Abstract
This paper reports the dry sliding wear behavior & Brinell hardness test of AA 5083 aluminium reinforced with SiC particles fabricated by stir casting technique. Different volume fraction of SiC particles (3, 5 and 7 wt%) were used for synthesis. The wear test has been conducted on pin-on-disc testing machine to examine the wear behaviour of the aluminium alloy and its composites. An attempt has been made to study the influence of wear parameters like applied load, sliding speed, sliding distance and percentage of reinforcement on the dry sliding wear of metal matrix composites (MMCs). A plan of experiments, based on the techniques of Taguchi, was performed to acquire data in controlled way. An orthogonal array of L9 (34) and signal to noise ratios as smaller the better was selected. Analysis of variance (ANOVA) was employed to investigate the influence of wear parameter on pin of aluminium MMCs. The correlation was obtained by multiple general regressions model. Finally, conformation tests were done to make a comparison between the experimental results foreseen from the mentioned correlation.
Highlights
Conventional monolithic materials have limitations with respect to achievable combinations of strength, stiffness, and density
This paper reports the dry sliding wear behavior & Brinell hardness test of AA 5083 aluminium reinforced with Silicon carbide (SiC) particles fabricated by stir casting technique
One can observe from Analysis of variance (ANOVA) analysis that 1) sliding speed, 2) Load, 3) sliding distance and 4) weight percentage of SiC particles has the influence on wear of the composite
Summary
Conventional monolithic materials have limitations with respect to achievable combinations of strength, stiffness, and density. The major advantages of AMCs compared to unreinforced materials are as follows: greater strength, improved stiffness, reduced density, good corrosion resistance, improved high temperature properties, controlled thermal expansion coefficient, thermal/heat. The presence of magnesium in aluminum alloy matrix during composite fabrication strengthens the matrix and scavenges the oxygen from the surface of the dis-persoid, leading to an increase in the surface energy, of the dis-persoids It can reduce Al2O3, either to form Al, MgA12O4 or MgO depending upon its concentration [3,4,5,6,7]. Al composites are used for making various components such as brake drum, cylinder liners, cylinder blocks, disk brakes, piston crown and drive shaft [8] These materials are developed for the production of high wear resistant components. On the present investigation an attempt is made to find the influence of wear parameters on dry sliding wear of the composites and to establish correlation between sliding speed, load, sliding distance, percentage of reinforcement and combined effect of these parameters on dry sliding wear of the composites and to carry out Brinell hardness test on composite specimens
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