Dynamic Recrystallization of Hot Deformed 3Cr2NiMnMo Steel: Modeling and Numerical Simulation

Hot compression tests of 3Cr2NiMnMo steel were performed at temperatures in the range of 850 to 1 100 ℃ and with strain rates of 10 ^-2 s^- 1 to 1 s ^-1. Both the constitutive equations and the hot deformation activation energy were derived from the correlativity of flow stress, strain rate and temp...

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Published inJournal of iron and steel research, international Vol. 20; no. 11; pp. 98 - 104
Main Authors LI, Xia, WU, Xiao-chun, ZHANG, Xiao-xun, LI, Ming-yao
Format Journal Article
LanguageEnglish
Published Singapore Elsevier Ltd 01.11.2013
Springer Singapore
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Summary:Hot compression tests of 3Cr2NiMnMo steel were performed at temperatures in the range of 850 to 1 100 ℃ and with strain rates of 10 ^-2 s^- 1 to 1 s ^-1. Both the constitutive equations and the hot deformation activation energy were derived from the correlativity of flow stress, strain rate and temperature. The mathematical models of the dynamic recrystaIiization of 3Cr2NiMnMo steel, which inelude the dynamic recrystallization kinetics model and the crystalliza- tion grain size model, are based on Avrami's law and the results of thermosimulation experiments. By integrating de- rived dynamic recrystallization models with the thermal mechanical coupled finite element method, the microstruc ture evolution in hot compressive deformation was simulated. The distribution of dynamic recrystallization grains and grain sizes were determined through a comparison of the simulation results with the experimental results. The distri- bution of strain and dynamic recrystallization grain is also discussed. The similarity between the experimental results and the simulated results indicates that the derived dynamic recrystallization models can be applied effectively to pre diet and analyze the microstructure evolution in hot deformed 3Cr2NiMnMo steel.
Bibliography:11-3678/TF
dynamic recrysta[hzation; 3Cr2NiMnMo steel; hot forming; microstructure evolution; numerical simulation
Hot compression tests of 3Cr2NiMnMo steel were performed at temperatures in the range of 850 to 1 100 ℃ and with strain rates of 10 ^-2 s^- 1 to 1 s ^-1. Both the constitutive equations and the hot deformation activation energy were derived from the correlativity of flow stress, strain rate and temperature. The mathematical models of the dynamic recrystaIiization of 3Cr2NiMnMo steel, which inelude the dynamic recrystallization kinetics model and the crystalliza- tion grain size model, are based on Avrami's law and the results of thermosimulation experiments. By integrating de- rived dynamic recrystallization models with the thermal mechanical coupled finite element method, the microstruc ture evolution in hot compressive deformation was simulated. The distribution of dynamic recrystallization grains and grain sizes were determined through a comparison of the simulation results with the experimental results. The distri- bution of strain and dynamic recrystallization grain is also discussed. The similarity between the experimental results and the simulated results indicates that the derived dynamic recrystallization models can be applied effectively to pre diet and analyze the microstructure evolution in hot deformed 3Cr2NiMnMo steel.
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ISSN:1006-706X
2210-3988
DOI:10.1016/S1006-706X(13)60203-4