Abstract—

Uniaxial tensile tests of GH3128 on a Gleeble-3800 thermal-mechanical physical simulation machine were carried out under the temperature and stress of 850°C, 900°C and 950°C, 50 MPa, 65 MPa, 80 MPa and 100 MPa, respectively. According to the test data, two creep constitutive equations based on strain-time creep model and Norton power law creep model were obtained. By comparing the calculated values of the two constitutive equations with the test values, it could be found that the calculated values based on the Norton power law creep formula are closer to the experimental values than those based on the strain-time creep formula. Therefore, the constitutive equation based on Norton power law creep model could be used to estimate the creep deformation of the material at high temperature and high stress during operation.

中文翻译：

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基于GH3128高温蠕变试验的两个本构方程比较

摘要-

GH3128在Gleeble-3800热机物理模拟机上进行单轴拉伸试验，温度和应力分别为850℃、900℃和950℃、50 MPa、65 MPa、80 MPa和100 MPa . 根据试验数据，得到了基于应变-时间蠕变模型和诺顿幂律蠕变模型的两个蠕变本构方程。通过将两个本构方程的计算值与试验值进行比较，可以发现基于诺顿幂律蠕变公式的计算值比基于应变时间蠕变公式的计算值更接近实验值。因此，基于诺顿幂律蠕变模型的本构方程可用于估计材料在高温高应力下运行时的蠕变变形。