Research on the dynamic recrystallization behavior of GCr15 steel |
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| Authors: | Chong-xiang Yue Li-wen Zhang Shu-lun Liao Ji-bin Pei Hui-ju Gao Yuan-wei Jia Xiao-jie Lian |
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| Affiliation: | 1. State Key Laboratory for Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116023, China;2. Dongbei Special Steel Group, Dalian 116031, China;3. Ltd. Technology Center, Taiyuan Iron & Steel (Group) Co., Taiyuan 030003, China;1. School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China;2. School of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, China;3. Montana Tech, Butte, MT, USA;4. Center for Collective Use Material Science, Siberian State Industrial University, Novokuznetsk, Russian Federation;1. Institute of Forming Technology and Equipment, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, PR China;2. School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 PR China;1. School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;2. State Key Laboratory of High Performance Complex Manufacturing, Changsha 410083, China;3. Light Alloy Research Institute of Central South University, Changsha 410083, China;4. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, China;1. Institute of Metal Research, Chinese Academy of Sciences, Wenhua Road 72, Shenyang 110016, China;2. Max-Planck Institut für Eisenforschung, Max-Planck-Straβe 1, Düsseldorf 40237, Germany;1. Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland;2. Institut for Frontier Materials, Deakin University, Geelong, VIC 3220, Australia |
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| Abstract: | The dynamical recrystallization (DRX) of GCr15 steel was investigated at deformation temperatures of 950–1150 °C and strain rates of 0.1–10 s?1 on a Gleeble-3800 thermo-mechanical simulator. The stress–strain curves at lower strain rates are typical of the occurrence of DRX and exhibit a peak in the flow stress before reaching steady state. The flow stress at higher strain rates increases rapidly to the maximum too, but followed by a steady region. The microstructures after deformation certify that DRX takes place in all specimens. And the results show that DRX occurs more easily with the decrease of strain rate and the increase of deformation temperature. Using regression analysis, the DRX activation energy of the steel, the relationship of critical strain and deformation conditions were determined. In order to determine the recrystallized fraction under different conditions, an approximate model based on the stress–strain curves was investigated, and the kinetic model for DRX was established. |
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