Artificial neural network modeling to predict the hot deformation behavior of an A356 aluminum alloy

Prediction of the material flow behavior is an essential step to optimize the design of any forming process. In this context, artificial neural network (ANN) may be used as a reliable modeling method for simulating and predicting the flow behavior of materials under different thermomechanical conditions. In the present study, an ANN model has been established to estimate the high temperature flow behavior of a cast A356 aluminum alloy. A series of isothermal compression tests was conducted in the temperature range of 400-540 degrees C and strain rates of 0.001-0.1 s(-1). A feed-forward back propagation ANN with single hidden layer composing of 20 neurons was employed to simulate the flow behavior. The neural network has been trained using an in-house database obtained from hot compression tests. Finally, in comparison with a strain-dependent Arrhenius type constitutive equation, the reliability of the proposed ANN model has been evaluated using standard statistical indices. The results indicate that the trained ANN model is a robust tool to predict the high temperature flow behavior of cast A356 aluminum alloy. (C) 2013 Elsevier Ltd. All rights reserved.