Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 528, Issue 15, Pages 5081-5087Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2011.03.050
Keywords
1Cr12Ni3Mo2VNbN martensitic steel; Deformation behavior; Flow stress; Constitutive equation
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Funding
- Dongfang Turbine Co., Ltd., Deyang, China
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The deformation behavior of 1Cr12Ni3Mo2VNbN martensitic steel in the temperature range of 1253 and 1453K and the strain rate range of 0.01 and 10s(-1) are investigated by isothermal compression tests on a Gleeble 1500 thermal-mechanics simulator. Most of the stress-strain curves exhibit a single peak stress, after which the stress gradually decreases until a steady state stress occurs, indicating a typical dynamic recrystallization (DRX) behavior of the steel under the deformation conditions. The experimental data are employed to develop constitutive equations on the basis of the Arrhenius-type equation. In the constitutive equations, the effect of the strain on the deformation behavior is incorporated and the effects of the deformation temperature and strain rate are represented by the Zener-Holloman parameter. The flow stress predicted by the constitutive equations shows good agreement with the experimental stress, which validates the efficiency of the constitutive equations in describing the deformation behavior of the material. (C) 2011 Elsevier B.V. All rights reserved.
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