Abstract
In the present investigation, an attempt has been made to study the tribological properties of AA7075/SiC metal matrix composites. Tribological parameters viz., sliding distance (SD), sliding speed (SS) and load (L) were considered as input parameters for analyzing the effects on wear rate (WR) and coefficient of friction (COF) as the output responses. The experiments were performed at dry conditions in a pin on disc tribometer. Taguchi’s design of experiments was used to plan the experimentation. A total of 27 set of experiments were performed. The output responses were analyzed using signal to noise ratio analysis. Sliding distance was found to have significant effect on both wear rate and coefficient of friction. Both single and multi objective optimization of the tribological parameters were attempted using desirability analysis approach. The minimum wear rate of 24.33 µm was found at the combination of SD: 500 m; SS: 700 rpm; L: 10 N at a composite desirability of 0.958. The minimum COF of 0.201 was found at the combination of SD: 651.51 m; SS: 300 rpm; L: 30 N at a composite desirability of 0.7001. The simultaneous optimization of WR and COF was found at the combination of SD: 668.73 m; SS: 700 rpm; L: 30 N at a composite desirability value of 0.762. The minimum WR and COF was found to be 46.275 µm and 0.243 respectively.
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