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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Abstract
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 |
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Publication: | Materials Science and Technology |
Publisher: | Maney Publishing |
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 |
URI: | http://eprints.iisc.ac.in/id/eprint/6188 |
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