A Fractional Factorial Design Study of Reciprocating Wear Behavior of Al-Si-SiCp Composites at Lubricated Contacts

Abstract

The lubricated reciprocating wear behavior of two composites A319/15%SiC p and A390/15%SiC p produced by the liquid metallurgy route was investigated by means of an indigenously developed reciprocating friction wear test rig using a fractional factorial-design approach. The main purpose was to study the influence of wear and friction test parameters such as applied load, sliding distance, reciprocating velocity, counter surface temperature and silicon content in composites, as well as their interactions on the wear and friction characteristics of these composites. Two output responses (wear loss and coefficient of friction) were measured. The input parameter levels were fixed through pilot experiment conducted in the newly developed reciprocating friction and wear test rig. The counter surface material used for the wear study was cast iron having Vickers hardness of 244 HVN. It had been demonstrated through established equations that A390/15%SiC p composite is subjected to low wear compared to the A319/15%SiC p composite. The experimental results indicate that the proposed mathematical models suggested could adequately describe the performance indicators within the limits of the factors that are being investigated. The applied load, sliding distance, reciprocating velocity, counter surface temperature, and silicon content in composite are the five important factors controlling the friction and wear characteristics of the composite in lubricated condition. Moreover, the two factor interactions have a strong effect on the wear of composites. The results give a comprehensive insight into the wear of the composites.

Recovery of Titanium from Blast Furnace Slag

“…The experiments were conducted according to the fractional factorial design (FFD). As Rajeev et al showed, the resolution of the design used was resolution V with five parameters . A model with interaction terms was chosen to fit the experimental data.…”

“…Resolution V designs are excellent because they reduce the number of runs and still obtain clean results. 13 To ensure the adequacy of the regression of the model obtained in this study, tests for the significance of individual model coefficients and tests for lack of fit should be performed. Analysis of variance (ANOVA) is usually applied to summarize the tests performed.…”

“…Resolution V designs allow for the estimation of the main effect. Resolution V designs are excellent because they reduce the number of runs and still obtain clean results …”

“…As Rajeev et al showed, the resolution of the design used was resolution V with five parameters. 13 A model with interaction terms was chosen to fit the experimental data. With five factors, a 2 5 factorial designs require 32 runs.…”

The influence of alumina on mechanical and tribological characteristics of graphite particle reinforced hybrid Al-MMC

“…Wenlin et al [6] conducted experiments to study the effect of sliding speed on friction and wear performance of a copper-graphite composite and concluded that the coefficient of friction and wear rate of copper-graphite composites are largely dependent on sliding speed. Rajeev et al [7] studied the influence of wear and friction with respect to applied load, sliding distance, reciprocating velocity, counter surface temperature and silicon content in Al/SiC composites. Sai et al [8] studied the dry sliding wear behavior of copper fly ash composites using a pin on disc machine.…”