期):页码：2013,38(6):116-121

摘要：

通过在Gleeble-3500型热模拟实验机上对GH5188合金进行等温热压缩实验，在变形温度为1030~1150 ℃、应变速率为0.01~10s-1的条件下，研究其热压缩变形的流变应力变化规律。在应力-应变结果的基础上，采用引入应变量因素的Arrhenius方程，建立了描述GH5188合金高温变形特性的本构方程。结果表明：变形温度和应变速率对GH5188合金流变应力影响显著，随变形温度升高和变形速率的降低，相同变形程度下合金的流变应力显著降低，并且在较低的应变下合金即可达到稳态流变状态。GH5188合金流变应力计算值和实验值相对误差较小，所建立的本构方程具有良好的预测能力。

The flow stress behavior of GH5188 superalloy during hot compression deformation conditions was investigated by isothermal hot compression on Gleeble-3500 hot simulation machine with the temperature range of 1030-1150 ℃ and strain rate range of 0.0110s-1. The constitutive equation based on the result of stress-strain, for describing the plastic deformation behavior of GH5188 superalloy during hot compression process was established using. the Arrhenius equation with strain value. The results show that the flow stress of GH5188 superalloy is greatly affected by temperature and strain rate. With the temperature increases or the strain rate decreases, the flow stress of GH5188 superalloy decreases greatly, and the plastic deformation gets in to the steady-going condition as soon as possible. The errors between calculated values and experimental values of GH5188 superalloy are nearly none. The constitutive equation has a good ability prediction.

基金项目：

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