B K , Prasad and Dr., O. P. Modi and Dr., A H Yegneshwaran and Dr., M. L. Vaidya (1992) Dry Sliding Wear Behaviour of Squeeze Cast Aluminium Alloy-Silicon Carbide Composites. Materials Science and Engineering, 15A. pp. 235-245. ISSN 0921-5093

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Abstract

Squeeze cast Al alloy (BBS: LMI 1) matrix composites,, each containing 10 vol.% of Sic particles or fibres, have been investigated for their resistance to dry wear under varying applied pressures (1-3 MPa) at a sliding speed of 2.68 m s-1 against a rotating EN25 steel disc. Seizure pressure of the composites as well as the base alloy was determined using a pin-on-disc machine. The alloy containing SiC particles showed less wear rate than the one having SiC fibre dispersion. The base alloy showed maximum rate of wear. Dispersoid-matrix interfacial bonding and shape of the dispersoid were found to play an important role in governing the wear rate of the composites. Scanning electron microscopy examinations indicated relatively finer grooves on the wear surfaces prior to seizure, while seizure led to severely damaged surfaces. Similarly, wear debris generated during wear was thin and flaky prior to seizure, while bulky debris particles were observed during seizure. A few iron machining chips were also found in all the cases. The results obtained have been explained on the basis of wear-induced microstructure changes and deformation, leading to work hardening in the subsurface regions and wear debris

Item Type:	Article
Subjects:	Material/Component Development, Processing and Characterization > Tribology
Divisions:	UNSPECIFIED
Depositing User:	Mr. B.K. Prasad
Date Deposited:	19 Jul 2013 12:31
Last Modified:	28 Feb 2014 09:37
URI:	http://ampri.csircentral.net/id/eprint/13

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