Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/2755
Title: Enhancement in tribological behaviour of functionally graded SiC reinforced aluminium composites by centrifugal casting
Authors: Akhil S, Karun
Rajan, TPD
Pillai, UTS
Pai, B C
Rajeev, V R
Farook, A
Keywords: Functionally graded materials
centrifugal casting
metal matrix composites
aluminium
silicon carbide
wear
Issue Date: 2016
Publisher: Sage
Citation: Journal of Composite Materials,50(16):2255–2269
Abstract: Enhanced tribological and location-specific properties achieved in functionally graded metallic composites make them potential materials for futuristic engineering components. The present investigation aims on the processing of homogenous and functionally graded Al matrix composites reinforced with SiC particles of 23 mm average particle size by gravity and centrifugal casting techniques. The sizes of the primary aluminium and eutectic silicon phases are finer towards the outer periphery due to the higher solidification rate. Functionally graded Al–SiCp composite rings produced by centrifugal casting show higher concentration of SiCp towards outer periphery, followed by a gradient transition region and the particle depleted zone. Particle agglomerates formed due to partially wetted particles associated with voids and gas porosities segregate towards the inner periphery. The higher concentration of reinforcement particles near the outer periphery in FGM enhances the hardness and wear resistance in rotary and reciprocating wear studies. Centrifugal cast alloys show enhanced wear resistance than the gravity cast specimen due to fine grains of primary aluminium and eutectic silicon. The rotary and reciprocating wear test shows the adhesive and abrasive type wear mechanisms
URI: http://hdl.handle.net/123456789/2755
Appears in Collections:2016

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