Deformation Behavior and Constitutive Equation of 42CrMo Steel at High Temperature
High-temperature reduction pretreatment (HTRP) is a process that can significantly improve the core quality of a billet. The existing flow stress data cannot meet the needs of simulation due to lack of high temperature data. To obtain the hot forming process parameters for the high-temperature reduc...
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| Format: | Article |
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MDPI AG
2021-10-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/10/1614 |
| _version_ | 1797513865479585792 |
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| author | Hongqiang Liu Zhicheng Cheng Wei Yu Gaotian Wang Jie Zhou Qingwu Cai |
| author_facet | Hongqiang Liu Zhicheng Cheng Wei Yu Gaotian Wang Jie Zhou Qingwu Cai |
| author_sort | Hongqiang Liu |
| collection | DOAJ |
| description | High-temperature reduction pretreatment (HTRP) is a process that can significantly improve the core quality of a billet. The existing flow stress data cannot meet the needs of simulation due to lack of high temperature data. To obtain the hot forming process parameters for the high-temperature reduction pretreatment process of 42CrMo steel, a hot compression experiment of 42CrMo steel was conducted on Gleeble-3500 thermal-mechanical at 1200–1350 °C with the rates of deformation 0.001–10 s<sup>−1</sup> and the deformation of 60%, and its deformation behavior at elevated temperature was studied. In this study, the effects of flow stress temperature and strain rate on austenite grain were investigated. Moreover, two typical constitutive models were employed to describe the flow stress, namely the Arrhenius constitutive model of strain compensation and back propagation artificial neural network (BP ANN) model. The performance evaluation shows that BP ANN model has high accuracy and stability to predict the curve. The thermal processing maps under strains of 0.1, 0.2, 0.3, and 0.4 were established. Based on the analysis of the thermal processing map, the optimal high reduction process parameter range of 42CrMo is obtained: the temperature range is 1250–1350 °C, and the strain rate range is 0.01–1 s<sup>−1</sup>. |
| first_indexed | 2024-03-10T06:23:35Z |
| format | Article |
| id | doaj.art-f8f5f30521ca46d7b6d43774f3a15768 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T06:23:35Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-f8f5f30521ca46d7b6d43774f3a157682023-11-22T19:09:32ZengMDPI AGMetals2075-47012021-10-011110161410.3390/met11101614Deformation Behavior and Constitutive Equation of 42CrMo Steel at High TemperatureHongqiang Liu0Zhicheng Cheng1Wei Yu2Gaotian Wang3Jie Zhou4Qingwu Cai5Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaInstitute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, ChinaInstitute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, ChinaJiangSu Runbang Clad Metal Material Co. Ltd., Nanjing 211803, ChinaJiangSu Runbang Clad Metal Material Co. Ltd., Nanjing 211803, ChinaCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaHigh-temperature reduction pretreatment (HTRP) is a process that can significantly improve the core quality of a billet. The existing flow stress data cannot meet the needs of simulation due to lack of high temperature data. To obtain the hot forming process parameters for the high-temperature reduction pretreatment process of 42CrMo steel, a hot compression experiment of 42CrMo steel was conducted on Gleeble-3500 thermal-mechanical at 1200–1350 °C with the rates of deformation 0.001–10 s<sup>−1</sup> and the deformation of 60%, and its deformation behavior at elevated temperature was studied. In this study, the effects of flow stress temperature and strain rate on austenite grain were investigated. Moreover, two typical constitutive models were employed to describe the flow stress, namely the Arrhenius constitutive model of strain compensation and back propagation artificial neural network (BP ANN) model. The performance evaluation shows that BP ANN model has high accuracy and stability to predict the curve. The thermal processing maps under strains of 0.1, 0.2, 0.3, and 0.4 were established. Based on the analysis of the thermal processing map, the optimal high reduction process parameter range of 42CrMo is obtained: the temperature range is 1250–1350 °C, and the strain rate range is 0.01–1 s<sup>−1</sup>.https://www.mdpi.com/2075-4701/11/10/161442CrMo billetreduction pretreatmentflow stressconstitutive equation |
| spellingShingle | Hongqiang Liu Zhicheng Cheng Wei Yu Gaotian Wang Jie Zhou Qingwu Cai Deformation Behavior and Constitutive Equation of 42CrMo Steel at High Temperature Metals 42CrMo billet reduction pretreatment flow stress constitutive equation |
| title | Deformation Behavior and Constitutive Equation of 42CrMo Steel at High Temperature |
| title_full | Deformation Behavior and Constitutive Equation of 42CrMo Steel at High Temperature |
| title_fullStr | Deformation Behavior and Constitutive Equation of 42CrMo Steel at High Temperature |
| title_full_unstemmed | Deformation Behavior and Constitutive Equation of 42CrMo Steel at High Temperature |
| title_short | Deformation Behavior and Constitutive Equation of 42CrMo Steel at High Temperature |
| title_sort | deformation behavior and constitutive equation of 42crmo steel at high temperature |
| topic | 42CrMo billet reduction pretreatment flow stress constitutive equation |
| url | https://www.mdpi.com/2075-4701/11/10/1614 |
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