Investigations on mechanical properties of aluminum hybrid composites

By D. Prasad, C. Shoba, N. Ramanaiah. 2014

353 citations recorded by the source corpus.

Abstract A double stir casting process was used to fabricate aluminum composites reinforced with various volume fractions of 2, 4, 6, and 8 wt% RHA and SiC particulates in equal proportions. Properties such as hardness, density, porosity and mechanical behavior of the unreinforced and Al/ x %RHA/ x %SiC ( x = 2, 4, 6, and 8 wt%) reinforced hybrid composites were examined. Scanning electron microscope (model JSM-6610LV) was used to study the microstructural characterization of the composites. It was observed that the hardness and porosity of the hybrid composite increased with increasing reinforcement volume fraction and density decreased with increasing particle content. It was also observed that the UTS and yield strength increase with an increase in the percent weight fraction of the reinforcement particles, whereas elongation decreases with the increase in reinforcement. The increase in strength of the hybrid composites is probably due to the increase in dislocation density. A systematic study of the base alloy and composites was done using the Brinell hardness measurement and the corresponding age hardening curves were obtained. It was observed that in comparison to that of the base aluminum alloy, the precipitation kinetics of the composites were accelerated by adding the reinforcement. This effectively reduced the time for obtaining the maximum hardness by the aging heat treatment.

Subfields: Ceramics and Composites, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/fb019e24f51a511f631414e9a2561ab25e38e2c2

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In Ceramics and Composites

In Mechanical Engineering

Citations in the corpus

Characterization of hybrid aluminum matrix composites for advanced applications – A review (2016, background): “[32] Prasad DS, Shoba C, Ramanaiahet N.”
Microstructure, mechanical and fracture properties of groundnut shell ash and silicon carbide dispersion strengthened aluminium matrix composites (2016, background): “Several other reports on property optimisation in metal matrix composites (MMC) using hybrid reinforcements are available in the literature (Dolata et al., 2012; Lei et al., 2014; Poovazhagan et al., 2013; Prasad et al., 2014).”
Mechanical performance of particulate-reinforced Al metal-matrix composites (MMCs) and Al metal-matrix nano-composites (MMNCs) (2017, background): “D -1/2 are quantified, the values are regressively approximated as *180, *170, and *1800 MPa lm1/2 for the samples of Refs.”
Aluminium matrix hybrid composites: a review of reinforcement philosophies; mechanical, corrosion and tribological characteristics (2015, background): “6 – Variation of CTE and dislocation density with % reinforcement reprinted from [50] with permission from the author.”
Processing issues, machining, and applications of aluminum metal matrix composites (2018, background): “This discussion presents following factors that may affect the mechanical properties: reinforcement type,([191]) amount of reinforcement,([192]) reinforcement particle size,([188]) porosity amount,([96]) wetting agent,([62]) stirring speed,([1]) stirring time,([62]) and heat treatment.([184])”