The combined effect of rapid solidification and phosphor addition on the microstructure of hypereutectic A390 alloys. | ||
| Journal Of Wassit For Science & Medicine | ||
| Article 1, Volume 5, Issue 1, December 2012, Pages 190-199 | ||
| Author | ||
| Lamyaa Mahde Asaad | ||
| Abstract | ||
| The influence of the combined effect of rapid solidification and phosphor addition on the morphology of primary silicon particles in A390 Al-Si alloy has been investigated by using light optical microscope (LOM). The P as modifier element was added in the shape of copper phosphor (Cu3P) master alloy. The results show that as the solidification rate increases, the size of primary silicon particles in A390 alloy reduces and the morphology of these particles evolve from plate-like to the fine nodular shape. The rapid solidification has a significant improvement on the refining performance of P to modify and refine the primary Si particles in A390 alloy. It is suggested that the refining performance of P in Cu3P master alloy is related to the formation the AlP particles which act as a heterogeneous nucleation. This affects the solidification rate and restricts the Si phase's growth. | ||
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