Dynamic recrystallization and microstructural evolution in 40CrNi2MoV steel during forging
Summary: Reactor pressure vessel (RPV) studs require uniform microstructures for reliability. A strain-compensated Arrhenius constitutive model and dynamic recrystallization (DRX) model for 40CrNi2MoV steel were established via isothermal compression (900°C–1180°C, 0.001–0.5 s−1). Finite element ana...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-06-01
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| Series: | iScience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004225009940 |
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| author | Wei Zhu Xiaohe Wang Luoxing Li Peng Cheng Chenxi Shao Decheng Wang Feng Feng Peng Zhou |
| author_facet | Wei Zhu Xiaohe Wang Luoxing Li Peng Cheng Chenxi Shao Decheng Wang Feng Feng Peng Zhou |
| author_sort | Wei Zhu |
| collection | DOAJ |
| description | Summary: Reactor pressure vessel (RPV) studs require uniform microstructures for reliability. A strain-compensated Arrhenius constitutive model and dynamic recrystallization (DRX) model for 40CrNi2MoV steel were established via isothermal compression (900°C–1180°C, 0.001–0.5 s−1). Finite element analysis predicted microstructural evolution of samples, validated by processing maps, and electron backscatter diffraction. At 900°C/0.5 s−1, discontinuous DRX dominated via grain boundary bulging, forming necklace-like structures, while higher temperatures or lower strain rates enhanced continuous DRX. Combined discontinuous and continuous DRX at 1060°C/0.05 s−1 yielded 99.28% DRX volume fraction and refined grains (25.2 μm). Simulations under optimized parameters (1180°C initial temperature, 15 mm/s die speed) revealed secondary DRX uniformly refining grains of RPV stud, reducing average size from 144 μm to 17 μm. This framework enables predictive control of microstructures for RPV studs. |
| format | Article |
| id | doaj-art-17dea1b2e81c46c1ac256d86299e7c39 |
| institution | Kabale University |
| issn | 2589-0042 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj-art-17dea1b2e81c46c1ac256d86299e7c392025-08-20T03:46:45ZengElsevieriScience2589-00422025-06-0128611273310.1016/j.isci.2025.112733Dynamic recrystallization and microstructural evolution in 40CrNi2MoV steel during forgingWei Zhu0Xiaohe Wang1Luoxing Li2Peng Cheng3Chenxi Shao4Decheng Wang5Feng Feng6Peng Zhou7College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, Hunan, China; China Productivity Center for Machinery, China Academy of Machinery Science and Technology, Beijing 100044, China; Corresponding authorChina Nuclear Power Engineering Co., Ltd, Beijing 100044, ChinaCollege of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, Hunan, ChinaYanqi Lake (Beijing) Institute of Basic Manufacturing Technology Research Co., Ltd, Beijing 100044, ChinaChina Productivity Center for Machinery, China Academy of Machinery Science and Technology, Beijing 100044, ChinaChina Productivity Center for Machinery, China Academy of Machinery Science and Technology, Beijing 100044, ChinaChina Productivity Center for Machinery, China Academy of Machinery Science and Technology, Beijing 100044, ChinaChina Productivity Center for Machinery, China Academy of Machinery Science and Technology, Beijing 100044, ChinaSummary: Reactor pressure vessel (RPV) studs require uniform microstructures for reliability. A strain-compensated Arrhenius constitutive model and dynamic recrystallization (DRX) model for 40CrNi2MoV steel were established via isothermal compression (900°C–1180°C, 0.001–0.5 s−1). Finite element analysis predicted microstructural evolution of samples, validated by processing maps, and electron backscatter diffraction. At 900°C/0.5 s−1, discontinuous DRX dominated via grain boundary bulging, forming necklace-like structures, while higher temperatures or lower strain rates enhanced continuous DRX. Combined discontinuous and continuous DRX at 1060°C/0.05 s−1 yielded 99.28% DRX volume fraction and refined grains (25.2 μm). Simulations under optimized parameters (1180°C initial temperature, 15 mm/s die speed) revealed secondary DRX uniformly refining grains of RPV stud, reducing average size from 144 μm to 17 μm. This framework enables predictive control of microstructures for RPV studs.http://www.sciencedirect.com/science/article/pii/S2589004225009940EngineeringMaterials science |
| spellingShingle | Wei Zhu Xiaohe Wang Luoxing Li Peng Cheng Chenxi Shao Decheng Wang Feng Feng Peng Zhou Dynamic recrystallization and microstructural evolution in 40CrNi2MoV steel during forging iScience Engineering Materials science |
| title | Dynamic recrystallization and microstructural evolution in 40CrNi2MoV steel during forging |
| title_full | Dynamic recrystallization and microstructural evolution in 40CrNi2MoV steel during forging |
| title_fullStr | Dynamic recrystallization and microstructural evolution in 40CrNi2MoV steel during forging |
| title_full_unstemmed | Dynamic recrystallization and microstructural evolution in 40CrNi2MoV steel during forging |
| title_short | Dynamic recrystallization and microstructural evolution in 40CrNi2MoV steel during forging |
| title_sort | dynamic recrystallization and microstructural evolution in 40crni2mov steel during forging |
| topic | Engineering Materials science |
| url | http://www.sciencedirect.com/science/article/pii/S2589004225009940 |
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