Research on microstructural evolution and dynamic recrystallization behavior of JB800 bainitic steel by FEM

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• 作者：Qingjun Chen ; Yonglin Kang ; Hao Yu ; Chunmei Wang ; Chengxiang Li
• 关键词：high strength bainitic steel ; dynamic recrystallization ; microstructural evolution ; finite element method
• 刊名：Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material
• 出版年：2008
• 出版时间：June 2008
• 年：2008
• 卷：15
• 期：3
• 页码：250-254
• 全文大小：788 K

文摘

Single pass compression tests were conducted on Gleeble1500 thermal simulator. The effect of different deformation parameters on the grain size of dynamically recrystallized austenite was analyzed. A mathematical model of dynamic recrystallization and a material database of JB800 steel, whose tensile strength is above 800 MPa, were set up. A subprogram was compiled using Fortran language and called by Marc finite element software. A thermal coupled elastoplastic finite element model was established to simulate the compression process. The grain size of recrystallized austenite obtained by different recrystallization models was simulated. The results show that the optimized dynamic recrystallization model of JB800 bainitic steel has a higher precision and yields good agreement with metallographic observations.