Three-dimensional morphology of an ultrafine Al-Si eutectic produced via laser rapid solidification
Three-dimensional morphology of an ultrafine Al-Si eutectic produced via laser rapid solidification
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DOI：
10.1016/j.scriptamat.2023.115471
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发表时间：
2023-04
影响因子：
6
通讯作者：
Xinyi Zhou;P. Chao;Luke Sloan;H. Lien;A. Hunter;A. Misra;A. Shahani
中科院分区：
文献类型：
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作者：
Xinyi Zhou;P. Chao;Luke Sloan;H. Lien;A. Hunter;A. Misra;A. Shahani
激光快速凝固Al-Si合金可获得具有超细纤维和相互连接的共晶组织。这种纤维结构长期以来被认为与在常规铸造时在掺杂杂质的合金中形成的那些纤维结构相似。在这里，我们表明，任何相似之处都是纯粹的表面现象。通过利用高通量表征和计算机视觉技术，我们对超细共晶的分支行为进行了三维分析，并将其与杂质改性的共晶以及随机分形（作为基准）进行了比较。分支统计的差异点不同的微观结构的起源杂质和淬火改性共晶。我们的定量方法不仅限于这里提供的数据，而且可以用于从其他体积数据集提取抽象信息，而无需定制。
Al-Si alloys processed by laser rapid solidification yield eutectic microstructures with ultrafine and interconnected fibers. Such fibrous structures have long been thought to bear resemblance to those formed in impurity-doped alloys upon conventional casting. Here, we show that any similarity is purely superficial. By harnessing high-throughput characterization and computer vision techniques, we perform a three-dimensional analysis of the branching behavior of the ultrafine eutectic and compare it against an impurity-modified eutectic as well as a random fractal (as a benchmark). Differences in the branching statistics point to different microstructural origins of the impurity- and quench-modified eutectic. Our quantitative approach is not limited to the data presented here but can be used to extract abstract information from other volumetric datasets, without customization.