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Tensile Behaviour of Nano-Particulate Reinforced Aluminium Matrix Composites at Elevated Temperatures

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Abstract:

The tensile behaviour of nanometric SiC particulate (SiCp) reinforced aluminium matrix composites (AMCs) was examined at room temperature, 215°C and 350°C. These AMCs were produced via powder metallurgy (P/M) using Al 7075 powder reinforced with different volume fractions (1 vol.%, 3 vol.% and 5 vol.%) of nano-SiCp. The experimental results exhibit that at room temperature un-reinforced Al has both maximum strength and ductility whereas the 5 vol.% SiCp/Al composite has only maximum stiffness. Similar trends were obtained for tests performed at 215°C. However at 350°C, the 1 vol.% SiCp/Al composite has the highest stiffness. Optical microscopy and scanning electron microscopy were performed for microstructure study, examination of the SiCp distribution in the Al matrix and fractography.

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Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

761-764

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.761

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Online since:

October 2007

Authors:

A. Ahmed, A.J. Neely, K.K. Shankar, Sammy Lap Ip Chan

Keywords:

Aluminum Matrix Composite (AMC), High-Temperature, Particulate, Tensile Testing

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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