Optimization study on wear behaviour of aluminium 7075 hybrid composite containing silicon carbide and aluminium oxide using Taguchi method

Due to light weight, high strength to weight ratio, higher wear resistance aluminium and its alloy have got greater consideration as a matrix material in most of the composite applications. Al MMCs is used in preparation of pistons, cylinder barrel, break discs, gears, valves etc. Use of Al-Si alloys are increasing in areas of automobile and aerospace industries. Present study aims to investigate about wear behaviour of aluminium 7075 hybird composite with silicon carbide (SiC) and aluminium oxide (Al2O3) as reinforcements. Hybird composite material were processed through stir casting process. Addition of SiC is 3,6 and 9 wt.% whereas Al2O3 is fixed 5 wt.%. Wear test was conducted through unlubricated conditions. Wear rate was been recorded after each set of experiment carried through wear test. To optimize the control parameters Taguchi method was used as a statistical tool. L9 orthogonal array was utilized and investigational design was based on control factors namely SiC wt.%, load, sliding distance and response factor was wear rate to study the wear performance. Empirical relation was established for wear rate in relations of control variables by multiple regression analysis. Finally, analysis of variance (ANOVA) was used to evaluate the impact of specific factors on wear rate. MINITV.17.1.0 was used to analyse the results. It was observed that load and SiC wt.% were significant factor affecting response variable. Higher values of SiC wt.% increased the wear resistance.