定向凝固枝晶组织中局部一次枝晶臂间距的表征
Characterizing the local primary dendrite arm spacing in directionally-solidified dendritic microstructures
摘要：
表征定向凝固微观结构中一次枝晶臂的间距是通过量化（i）加工对微观结构的影响和（ii）微观结构对性能的影响来开发工艺-结构-性能关系的重要步骤。在这项工作中，我们利用了一个新的Voronoi为基础的方法，空间点模式分析，适用于实验树枝状微观结构。该技术利用围绕枝晶核心的空间的Voronoi镶嵌来确定最近的邻居和局部一次枝晶臂间距。此外，我们将这种技术与最近的基于距离的技术进行了比较，并使用Voronoi细分对此进行了修改。此外，一个凸壳为基础的技术被用来包括边缘效应等技术，这可能是很重要的薄标本。这些方法被用来量化的局部一次枝晶臂间距的分布，它们的空间分布，以及它们与枝晶间共晶颗粒的实验定向凝固镍基高温合金显微照片的相关性。这可能是与定向凝固枝晶显微组织中的加工和性能相关联的重要步骤。
英文摘要：
Characterizing the spacing of primary dendrite arms in directionally-solidified microstructures is an important step for developing process-structure-property relationships by enabling the quantification of (i) the influence of processing on microstructure and (ii) the influence of microstructure on properties. In this work, we utilized a new Voronoi-based approach for spatial point pattern analysis that was applied to an experimental dendritic microstructure. This technique utilizes a Voronoi tessellation of space surrounding the dendrite cores to determine nearest neighbors and the local primary dendrite arm spacing. In addition, we compared this technique to a recent distance-based technique and a modification to this using Voronoi tesselations. Moreover, a convex hull-based technique was used to include edge effects for such techniques, which can be important for thin specimens. These methods were used to quantify the distribution of local primary dendrite arm spacings, their spatial distribution, and their correlation with interdendritic eutectic particles for an experimental directionally-solidified Ni-based superalloy micrograph. This can be an important step for correlating with both processing and properties in directionally-solidified dendritic microstructures.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
