Arrhenius constitutive model and dynamic recrystallization behavior of 18CrNiMo7-6 steel
In order to analyze the thermal deformation and dynamic recrystallization behavior of 18CrNiMo7-6 steel, the isothermal compression tests are carried out on Gleeble-3500 thermal simulator machine at deformation temperatures 973.15 K–1273.15 K with strain rates 0.001 s−1–1 s−1. Based on the true stre...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423008876 |
| _version_ | 1797798766891237376 |
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| author | Runze Cao Wei Wang Shibo Ma Huajun Yan Zhenkai Mu Shuangjie Zhang |
| author_facet | Runze Cao Wei Wang Shibo Ma Huajun Yan Zhenkai Mu Shuangjie Zhang |
| author_sort | Runze Cao |
| collection | DOAJ |
| description | In order to analyze the thermal deformation and dynamic recrystallization behavior of 18CrNiMo7-6 steel, the isothermal compression tests are carried out on Gleeble-3500 thermal simulator machine at deformation temperatures 973.15 K–1273.15 K with strain rates 0.001 s−1–1 s−1. Based on the true stress σ0.3, the Arrhenius constitutive models are constructed by using characterization parameters and physical base parameters, and the determination coefficients between the predicted values of the two models and the measured values are 0.98378 and 0.97613, respectively. The constitutive models of characterization parameters and physical base parameters considering strain effect are also constructed, and a comparative analysis is made. The results show that the predicted values of the characterization parameters constitutive model is closer to the measured values in the low strain region. After reaching the peak strain, the predicted values of the two constitutive models are close to the measured values, and both have high prediction accuracy. The dynamic recrystallization models are established to characterize the recrystallization behavior. The recrystallization activation energy of 18CrNiMo7-6 steel is 169.6793 kJ mol−1, the ratio of critical strain to peak strain is about 0.47074, and the ratio of critical stress to peak stress is about 0.94059. The activation energy of 50% dynamic recrystallization is 29.9844 kJ mol−1. The dynamic recrystallized grain size increases with increasing deformation temperature or decreasing strain rate, and the activation energy of grain growth is −49.9237 kJ mol−1. |
| first_indexed | 2024-03-13T04:09:48Z |
| format | Article |
| id | doaj.art-d6c354ebe7a14d9e9017bf5a360d506a |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-13T04:09:48Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-d6c354ebe7a14d9e9017bf5a360d506a2023-06-21T06:57:06ZengElsevierJournal of Materials Research and Technology2238-78542023-05-012463346347Arrhenius constitutive model and dynamic recrystallization behavior of 18CrNiMo7-6 steelRunze Cao0Wei Wang1Shibo Ma2Huajun Yan3Zhenkai Mu4Shuangjie Zhang5School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei Province, ChinaSchool of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei Province, China; Hebei Key Laboratory of Material Near-Net Forming Technology, Hebei University of Science and Technology, Shijiazhuang, 050018, China; Corresponding author.Hebei Key Laboratory of Material Near-Net Forming Technology, Hebei University of Science and Technology, Shijiazhuang, 050018, ChinaSchool of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei Province, China; Hebei Key Laboratory of Material Near-Net Forming Technology, Hebei University of Science and Technology, Shijiazhuang, 050018, ChinaSchool of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei Province, China; Hebei Key Laboratory of Material Near-Net Forming Technology, Hebei University of Science and Technology, Shijiazhuang, 050018, ChinaSchool of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei Province, China; Hebei Key Laboratory of Material Near-Net Forming Technology, Hebei University of Science and Technology, Shijiazhuang, 050018, ChinaIn order to analyze the thermal deformation and dynamic recrystallization behavior of 18CrNiMo7-6 steel, the isothermal compression tests are carried out on Gleeble-3500 thermal simulator machine at deformation temperatures 973.15 K–1273.15 K with strain rates 0.001 s−1–1 s−1. Based on the true stress σ0.3, the Arrhenius constitutive models are constructed by using characterization parameters and physical base parameters, and the determination coefficients between the predicted values of the two models and the measured values are 0.98378 and 0.97613, respectively. The constitutive models of characterization parameters and physical base parameters considering strain effect are also constructed, and a comparative analysis is made. The results show that the predicted values of the characterization parameters constitutive model is closer to the measured values in the low strain region. After reaching the peak strain, the predicted values of the two constitutive models are close to the measured values, and both have high prediction accuracy. The dynamic recrystallization models are established to characterize the recrystallization behavior. The recrystallization activation energy of 18CrNiMo7-6 steel is 169.6793 kJ mol−1, the ratio of critical strain to peak strain is about 0.47074, and the ratio of critical stress to peak stress is about 0.94059. The activation energy of 50% dynamic recrystallization is 29.9844 kJ mol−1. The dynamic recrystallized grain size increases with increasing deformation temperature or decreasing strain rate, and the activation energy of grain growth is −49.9237 kJ mol−1.http://www.sciencedirect.com/science/article/pii/S223878542300887618CrNiMo7-6Constitutive modelDynamic recrystallization modelCritical strain |
| spellingShingle | Runze Cao Wei Wang Shibo Ma Huajun Yan Zhenkai Mu Shuangjie Zhang Arrhenius constitutive model and dynamic recrystallization behavior of 18CrNiMo7-6 steel Journal of Materials Research and Technology 18CrNiMo7-6 Constitutive model Dynamic recrystallization model Critical strain |
| title | Arrhenius constitutive model and dynamic recrystallization behavior of 18CrNiMo7-6 steel |
| title_full | Arrhenius constitutive model and dynamic recrystallization behavior of 18CrNiMo7-6 steel |
| title_fullStr | Arrhenius constitutive model and dynamic recrystallization behavior of 18CrNiMo7-6 steel |
| title_full_unstemmed | Arrhenius constitutive model and dynamic recrystallization behavior of 18CrNiMo7-6 steel |
| title_short | Arrhenius constitutive model and dynamic recrystallization behavior of 18CrNiMo7-6 steel |
| title_sort | arrhenius constitutive model and dynamic recrystallization behavior of 18crnimo7 6 steel |
| topic | 18CrNiMo7-6 Constitutive model Dynamic recrystallization model Critical strain |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423008876 |
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