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Article: Primary dendrite distribution and disorder during directional solidification of Pb-Sb alloys
- Article from:
- Metallurgical and Materials Transactions
- Article date:
- November 1, 2002
- Author:
CopyrightCopyright Minerals, Metals & Materials Society Nov 2002. Provided by ProQuest LLC. (Hide copyright information)
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Pb-2.2 wt pet Sb and Pb-5.8 wt pct Sb alloys have been directionally solidified from a single-crystal seed with its [100] orientation parallel to the growth direction, to examine the primary dendrite distribution and disorder of the dendrite arrays. The dendrite distribution and ordering have been investigated using analysis techniques such as the Gauss-amplitude fit to the frequency distribution of nearest and higher-order spacings, minimum spanning tree (MST), Voronoi polygon, and Fourier transform (FT) of the dendrite centers. Since the arrangement of dendrites is driven by the requirement to accommodate side-branch growth along the (100) directions, the FT images of the fully developed ...