Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 530, Issue -, Pages 367-372Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2011.09.097
Keywords
V150 grade oil casing steel; Hot compression deformation; Flow stress; Constitutive equation
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The true stress-strain data from isothermal hot compression tests, in a wide range of temperatures (1173-1473 K) and strain rates (0.01-10s(-1)), were employed to study the deformation behavior and develop constitutive equation of V150 grade oil casing steel based on an Arrhenius-type equation. The flow stress increases with the decrease of deformation temperature and the increase of strain rate, which can be represented by Zener-Hollomon parameter in an exponential equation. The influence of strain was incorporated in the developed constitutive equation by considering the effect of strain on material constants. The flow stress predicted by the constitutive equation shows good agreement with the experimental value through the whole experimental temperature and strain rate range except a slight deviation for predicting the stress deformed at 1173 K under 0.01s(-1), and the average relative error is 4.21%. (C) 2011 Elsevier B.V. All rights reserved.
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