Microstructure Formation in Pb-30wt.%Bi Peritectic Alloy

Abstract:

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A rich variety of two-phase microstructures have been shown to form in the directionally solidified Pb-30wt.%Bi alloy. The selection of microstructure is shown to be depended upon the value of G/V (temperature gradient in the liquid divided by growth rate). The microstructure evolution is also discussed based on the competitive growth of different phase at various G/V ratios in directional solidification. Experimental results indicate that the primary a phase is the leading phase and grows with a dendritic/cellular microstructure while the peritectic b phase grows with cellular/planar microstructure in interdendritic/intercellular region at low G/V value. In contrast, competitive structures but not the discrete banded structure is present at high G/V ratio which makes the primary and secondary phase to grow with planar/cellular interface.

Info:

Periodical:

Advanced Materials Research (Volumes 236-238)

Edited by:

Zhong Cao, Yinghe He, Lixian Sun and Xueqiang Cao

Pages:

1532-1536

DOI:

10.4028/www.scientific.net/AMR.236-238.1532

Citation:

X. W. Hu et al., "Microstructure Formation in Pb-30wt.%Bi Peritectic Alloy", Advanced Materials Research, Vols. 236-238, pp. 1532-1536, 2011

Online since:

May 2011

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Price:

$35.00

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