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Effects Of Porosity On Mechanical Properties Of Metal Matrix Composite: An Overview

Aqida, S. N. and Ghazali, M. I. and Hashim, J. (2004) Effects Of Porosity On Mechanical Properties Of Metal Matrix Composite: An Overview. Jurnal Teknologi A (40A). pp. 17-32. ISSN 0127-9696

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Abstract

Porosity in cast metal matrix composite (MMC) has been known as a defect affecting the enhancement of strength, particularly in particle-reinforced MMC. From previous reviews, among the causes of porosity formation are air bubbles entering the melt matrix material, water vapour on the particles surfaces, gas entrapment during mixing process, evolution of hydrogen, and shrinkage during solidification. Many studies had revealed that casting parameters are the main factors affecting porosity formation. Optimum properties of cast MMC are attained with least porosity content. Generally, increasing content of porosity will decrease the mechanical properties of MMC such as tensile strength, Young’s modulus, Poisson ratio, and damping capacity. The presence of porosity decreased the mechanical properties of cast MMC as the failure process is initiated from the voids formed.

Item Type:Article
Uncontrolled Keywords:Porosity, stir casting, mechanical properties, cast metal matrix composite, silicon carbide particle
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:1529
Deposited By: En Mohd. Nazir Md. Basri
Deposited On:07 Mar 2007 04:47
Last Modified:08 Nov 2010 07:08

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