Study on the Solidification of Sn-Pb Alloy under Direct Current Field by Synchrotron X-Ray Radiography

Abstract:

In this paper, synchrotron X-ray radiography was used to study the grain refining performance of direct current (DC) during the solidification of Sn-50 wt.% Pb alloy. Based on the radiographs, the variations of equiaxed grain number and dendrite growth rate with time were measured and analyzed. It is shown that DC mainly affects the microstructure formation through changing the nucleation behavior and the dendrite growth rate. When DC was applied during the whole process of solidification, the nucleation was enhanced and the dendrite growth was suppressed, which resulted in significant grain refinement.

• Periodical: Materials Science Forum (Volume 850)
• Pages: 186-190
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.850.186
• Online since: March 2016
• Authors: Fen Fen Yang, Fei Cao, Ren Geng Li, Hui Jun Kang, Wan Xia Huang, Tong Min Wang
• Keywords: Direct Current, Grain Refinement, Microstructure, Nucleation Rate, Solidification, Synchrotron X-Ray Radiography

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