2012
DOI: 10.1108/15736101211251185
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Prediction of flow stress during hot deformation of MA'ed hybrid aluminium nanocomposite employing artificial neural network and Arrhenius constitutive model

Abstract: Purpose -The aim of this paper is to develop a suitable artificial neural network (ANN) model that fits best in predicting the experimental flow stress values to the closet proximity for mechanically alloyed Al6063/0.75Al2O3/0.75Y2O3 hybrid nanocomposite. Design/methodology/approach -The ANN model is implemented on neural network toolbox of MATLAB w using feed-forward back propagation network and logsig functions. A set of 80 training data and 20 testing data were used in the ANN model. The layout of the netwo… Show more

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Cited by 8 publications
(7 citation statements)
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“…There may be much reason for instability such as adiabatic shear band, cracks grain boundary sliding etc. This was supported by earlier studies [15,[22][23]. Fig.10 shows the shear band localization in the prepared nanocomposites after deformation test.…”
Section: Constitutive Model and Verification Of Modelsupporting
confidence: 84%
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“…There may be much reason for instability such as adiabatic shear band, cracks grain boundary sliding etc. This was supported by earlier studies [15,[22][23]. Fig.10 shows the shear band localization in the prepared nanocomposites after deformation test.…”
Section: Constitutive Model and Verification Of Modelsupporting
confidence: 84%
“…The appearances of the obtained curves have same similarity in all three test conditions. Similar observations were shown in [15][16]. Initially in the S-S curves stress linearly increases with strain rate due to work hardening (WH) effect and furthermore flow stress is suddenly reduced with strain rate increases due to recovery and recrystallization effect [15].…”
Section: Table 2 Hot Deformation Process Parameters Hot Deformation supporting
confidence: 72%
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“…During Stage III, the stress drops steeply, which is related to dynamic recovery and dynamic recrystallization. Finally, at Stage IV, the stress becomes steady when a new balance between softening and hardening is reached [36,42]. It is clear that with increasing the testing temperature and decreasing the strain rate, the Stages II and III are decreasing and at 400°C, they completely disappear.…”
Section: Compression Characteristics and Activation Energy Of Deformamentioning
confidence: 93%
“…During stage III, the stress drops steeply, which is related to dynamic recovery and dynamic recrystallization. Finally, at stage IV, the stress becomes steady when a new balance between softening and hardening is reached [209,214]. It is clear that with increasing the testing temperature and decreasing the strain rate, the stages II and III are decreasing and at 400°C, they completely disappear.…”
Section: Compression Characteristics and Activation Energy Of Deformationmentioning
confidence: 96%