The effects of electromagnetic vibration (EMV) on the refinement and migration of primary silicons in the Al-18 wt pct Si alloy were investigated systematically.It was found that EMV could effectively refine primary silicons.The equivalent diameter of primary silicon first decreases slowly with the current increasing from 1 A to 3 A,but then drops rapidly between 3 A and 10 A,next gradually decreases with increasing current intensity.When the EMV intensity was low,the primary silicons were agglomerated and expelled to the top of a sample,the segregation of silicon grains gradually decreased and the agglomerating phenomena disappeared with the increase of EMV intensity,and the star-like coarse primary silicons turned refined flake or square morphology.The refinement and migration of primary silicons depended on the Lorentz force,gravity and the effective viscous force.
参考文献
| [1] | A. Radjai;K. Miwa .An investigation of the effects caused by electromagnetic vibrations in a hypereutectic Al-Si alloy melt[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1998(5):1477-1484. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%