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采用Gleeble-1500热模拟实验机研究铝钨合金在变形温度为450℃~540℃、应变速率为0.001s-1~1s-1下单道次压缩过程的高温流变行为。基于BP神经网络建立铝钨合金本构关系模型。在该模型中,输入变量为应变、应变速率和变形温度,输出变量为流变应力。与传统方法相比,该本构关系模型的测试数据可以为描述整个变形过程提供一个很好的代表性,也为开发铝钨合金本构关系提供方便和有效的途径。
The high temperature rheological behavior of aluminum-tungsten alloy during single pass compression at deformation temperature of 450 ℃ ~ 540 ℃ and strain rate of 0.001 s-1 ~ 1 s-1 was studied by Gleeble-1500 thermal simulation experiment machine. Establishing the constitutive model of Al - W alloy based on BP neural network. In this model, the input variables are strain, strain rate and deformation temperature, and the output variables are flow stress. Compared with the traditional method, the test data of this constitutive relation model can provide a very good representation for describing the whole deformation process and provide a convenient and effective way for the development of the constitutive relation of aluminum-tungsten alloy.