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Published in:
2015 | OriginalPaper | Chapter
1. Voronoi Diagram and Microstructure of Weldment
Authors : Jungho Cho, Min Choi
Published in: Ubiquitous Computing Application and Wireless Sensor
Publisher: Springer Netherlands
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Abstract
One of the famous space decomposition algorithm known as Voronoi diagram is applied to express metal’s microstructure for the first time by fortuitous discovery of superficial analogy of Voronoi cell and metal’s crystal grain. Areas of Voronoi cells are controlled by locations and the number of seed points. And it can be correlated to grain size of microstructure and nuclei numbers. Therefore grain coarsening and refinement of microstructure can be described by Voronoi tessellation for simple case. In addition to this, columnar crystal caused by rapid cooling rate in one direction is also described by anisotropic locations of seed points which can be observed in typical weldment in easy. Although it needs more profound research about correlation between crystal grain growth and Voronoi diagram control variables, it shows fairly reasonable feasibility of adopting Voronoi tesselation as metal’s microstructure description and prediction tool.