Cooling Rate Effect Study on the Microstructure and Hardness of Hypereutectic Aluminum Al-18%Si Elaborated by V-process
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2014 by IJETT Journal|
|Year of Publication : 2014|
|Authors : C.El akili , M. alami , A.bouayad
C.El akili , M. alami , A.bouayad, Article:Cooling Rate Effect Study on the Microstructure and Hardness of Hypereutectic Aluminum Al-18%Si Elaborated by V-process, International Journal of Engineering Trends and Technology(IJETT), 7(2),65-70, published by seventh sense research group
The solidification process significantly affects the microstructure and mechanical properties of molding workpiece, and there are numerous factors that affect this process. Much progress has been made in the research on the solidification effect on microstructure and mechanical properties. This study deals with the solidification in V-process, the main studied parameter is the massively cooling rate effect on the microstructure and hardness. The experimental study shows that when the surface is small, the solidification rate is higher and the microstructure is more refined than when the surface is large. However, the cooling rate is very important in the case of small section; it reaches a maximum value that equals to 5°C / s; with this rate, the average hardness value rises to 51.97 (HRA).
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hypereutectic Al-Si, primary silicon, cooling rate, hardness, V-process, microstructure.