Microstructural and mechanical studies of multi-walled CNTs/Mg composite fabricated through FSP

Abstract

Flourishing trend of aerospace and automobile applications endlessly demand for significantly higher encouraging performance lightweight materials. Potentially Magnesium got limelight for having lightweight physical property and thus has great potential to energize mechanical property by making its composites. Therefore, magnesium composite was fabricated by incorporating multi-walled carbon nanotubes (MWCNTs) as reinforcement into magnesium matrix at volume percentages 10, 20 and 30, respectively through friction stir processing (FSP). Furthermore, the effect of MWCNTs was investigated and validated through various characterizations. The X-ray diffraction (XRD) investigation ensured the existence of parent phases of materials. The mechanical properties of MWCNT/Mg composites such as tensile strength and micro hardness were investigated and found optimum results at 20 vol% MWCNTs. The optimum upsurge in tensile strength attained was twice relative to pure magnesium. Moreover, the wear test was conducted to analyse the wear behaviour. Since the grain growth was obstructed by MWCNTs reinforcement and encouraged to enrich grain refinement, thus the wear resistance was improved. However, the mechanical properties deteriorated beyond 20% due to clustering of reinforcement revealed from fracture study.

Creep and mechanical properties of aluminium A356 composites reinforced with coated and un-coated MWCNTs fabricated using the stir casting method

“…However, there was no considerable advantage in adding nano SiC particles to the aluminium matrix at high creep rates. Similar studies have been performed on the creep properties of aluminium composites reinforced with SiC nanoparticles [2-4], Al 2 O 3 nanoparticles [5], boron carbide nanoparticles [6,7], and carbon nanotubes [8-11].…”

Exploring the mechanical, metallurgical, and fracture characteristics of hybrid-reinforced magnesium metal matrix composite synthesized via friction stir processing route

“…Intense ductile fracturing of the produced Mg mono-surface composites seen on AZ61A/TiC is indicated by the larger dimples in Figure 10(d) compared to Figure 10(b) to (d) . 40 The fracture surface of Mg surface hybrid composites, however, shows minor dimples and smooth surfaces, which suggests a tenuous link between the matrix metal and the reinforcement particles (SiC, TiC, and FA), as can be seen in Figure 10(f). The reduction of dimples with hybrid reinforcement decreases the ductility of produced surface composites.…”

“…Due to its innate brittleness, the base AZ61A Mg alloy has a relatively rough and uneven fracture surface (refer to Figure 10(a)). As a result of FSP, the FSPed AZ61A Mg alloy exhibits a finer and 40 The fracture surface of Mg surface hybrid composites, however, shows minor dimples and smooth surfaces, which suggests a tenuous link between the matrix metal and the reinforcement particles (SiC, TiC, and FA), as can be seen in Figure 10(f). The reduction of dimples with hybrid reinforcement decreases the ductility of produced surface composites.…”

Mechanical and tribological behavior of friction stir processed AZ61/egg shell powder/WS2 Hybrid surface composite

“…Based on the property of the magnesium alloys, they are suggested for specific part and application. The common challenges of using magnesium alloys is the HCP atomic arrangement, making it difficult to work at room temperature [2]. Further magnesium alloys are susceptible to corrosion compared to its aluminum alternatives [3].…”