DESIGN AND CHARACTERIZATION OF Al 6063-BASED ALLOY

The modification of 6063 Al-Mg-Si alloy has reduced the negative effects of impurities like Fe, refined the grain structure and hence increased significantly materials ductility and deformation properties. Metallography and SEM/TEM studies show that trace modifier (such as rare earth metals) is concentrated at the grain boundaries, and also promotes Si and Fe to be concentrated at grain boundary. The needle Fe-containing phase has been reduced or absorbed into spherical compounds containing rare earth metals. The modified microstructure is homogeneous and fined, which leads to enhancing extensively the extruding speed without the lose of required structure and properties.

Microstructure of Modified Al 6063 Alloy


SEM of Al 6063 Tensile Fracture Surfaces

(0#, unmodified and 1# and 3# modified)

RELATED PUBLICATIONS

1. P. Dang and M. Zhao, "Design and Manufacture of a New Type Al-Mg-Si Aluminum Alloys", Rare Earths, 49, No.3, 11 (1990).

2. P. Dang, M. Zhao and S. Guan, "Influence of Rare Earth Metals on the Microstructures and Properties of Al-Mg-Si Alloys", Journal of Rare Earths, 154, No.2, 8 (1990).

3. M. Zhao, P. Dang and X. Gang, "Distribution and Function of Rare Earth Metals in 6063 Aluminum Alloys", Journal of Rare Earths, 59, No.3, 7 (1989).

4. S. Guan, P. Dang and M. Zhao, "Improvement of the Corrosion Resistance of 6063 Aluminum Alloys", Journal of the Chinese Corrosion Society, 154, No.4, 9 (1989).

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