Wear behaviour of aluminium/alumina/graphite hybrid metal matrix composites using Taguchi's techniques

Abstract

Purpose -Recent advances in modern technology have generated the need to develop newer materials for better antifriction and wear properties. The objective is to analyse the significance of design parameters that significantly affects the dry sliding wear. Design/methodology/approach -The tribological behaviour of aluminium alloy (Al-Si10Mg) reinforced with alumina and graphite produced by liquid metallurgy is studied using pin-on-disc wear test apparatus under dry sliding condition. Experiments are conducted based on the plan of experiments generated through Taguchi technique. A L27 Orthogonal array is selected for analysis of the data. Influence of applied load, sliding speed and weight percentage of reinforcements on wear rate as well as the coefficient of friction during wearing process is studied using analysis of variance technique and regression equations for each response are developed. Finally, confirmation tests are carried out to verify the experimental results. Findings -Mechanical property such as hardness has been evaluated and it was found that the hardness increases as reinforcement content increases. The wear rate and coefficient of friction increases by increasing load and decreases by increasing sliding speed and weight percentage of reinforcements. Results from analysis of variance reveals that the applied load has the highest influence on both wear rate and coefficient of friction, followed by sliding speed and weight percentage of reinforcement. Practical implications -Aluminium hybrid metal matrix composites showing ample success in improving strength and wear resistance by utilising the optimal process condition. Originality/value -The results obtained by this method are useful in improving the dry sliding wear resistance.

Dry Sliding Wear Performance of ZA27/SiC/GraphiteComposites

“…Results from References [18][19][20] indicate that the alumina particle content can have a positive influence on the tribological behaviour of the ZA27 alloy-based hybrid composite.…”

Fabrication of LM25/SiO2 Metal Matrix Composite and Optimization of Wear Process Parameters Using Design of Experiment

“…L16 orthogonal array was selected for the present investigation and the degree of freedom for the orthogonal array should be greater than or equal to, the sum of the variables [21]. The parameters and the corresponding levels are shown in Table 2.…”

Parametric studies on dry sliding wear behaviour of Al-7075 alloy matrix composite using S/N ratio and ANOVA analysis

“…They revealed that the volume fraction of reinforcement was the most decisive parameter on wear rate. Radhika et al [10] investigated the wear and frictional behaviour of Al/alumina/ graphite hybrid MMCs and understood that graphite as primary reinforcement increases the wear resistance of the produced composites and sliding distance was the most predominant factor on the output responses. Ramakoteswara Rao et al [11] performed the dry sliding wear and friction behaviour of AA7075 filled with TiC particulates composites and reported that the wear rate and COF decreased with increases the weight percentage of TiC content.…”

“…Since it is very simple and inexpensive method, flexibility and homogeneous dispersion of ceramic particles can be achieved by mechanical stirring action [7]. Some literatures reported that the effect of different variables on tribological characteristics of AMCs [8][9][10][11][12][13][14][15][16][17][18]. Baskaran et al [8] studied the effects of wear control parameters like reinforcement, load, sliding velocity and sliding distance on wear rate.…”