A comprehensive analysis to assess the impact of nano MoS₂ on the wear characteristic of Al-TiB₂-Gr composite

Abstract

The present study evaluates the influence of nano MoS2 particles on the wear properties of newly developed TiB2 and Graphite reinforced Aluminium composite. Micro particles of MoS2 are downsized into nano levels using a planetary ball mill. Three different compositions of specimens are fabricated through stir casting, with a constant 10% of weight of TiB2, graphite, and nano MoS2 is kept at varying amounts of 10, 15, and 20%. The dry sliding wear tests are executed by following Taguchi's design of experiment. The wear rate and coefficient of friction are considered as responses, whereas the normal load, sliding distance and the composition of MoS2 are considered as the chief parameters with three levels. The hybridized Taguchi-Grey Relational -Principal Component Analysis mathematical model is implemented to study the effect of wear parameters and inclusion of MoS2 on the wear behavior. Mathematical and experimental results explore the increasing nano MoS2 content reduces the wear rate and coefficient of friction of composites. Analysis of variance results also acknowledge that nano MoS2 content in the composite is a remarkable parameter to impact the tribological property. The hybrid statistical model results explore that the optimum parameter to yield better tribological property are 30 N normal load, 2 km sliding distance and 20 % of MoS2. Worn surfaces are analyzed using scanning electron microscopy to picturize the wear mechanism concerning the varying content of reinforcement.

Dry sliding wear behavior of aluminum alloy 6082 - SiC composites through ex-situ casting process

“…Similarly at higher load, the improved contact pressure leads to catastrophic failure of lubricant layer, particle fracturing and delamination which increases the wear rate. 30, 31…”

“…Similarly at higher load, the improved contact pressure leads to catastrophic failure of lubricant layer, particle fracturing and delamination which increases the wear rate. 30,31 The specific wear rates from the tribological studies have given the tribo-mechanism of the alloy and the composites. At the same time SiC reinforcement enhanced the bulk hardness of MMC composites which reveals the improved wear resistance in the MMCs.…”

“…It was observed that catastrophic failure of the lubricant layer in a brittle manner at higher load leads to higher wear rate. 30,31 Research works by Venkataraman and Sundararajan, 32 N. Natarajan et al 33 and A. Daoud 34 showed increase in coefficient of friction value with increase in load during dry sliding wear of particulate Aluminum alloy matrix composites. While, research studies by Bindumadhavan et al, 35 Yalcin et al, 36 Straffelini et al 37 and Ipek 38 showed the decrease in coefficient of friction value with increase in load during dry sliding wear of particulate Aluminum matrix composites.…”

Assessing the role of reinforcement size and weight percentage on the mechanical and wear characteristics of Al7050‐TiO2‐hBN hybrid composites

“…It was clearly demonstrated in the other work that the presence of CNTs along with TiO 2 enhances the tribological performance of Al based composites [15]. Venkatesh et al [16] also observed the promising role of MoS 2 in enhancing the tribological properties of Al-TiB 2 -Graphene hybrid composite. Luana A Batista et al [17] developed hybrid composite of Al-Al7050-MWCNT by hot extrusion process and subjected to age hardening.…”

Machinability Performance Investigation of TiAlN‐, DLC‐, and CNT‐Coated Tools during Turning of Difficult‐to‐Cut Materials

“…Recently, the development and application of novel materials have been gaining popularity among the machining community. Most of these materials have hard reinforcing components and phases that greatly enhance their mechanical characteristics [1][2][3] but are difficult to machine, especially titanium alloys.…”