Journal of Korea Foundry Society (한국주조공학회지)
- Volume 18 Issue 6
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- Pages.541-549
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- 1998
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- 1598-706X(pISSN)
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- 2288-8381(eISSN)
Microstructural Changes during Semi-solid State in Hypereutectic Al-Si Alloy
과공정 Al-Si 합금의 반고상 재가열시 미세조직 변화
- Kim, In-Joon (Department of Metallurgical Engineering, Yonsei University) ;
- Kim, Do-Hyang (Department of Metallurgical Engineering, Yonsei University)
- Published : 1998.12.20
Abstract
Microstructural characteristics of hypereutectic Al-Si alloys during reheating at semi-solid temperature have been investigated. The size and morphology of primary Si particles in wedge-type mold-cast ingot has been compared with hot-rolled sheet and Si particulate reinforced Al composite. Effects of P and Sr addition on the morphological changes of primary Si particles have been also investigated. Observation of the solidification microstructures of the wedge-type mold-cast ingot at different cooling rates showed that alloying elements such as P and Sr affect the morphology of Si particles, especially in the area solidified at a slow cooling rate. Negligible change in the size of primary crystals was observed after reheating experiment, but
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