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Erschienen in: Journal of Materials Engineering and Performance 5/2014

01.05.2014

Modeling Constitutive Relationship of Cu-0.4 Mg Alloy During Hot Deformation

verfasst von: Guoliang Ji, Guang Yang, Lei Li, Qiang Li

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 5/2014

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Abstract

For predicting the high-temperature deformation behavior in a Cu-0.4 Mg alloy, the true stress-strain data from isothermal hot compression tests on a Gleeble-1500 thermo-mechanical simulator, in a wide range of temperatures (500, 600, 700, 750, and 800 °C) and strain rates (0.005, 0.01, 0.1, 1, 5, and 10 s−1), were employed to develop the Arrhenius-type constitutive model and the artificial neural network (ANN) constitutive model. Furthermore, prediction ability of the two models for high-temperature deformation behavior was evaluated. Correlation coefficients (R) between the experimental and predicted flow stress for the Arrhenius-type constitutive model and the ANN constitutive model are 0.9860 and 0.9998, respectively, and average absolute relative errors between the experimental and predicted flow stress for these two models are 5.3967% and 0.7401%, respectively. Results show that the ANN constitutive model can accurately predict the high-temperature deformation behavior over a wider range of temperatures and strain rates, while for the Arrhenius-type constitutive model there is greater divergence in the regime of high strain rates and low temperatures.

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Metadaten
Titel
Modeling Constitutive Relationship of Cu-0.4 Mg Alloy During Hot Deformation
verfasst von
Guoliang Ji
Guang Yang
Lei Li
Qiang Li
Publikationsdatum
01.05.2014
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 5/2014
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-014-0912-0

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