| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1599159 | Acta Metallurgica Sinica (English Letters) | 2009 | 7 Pages |
Abstract
A new method for producing semisolid slurry, annular electromagnetic stirring (A-EMS), to refine and spheroidize grains was exploited. Experimental work was undertaken to investigate the effects of cooling rate, stirring power and stirring time on the solidification behavior of A357 alloy using A-EMS. It was found that increasing the cooling rate and stirring power gave rise to substantial grain refinement, which could be attributed to the increase of effective nucleation rate caused by the extremely uniform temperature and composition fields in the bulk liquid during the initial stage of solidification. Results showed that a fully grain refined spherical structure could be obtained using proper processing conditions within 10 s.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Guanglei ZHU, Jun XU, Zhifeng ZHANG, Yuelong BAI, Likai SHI,