Recrystallization behavior of a high-manganese steel: Experiments and simulations
Recrystallization behavior of a high-manganese steel: Experiments and simulations
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DOI：
10.1016/j.actamat.2015.08.057
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发表时间：
2015-11
期刊：
影响因子：
9.4
通讯作者：
C. Haase;Markus Kühbach;L. Barrales-Mora;S. Wong;F. Roters;D. Molodov;G. Gottstein
中科院分区：
文献类型：
--
作者：
C. Haase;Markus Kühbach;L. Barrales-Mora;S. Wong;F. Roters;D. Molodov;G. Gottstein
研究了 30% 冷轧 Fe-28Mn-0.28C 孪生诱导塑性 (TWIP) 钢的热处理。低程度的滚动可以排除剪切带的影响，但可以捕捉特征纹理的演变。通过 SEM/EBSD、X 射线织构分析和硬度测量进行了详细的微观结构和织构表征。具体来说，使用晶体塑性有限元法 (CP-FEM) 框架计算位错密度分布，并通过元胞自动机 (CA) 方法对初次再结晶进行建模。再结晶状态的宏观织构由以下因素控制：（i）在成核过程中由于定向成核而保留变形织构成分，以及（ii）通过再结晶孪晶形成新的取向。新晶粒的成核在晶界处不均匀地发生。实验结果用作模拟的输入数据。 CP-FEM 模拟的结果以取向分辨位错密度的形式以及从 SEM/EBSD 测量中提取的再结晶核的取向和密度直接转移到 3D CA 中以模拟初次再结晶。结果证实，考虑微观结构不均匀性和退火孪晶形成方面的实际模拟场景对于准确预测所研究的高锰钢的再结晶行为至关重要。
The thermal treatment of a 30% cold-rolled Fe–28Mn–0.28C Twinning-Induced Plasticity (TWIP) steel was investigated. The low degree of rolling served to exclude the effect of shear banding but to capture the characteristic texture evolution. A detailed microstructure and texture characterization was performed by means of SEM/EBSD, X-ray texture analysis, and hardness measurements. Specifically, the dislocation density distribution was computed using a Crystal Plasticity Finite Element Method (CP-FEM) framework and the primary recrystallization was modeled by means of a Cellular Automaton (CA) approach. The macrotexture of the recrystallized state was controlled by (i) retainment of the deformation texture components during nucleation due to oriented nucleation and (ii) the formation of new orientations by recrystallization twinning. The nucleation of new grains occurred heterogeneously at grain boundaries. The experimental results were used as input data for simulations. The results from the CP-FEM simulations in the form of orientation-resolved dislocation densities and the orientation and density of recrystallization nuclei extracted from SEM/EBSD measurements were directly transferred into a 3D CA for the simulation of primary recrystallization. The results substantiated that the consideration of realistic simulation scenarios in terms of microstructural inhomogeneity and annealing twin formation is essential for an accurate prediction of the recrystallization behavior of the investigated high-manganese steel.