Paper Title:
Microstructural Evolution of Undercooled Ni-40wt%Pb Hypermonotectic Alloy
  Abstract

Microstructural evolution of bulk undercooled Ni-40wt%Pb hypermonotectic alloy was systematically investigated by using molten glass purification and superheating cycling. Within the achieved undercooling range, the microstructures were classified into three categories. When the undercooling was less than 50K, the microstructure consisted of coarse dendritic grain and interdendritic Pb lumps. Increasing undercooling to the range 100 to 198K, macrosegregation was serious. When the undercooling was up to 292K, refined granular grain with homogeneously distributed fine Pb particles on it formed. The granulation mechanism of granular grains was owing to dendritic disintegration and subsequent recrystallization.

  Info
Periodical
Materials Science Forum (Volumes 475-479)
Main Theme
Edited by
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Pages
2651-2654
DOI
10.4028/www.scientific.net/MSF.475-479.2651
Citation
H. Zheng, Y. Yu, J. G. Li, "Microstructural Evolution of Undercooled Ni-40wt%Pb Hypermonotectic Alloy", Materials Science Forum, Vols. 475-479, pp. 2651-2654, 2005
Online since
January 2005
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$32.00
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