Phaniraj, MP and Lahiri, AK (2004) Constitutive model for vanadium microalloyed steel under hot working conditions. In: Materials Science and Technology, 20 (9). pp. 1151-1157.
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Hot compression tests were carried out in the temperature range $850-1150^oC$ at $0.1-60 s^-1$ strain rates. The hyperbolic sine equation and neural networks were used to model the constitutive behaviour. Evaluating constitutive parameters n, Q and A using the usual log – log plots does not yield constant values. The n, Q and A values were determined simultaneously using a non-linear optimisation procedure and were fitted as functions of strain. These relations, in conjunction with the hyperbolic sine equation, describe the constitutive behaviour of the steel. A 3 : 4 : 1 neural network is trained using 75% of the stress – strain data. The network predicts flow stresses and peak strains with good accuracy. Vanadium increases the peak strain, peak stress, and mean flow stress of austenite significantly.
|Item Type:||Journal Article|
|Additional Information:||The copyright of this article belongs to Maney Publishing.|
|Keywords:||Steels;Mechanical properties;Modelling;Neural networks;Vanadium microaddition References|
|Department/Centre:||Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)|
|Date Deposited:||09 Apr 2006|
|Last Modified:||19 Sep 2010 04:25|
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