Consistent Quantification of Precipitate Shapes and Sizes in Two and Three Dimensions Using Central Moments
Consistent Quantification of Precipitate Shapes and Sizes in Two and Three Dimensions Using Central Moments
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DOI：
10.1007/s40192-022-00259-2
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发表时间：
2022-04
影响因子：
3.3
通讯作者：
F. Schleifer;M. Müller;Yueh-Yu Lin;M. Holzinger;U. Glatzel;M. Fleck
中科院分区：
文献类型：
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作者：
F. Schleifer;M. Müller;Yueh-Yu Lin;M. Holzinger;U. Glatzel;M. Fleck
计算微结构设计旨在充分利用合金系统的沉淀强化潜力。发展精确的模型来描述沉淀物形状和尺寸的时间演变具有重要的技术意义。沉淀物微观结构的实验研究主要是基于二维显微图像。这些微观结构的时间演变的定量建模需要在三维模拟装置中进行讨论。为了一致地弥合2D图像和3D模拟数据之间的差距，我们采用了中心矩的方法。基于此，片状颗粒的纵横比在二维和三维中被一致地定义。该方法的准确性和互操作性通过代表性的2D和3D像素为基础的样本数据，包含粒子与预定义的纵横比证明。以镍基高温合金730 °C γ″组织粗化为例，验证了该方法在集成计算材料工程（ICME）中的适用性。首次将二维实验图像和三维相场模拟数据中的γ″相形状信息进行了直接对比。这种粗化数据表明偏离经典的成熟行为，并揭示了增加沉淀物凝结的时期。
Computational microstructure design aims to fully exploit the precipitate strengthening potential of an alloy system. The development of accurate models to describe the temporal evolution of precipitate shapes and sizes is of great technological relevance. The experimental investigation of the precipitate microstructure is mostly based on two-dimensional micrographic images. Quantitative modeling of the temporal evolution of these microstructures needs to be discussed in three-dimensional simulation setups. To consistently bridge the gap between 2D images and 3D simulation data, we employ the method of central moments. Based on this, the aspect ratio of plate-like particles is consistently defined in two and three dimensions. The accuracy and interoperability of the method is demonstrated through representative 2D and 3D pixel-based sample data containing particles with a predefined aspect ratio. The applicability of the presented approach in integrated computational materials engineering (ICME) is demonstrated by the example of γ″ microstructure coarsening in Ni-based superalloys at 730 °C. For the first time, γ″ precipitate shape information from experimental 2D images and 3D phase-field simulation data is directly compared. This coarsening data indicates deviations from the classical ripening behavior and reveals periods of increased precipitate coagulation.