Microstructural Evolution of Undercooled Ni-40wt%Pb Hypermonotectic Alloy
2005 ◽
Vol 475-479
◽
pp. 2651-2654
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Keyword(s):
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.
1981 ◽
Vol 39
◽
pp. 74-75
Keyword(s):
2019 ◽
Vol 110
(7)
◽
pp. 664-671
2019 ◽
Vol 23
(4)
◽
pp. 101-106
MICROSTRUCTURAL EVOLUTION OF DIRECTIONALLY SOLIDIFIED Ni--BASED SUPERALLOY DZ125 UNDER PLANAR GROWTH
2010 ◽
Vol 46
(9)
◽
pp. 1075-1080
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2010 ◽
Vol 46
(8)
◽
pp. 897-906
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