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论文类型：会议论文

发表时间：2013-01-01

收录刊物：CPCI-S、Scopus

卷号：1532

页面范围：304-310

关键字：Crystal Plasticity; Integration Model; 22MnB5 Boron Steel; Isothermal Deformation

摘要：An improved integration model based on crystal plasticity is presented to describe the thermo-mechanical coupled response of 22MnB5 boron steel deformation at elevated temperatures. Considering the thermal kinematics, the plastic deformation gradient is chosen as the basic integration variable. The corresponding governing equation is solved by implicit method to ensure numerical stability. The convergent plastic deformation contains information of plastic deformation and can also reflect the thermal effects. Comparison with traditional algorithm, the presented model can be used in the coupled thermo-mechanical analysis. Using this numerical model, we computed the tension response of the material at temperatures 600-900 degrees C and at strain rates from 0.01s(-1) to 0.1 s(-1). The predicted results agree well with the experimental data.