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Title: Evaluation of drilled hole quality of Al-Si alloy/fly ash composites produced by powder metallurgical technique
Authors: Jailani, H Siddhi
Rajadurai, A
Mohan, B
Sornakumar, T
Keywords: Aluminium silicon alloy;Fly ash;Sintering;Microstructure;Drilling;Surface roughness
Issue Date: Aug-2015
Publisher: NISCAIR-CSIR, India
Abstract: Metal matrix composites have high strength to weight ratio, high toughness, high impact strength, low sensitivity to temperature changes and high surface durability. In the present study, aluminium silicon alloy - fly ash composites are developed using powder metallurgy technique. Aluminium silicon alloy powder is homogenously mixed with fly ash and uniaxially compacted. The green compacts are sintered at the temperature of 600ºC. The micro structural characterization, hardness and drilled hole quality in terms of surface roughness, diameter error and roundness error were studied on Al-Si alloy and Al-Si alloy - fly ash composites. Microstructure proved that the fly ash particles are located in grain boundary after sintering. The hardness of Al-Si alloy - fly ash composites is higher than that of Al-Si alloy due to grain refinement. The surface roughness of Al-Si alloy - fly ash composites increased with increasing speed, feed and fly ash content. The diameter error of Al-Si alloy and Al-Si alloy - fly ash composites is higher than that of roundness error.
Page(s): 414-420
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.22(4) [August 2015]

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