Effect of SiC Particle Size on Microstructure and Tensile Behavior of Aluminum Matrix Composites

Chun Lin He; Jian Ming Wang; Qing Kui Cai

doi:10.4028/www.scientific.net/AMR.183-185.2129

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 183-185Effect of SiC Particle Size on Microstructure and...

Effect of SiC Particle Size on Microstructure and Tensile Behavior of Aluminum Matrix Composites

Abstract:

The aluminum metal matrix composites (Al MMCs) reinforced by SiC particles with different sizes (25 nm, 150 nm and 3.5 m) were fabricated by powder metallurgy technique, and the microstructure and tensile properties of the Al MMCs were investigated. When the volume fraction of SiC particles is fixed to be 5 %, the Al MMCs reinforced by nanosized and submicron particles exhibit much higher ultimate tensile strength and yield strength, and much lower ductility compared with those of the non-reinforced aluminum. However, for the MMC reinforced by 3.5 m SiC particles, almost no strengthening effect is found. The strengthening effect of the Al MMCs is analyzed in terms of dislocation mechanism. Moreover, the tensile fracture surface shows that the damage mechanism of the Al MMCs can be changed as the size of SiC particles is changed.

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Periodical:

Advanced Materials Research (Volumes 183-185)

Pages:

2129-2133

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.183-185.2129

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Online since:

January 2011

Authors:

Chun Lin He, Jian Ming Wang, Qing Kui Cai

Keywords:

Aluminum (Al), Metal Matrix Composite (MMC), Microstructure, Tensile Properties

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