Fabrication and Modelling of Tribological Performance of Al-Si/12Al2O3/2MoS2 Composite using Taguchi Technique

Abstract

This paper investigates the effect of mechanical, microstructural and dry sliding wear behaviour of Al-Si/2wt%MoS2, Al-Si/12wt%Al2O3, and Al-Si/12wt% Al2O3/2wt%MoS2 composites that prepared using the stir-casting route. To avoid friction and wear at the interfaces of materials, an attempt has been made by adding solid lubricant MoS2 to build such a self-lubricating composite with Al-matrix. The tribological analysis has been described based on the Taguchi orthogonal array (L27). Three variables combination such as sliding velocity, sliding distance and contact pressure are used for this study to determine the tribological responses, i.e. wear rate and coefficient of friction. The properties of composites were improved by increasing the weight % of MoS2 and Al2O3. The tensile strength of Al-Si/2MoS2, Al-Si/12Al2O3, and Al-Si/12 Al2O3/2MoS2 composites is 6.02%, 12.46%, and 2.44% compared to the base matrix. The addition of MoS2 helps the hybrid composite to attain better tribological properties with a slightly lower specific strength. Analysis of variance showed that the composites such as Al-Si/2 MoS2 and Al-Si/12Al2O3/2MoS2 were strongly influenced by the pressure in wear rate. Similarly, sliding velocity affects the coefficient of friction for Al-Si/2MoS2. Wear tracks formed during the dry slide process were analysed using optical and SEM with an EDS. It was discovered that pressure plays a vital effect in the wear mechanism. The hybrid composite (Al-Si/12 Al2O3/2MoS2) material can be utilised in place of conventional materials in tribological demanding automotive applications

An Experimental Investigation of Dimple-Texturing on the Tribological Performance of Hardened AISI H-13 Steel

“…As a result, the MoS2 coating on the nontextured surfaces disappeared quickly. These findings are in line with the literature [10,23]. Figure 5 clearly illustrates the development of a thin layer of MoS2 film on the tribo-contact surface of dimple-textured and smooth nontextured test specimens.…”

“…Graphite and molybdenumdi-sulfate (MoS2) are common solid lubricants used for high load and high-temperature applications. Additionally, MoS2 exhibits various significant characteristics, including lubricity under high loads, fret safety, an anti-slip effect, wear resistance, and resistance to corrosion [10]. Laser dimple-texturing is frequently employed in tribological surface topography alterations with minimal deformation impacts.…”

Assessment of mechanical and tribological performance of hybrid Al/MoS2/Al2O3 composite by GFRA

“…When two pairs of moving parts are in contact with each other, they create an adhesive coating between them that decreases the deformations of their respective pin tracks. When examining the worn surface, it is possible to see a crisp delaminated layer that liberates the contacting pair and slows the rate of wear [10,27,28]. This is because oxide particles from Al2O3 have been plugged and broken up, so the tribo-surface of the Al-alloy /4Al2O3 substances (Fig.…”

Morphology and Mechanical Behavior of Friction Stirred Aluminum Surface Composite Reinforced with Graphene

“…ASCs with the addition of ceramic reinforcements exhibit high strength, hardness, and elasticity character owing to the microstructural improvement 7) . The previous literature shows the incorporation of numerous reinforcements like B4C, TiC, Al2O3, SiC, TiB2, ZrB2, and TiO2 to matrix material (Aluminum alloy) to get the as-wanted properties of the fabricated composites [8][9][10][11][12] . Bourkhani et.al considered the interfacing of Al2O3 particulates as reinforcement with FSP tool pin in AA1050 aluminum alloy as a matrix using friction stirs processing technique.…”