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首页> 外文会议>International Conference on Aluminum Alloys >Comparison of Localized Deformation in Crystal Plasticity Based Finite Element Simulations between Experimentally Measured and Statistically Generated Three-Dimensional Microstructures for the Aluminum Alloy 5754
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Comparison of Localized Deformation in Crystal Plasticity Based Finite Element Simulations between Experimentally Measured and Statistically Generated Three-Dimensional Microstructures for the Aluminum Alloy 5754

机译：基于铝合金三维微结构在实验测量和统计三维微结构之间晶体塑性的局部变形的比较5754

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摘要

This paper presents three dimensional (3D) grain structure of AA5754-O aluminum sheet collected by serial sectioning using a Dual Beam Focused Ion Beam equipped with Electron Backscatter Diffraction (EBSD) to enable an evaluation of the necessity for obtaining real 3D microstructures instead of generating 3D microstructures from 2D data using statistically equivalent microstructure generation techniques. A volume of 45.5×51×33μm material is sampled to construct the 3D microstructure and the corresponding equivalent 3D microstructure is generated using M-builder. These data sets are processed to build FE meshes containing real grain morphology and orientation. FE simulations of deformation fields using rate dependant crystal plasticity theory are conducted on both the real and generated microstructures and the predicted Forming Limit Diagrams (FLD's) for the two microstructures are compared with the experimental FLD from the same alloy AA5754. Significant differences are observed between the two microstructures.
机译：本文介绍了通过使用配备有电子反向散射（EBSD）的双光束聚焦离子束通过串联切片收集的AA5754-O铝板的三维（3D）晶粒结构，以评估获得真正的3D微结构而不是产生的必要性使用统计上等效的微结构产生技术的2D微结构。采样体积为45.5×51×33μm材料以构建3D微结构，使用M-Builder产生相应的等效3D微结构。处理这些数据集以构建包含真实晶粒形态和方向的FE网格。使用速率相关晶体塑性理论的变形场的FE模拟在实际和产生的微结构和预测的形成极限图（FLD）与来自相同合金AA5754的实验FLD进行比较。在两个微观结构之间观察到显着差异。

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