Microstructural Evolution of Undercooled Ni-40wt%Pb Hypermonotectic Alloy

Abstract:

Article Preview

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 et al., "Microstructural Evolution of Undercooled Ni-40wt%Pb Hypermonotectic Alloy", Materials Science Forum, Vols. 475-479, pp. 2651-2654, 2005

Online since:

January 2005

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.