Mechanical and Wear Behaviour of Nano‐Fly Ash Particle‐Reinforced Mg Metal Matrix Composites Fabricated by Stir Casting Technique

Abstract

In recent years, magnesium-based alloys and composites have great attention in automobile, structural, and biomedical industries due to their desirable characteristics such as lower density, low elastic modulus, high specific strength, better damping properties, and excellent castability. The pure magnesium was used as a matrix material and reinforced with fly ash fillers of different compositions with a weight percentage of 2.5%, 5%, and 7.5% to compare with the pure magnesium. The three different weights (wt%) of fly ash/Mg samples were prepared using the bottom pouring stir casting method. Fabricated samples sliding wear characteristics and mechanical behaviour (ASTM standard) were studied. Wear, tensile, and hardness results portray that 7.5 wt% fly ash composites possess better elongation and hardness and good wear resistance. The tensile strength values were improved by 42% in sample 4 compared with pure Mg. Hardness values were also improved by 21% in sample 4 compared with pure Mg. The wear rate and coefficient of friction are also reduced by the increased weight percentage of fly ash reinforcement. SEM images display casted pure magnesium’s morphology and wear-tested samples’ worn surface characteristics.

RETRACTED: Tribological and microstructure studies of LM26/SiC metal matrix composite materials and structures for high temperature applications

“…Govindarajan et al [6] emphasized on the importance of MMCs in automobile industries since they play a critical role in offering a lightweight material exhibiting both high stiffness and sturdiness. Santhosh et al [7] reported that MMCs containing magnesium is potentially going to become one of the widely-used materials due to possessing higher energy efficiency as well as recyclability. One prominent application will be in magnesium-based materials for the automotive industry for having approximately 20% to 30% fuel-saving ability.…”

Parametric optimization of wear parameters of hybrid composites (LM6/B4C/fly ash) using Taguchi technique

“…The reinforcement volume fraction is an essential factor. Materials with high hardness and sufficient fracture toughness are necessary to provide a decreased wear rate for the counter face (Santhosh et al, 2022b;Zaki et al, 2022).…”

“…This crucial volume fraction is influenced by the force used in the wear test (Zaki et al, 2022). Low wear rates were characterized by thin stable transfer layers and an almost constant wear coefficient; particle additions have decreased the SWR of the composites and delayed the transition with load from low wear coefficients to higher wear coefficients (Santhosh et al, 2022b). The MMCs with low fly ash weight percentages had significant wear, which grew linearly over time (Alam et al, 2022).…”

Applicability of Industrial Wastes in Metal Matrix Composites Production – A Review

“…The MMCs gained 26.60% more hardness and 16.10% more strength after the addition of 3.75% fly ash and 3.75% graphite. The use of fly ash in MMCs has also been investigated in other research, and they have shown benefits in mechanical characteristics and wear resistance over the basic alloy [100][101][102][103][104][105][106][107]. The mechanical qualities reported in this research, which used fly ash as the only reinforcement or as a supplementary reinforcement, are summarized in Table 3.…”