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Abstract

This paper exhibits the investigative work conducted on the fracture toughness and microstructure of 6061Al-graphite particulate composites. The requisite specimens were prepared using stir casting technique with graphite proportions ranging from 3 to 12% by weight. The microstructure and interfacial bonding of 6061Al-graphite particulate composites were studied. Fracture toughness investigations were carried out on 6061Al-graphite for 3%, 6%, 9% and 12% of graphite by using single-edge notch bend (SENB) specimens. The maximum fracture toughness was found for 6061Al-9%Gr for a∕W = 0.45 and the value is 17.94 MPa $\surd$ m. Examination of specimen surface of 6061Al-graphite was done using scanning electron microscope (SEM). Due to good interface bonding and uniformity in distribution, improved fracture toughness properties are achieved.

Keywords

Aluminium-graphite particulates MMC SEM fracture toughness SENB

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