Study on Dry Sliding Wear and Friction Behaviour of Al7068/Si3N4/BN Hybrid Composites

Abstract

Hybrid aluminium metal matrix composites have the potential to replace single reinforced aluminium metal matrix composites due to improved properties. Moreover, tribological performance is critical for these composites, as they have extensive application areas, such as the automotive, aerospace, marine and defence industries. The present work aims to establish the tribological characteristics of Al7068/Si3N4/BN hybrid metal matrix composites prepared by stir casting route and studied using a pin-on-disc apparatus under dry sliding conditions. The hybrid composite samples were prepared at various weight percentages (0, 5, 10) of Si3N4 and BN particles. To investigate the tribological performance of the prepared composites, the wear experiments were conducted by varying the load (20, 40 and 60 N), sliding velocity (1.5, 2.5 and 3.5 m/s) and sliding distance (500, 1000 and 1500 m). Wear experimental runs were carried out based on the plan of experiments proposed by Taguchi. The minimum wear rate was found with the composite material reinforced with 10 wt. % of Si3N4 and 5 wt. % of BN. Analysis of Variance (ANOVA) was employed to analyse the effect of process parameters on wear rate and coefficient of friction (COF). The ANOVA test revealed that the weight fraction of Si3N4 has more of a contribution percentage (36.60%) on wear rate, and load has more of a contribution percentage (29.73%) on COF. The worn-out surface of the wear test specimens was studied using its corresponding SEM micrograph and correlated with the dry sliding wear experiment results.

High‐Stress Abrasive Wear Analysis of in Situ TiC‐Reinforced Zinc–Aluminum Composites Using Integrated Taguchi–TOPSIS Method

“…As a result, optimization methodologies may be the most practical alternative for determining the optimal processing conditions. Various techniques like Grey relational analysis (GRA), [9,10] genetic algorithm (GA), [26,27] artificial neural network (ANN), [28][29][30] response surface methodology (RSM), [31][32][33][34] fuzzy TOPSIS, [35,36] analysis of variance (ANOVA), [37] can be employed to address a range of these problems.…”

Investigation on the effect of reinforcement compositions on the properties of Aluminum LM 25/h-BN/B 4 C hybrid composites

“…Recently, Subramanian et al [22] studied the tribological characteristics of Al7068/Si 3 N 4 /BN hybrid metal matrix composites processed by stir casting. The weight percentage of Si 3 N 4 and BN particles are varied as 0, 5, 10.…”

The Laser Alloying Process of Ductile Cast Iron Surface with Titanium Powder in Nitrogen Atmosphere

“…The laser surface alloying process in comparison to laser melting allows for a wider influence on the structure and properties of surface layers by adjusting the chemical composition of a liquid metal pool by the addition of the alloying elements. Previous studies in this field have shown that the addition of elements with high affinity to carbon in the laser alloying process may result in the formation of an in situ composite structure in the surface layer area [16][17][18][19]. An example of such an element is titanium, which when added in the laser alloying of a ductile cast iron surface causes the formation of high-hardness titanium carbides in the structure of the surface layer, which has a beneficial effect on the wear resistance of the surface.…”