Establishment of a two-stage constitutive model based on dislocation density theory for as-forged SA508 Gr.3Cl.1
Source abstract
Abstract
Abstract The high-temperature deformation behavior of the SA508 Gr.3Cl.1 steel was investigated by the uniaxial isothermal compression tests at the deformation temperature from 1223 K to 1473 K and strain rate from 0.001s−1 to 1 s−1, which were carried out using Gleeble-1500 thermo-mechanical simulator. Based on the experimental data, the material parameters and active energy of hot deformation were determined according to the regression analysis method. The critical strain of dynamic recrystallization (DRX) was confirmed by simplified P-J method. Furthermore, the constitutive model for work hardening-dynamic recovery (WH-DRV) stage and DRX stage was established based on dislocation density theory and the kinetics of DRX. Finally, the flow stress calculated using the established model and experiment data was compared and the results showed that it is enough accurate to predict the flow stress during hot deformation for SA508 Gr.3Cl.1. Thus, the model will be beneficial for the accuracy of simulation by Finite Element Method (FEM) method.
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Research context
OpenAlex topics: Metallurgy and Material Forming · Microstructure and mechanical properties · High Temperature Alloys and Creep
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References (27)
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1. Structural materials challenges for advanced reactor systems10.1016/j.jnucmat.2008.11.026 ↗
2. An investigation of phase transition on the microstructural characteristic and creep behavior for the SA508 Gr.3 steel used for nuclear reactor pressure vessels10.1016/j.msea.2017.11.073 ↗
3. Effects of strain rate and temperature on tensile behavior of hydrogen-charged SA508 Cl.3 pressure vessel steel10.1016/S0921-5093(02)00737-2 ↗
4. A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures
5. Dislocation-mechanics-based constitutive relations for material dynamics calculation10.1063/1.338024 ↗
6. A constitutive description of the deformation of copper based on the use of mechanical threshold stress as all internal state variable10.1016/0001-6160(88)90030-2 ↗
7. A simple constitutive model for predicting flow stress of medium carbon microalloyed steel during hot deformation10.1016/j.matdes.2015.04.005 ↗
8. A physically based constitutive model of as-forged 34CrNiMo6 steel and processing maps for hot working10.1016/j.vacuum.2018.06.022 ↗
9. Flow behavior and constitutive description of 20CrMnTi steel at high temperature10.1007/s11771-018-3801-0 ↗
10. A physically-based constitutive model for a nitrogen alloyed ultralow carbon stainless steel10.1016/j.commatsci.2014.10.044 ↗
11. Study on hot deformation behavior and processing maps of low carbon bainitic steel10.1016/j.matdes.2014.10.068 ↗
12. Constitutive modeling for elevated temperature flow behavior of 42CrMo steel10.1016/j.commatsci.2007.08.011 ↗
13. Numerical simulation of microstructure evolution for SA508-3 steel during inhomogeneous hot deformation process10.1016/S1006-706X(14)60178-3 ↗
14. Hot deformation characteristics of as–cast high-Cr ultra-super-critical rotor steel with columnar grains10.1007/s12613-016-1349-2 ↗
15. Hot deformation behavior and processing map of a typical Ni- based superalloy10.1016/j.msea.2013.09.049 ↗
16. Study of dynamic recrystallization in a Ni-based superalloy by experiments and cellular automaton model10.1016/j.msea.2014.12.092 ↗
17. On the mechanism of hot deformation10.1016/0001-6160(66)90207-0 ↗
18. Study on constitutive modeling and processing maps for hot deformation of medium carbon Cr–Ni–Mo alloyed steel10.1016/j.matdes.2015.11.036 ↗
19. Constitutive model for elevated temperature flow stress of AZ41M magnesium alloy considering the compensation of strain10.1016/j.jallcom.2015.06.257 ↗
20. Characterization of dynamic recrystallization parameters for a low carbon resulfurized free-cutting steel10.1016/j.matdes.2013.07.031 ↗
21. Dynamic softening mechanisms in 304 austenitic stainless steel10.1179/cmq.1990.29.2.147 ↗
22. Kinetics of flow and strain-hardening10.1016/0001-6160(81)90112-7 ↗
23. A one-parameter approach to determining the critical conditions for the initiation of dynamic recrystallization10.1016/1359-6454(95)00146-7 ↗
24. Predicting the critical stress for initiation of dynamic recrystallization10.2355/isijinternational.46.1679 ↗
25. Physically-based constitutive modelling of hot deformation behavior in a LDX 2101 duplex stainless steel10.1016/j.matdes.2016.05.118 ↗
26. A unified phenomenological description of work hardening and creep based on one-parameter models10.1016/0001-6160(84)90202-5 ↗
27. Extrapolative prediction of the hot strength of austenitic steels with a combined constitutive and ANN model10.1016/S0924-0136(00)00461-1 ↗