Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
The alloys Pb-2.2 wt pet Sb and Pb-5.8 wt pet Sb were directionally solidified with three different thermal gradients of 40, 86, and 140 K cm(-1) at growth rates ranging from 0.6 to 30 mu m s(-1). A Gaussian peak amplitude analysis of the cell/dendrite spacing distribution shows a distinct peak corresponding to the nearest neighbors. The peaks corresponding to the second and the third nearest neighbor spacings are also brought out by this technique. The ratios of the second to the first nearest neighbor spacings and that of the third to the first neighbor spacings are 1.85 +/-: 0.11 and 2.70 +/- 0.25, respectively. This indicates that the cells and dendrites both have a hexagonal distribution with a significant amount of superimposed noise. This is also confirmed by the frequency distribution of their number of nearest neighbors' (coordination number).
O'Dell, S. P.; Ding, G. L.; and Tewari, Surendra N., "Cell/Dendrite Distribution in Directionally Solidified Hypoeutectic Pb-Sb Alloys" (1999). Chemical & Biomedical Engineering Faculty Publications. 4.
O'Dell, S.P., Ding, G.L., & Tewari, S.N. (1999). Cell/Dendrite Distribution in Directionally Solidified Hypoeutectic Pb-Sb Alloys. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 30, 2159-2165.
Copyright 1999 ASM International. This paper was published in Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 30, Issue 8, pp. 2159-2165 and is made available as an electronic reprint with the permission of ASM International. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplications of any material in this paper for a fee or for commercial purposes, or modification of the content of this paper are prohibited.
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