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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Research on hot deformation behavior of Zr-4 alloy based on PSO-BP artificial neural network
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Research on hot deformation behavior of Zr-4 alloy based on PSO-BP artificial neural network

机译：基于PSO-BP人工神经网络的ZR-4合金热变形行为研究

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The high-temperature deformation behavior of Zr-4 alloy was investigated by using isothermal compression tests performed on the Gleeble-3500 thermomechanical simulator in the range of temperatures 750-1000 degrees C with strain rates of 0.001-10s(-1). Based on the above hot deformation conditions, the flow stresses are predicted efficiently and accurately by the PSO-BP artificial neural network model. The architecture of the network includes two hidden layers; the first hidden layer includes 15 neurons and the second 10 neurons. And the established model was further evaluated in terms of the correlation coefficient, absolute error, and average absolute relative error. The results show the measured and predicted flow stresses have a good agreement, which indicates that the PSO-BP neural network model can be widely used to analyze and predict the hot deformation behaviors at different experimental conditions. As revealed by micrographs, the phenomenon of spheroidization appears at a strain rate of 0.001s(-1) below the transformation temperature of the beta phase, while the lath-shaped microstructure is transformed into a microstructure that the grain is nearly equiaxed at the same condition mentioned above. However, the microstructure becomes uneven at a high strain rate above the transformation temperature of the b phase. (C) 2020 Elsevier B.V. All rights reserved.
机译：通过在高温750-1000摄氏度的温度范围内使用在GLEEBLE-3500热机械模拟器的等温压缩试验中，研究了ZR-4合金的高温变形行为。应变率为0.001-10s（-1）。基于上述热变形条件，通过PSO-BP人工神经网络模型有效且准确地预测流量应力。网络的架构包括两个隐藏层;第一个隐藏层包括15个神经元和第二个神经元。在相关系数，绝对误差和平均绝对相对误差方面进一步评估了建立的模型。结果表明，测量和预测的流量应对具有良好一致性的，这表明PSO-BP神经网络模型可广泛用于分析和预测不同实验条件下的热变形行为。如显微照片所揭示的，球形化的现象以低于β相的转化温度的0.001℃（-1）的应变速率，而Lath形微观结构被转化为晶粒几乎等于相同的微观结构上面提到的条件。然而，微观结构以高于B相的转化温度的高应变速率变得不均匀。 （c）2020 Elsevier B.v.保留所有权利。

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