Effect of reinforcement on mechanical characteristics of A356 alloy nanocomposites

Abstract

Nanocomposites with aluminum base reinforced with nanoparticles, have wide application in many industries, for example, aerospace, marine, automobile, due to its lightweight, high tensile strength and high wear resistance, etc. The study of the microstructure, mechanical and tribological properties of the nanocomposite is very important in order to reliably and optimally carry out the design of new materials. In this study for the mechanical characterization of the A356 composites with a ceramic particle reinforcements nanoindentation was performed. Nanoindentaion is largely used for the analysis of mechanical properties. The samples of the nanocomposites were developed using 0, 0.2, 0.3 and 0.5 wt.% SiC, with an average size of particles of about 50 nm, produced by a compocasting process with pre-processing mechanical alloying. Nanoindentation was carried out based on Berkovich's test method with the indenter in shape of three sided diamond pyramid. The nanocomposite testing showed that the nanocomposites containing 0.5 wt.% of the reinforcement have slightly higher tensile strength and a lower value of the elastic modulus compared to the aluminum alloy base.

Optimization of parameters that affect wear of A356/Al2O3 nanocomposites using RSM, ANN, GA and PSO methods

“…Properties of aluminium metal matrix nanocomposites (MMnCs) depends highly on the distributions of nano-sized particles in the matrix (Bahmani et al , 2018; Varol et al , 2017; Velickovic et al , 2019b). A similar problem has been noticed at metal matrix composites (MMCs) where micro-sized reinforcements are used.…”

A review on mechanical properties of aluminium-based metal matrix nanocomposites

“…Based on the analysed literature, it is noticed that the hardness of the material is affected by the type of base material, type and size of reinforcement and its weight/volume content in the nanocomposite [9,13,[15][16][17][18][19][20][21][24][25][26][27][28][29][30][31][32]34,49].…”

“…Aluminium as the matrix of MMC (Al MMC) stands out from other metals (Cu, Ti, Mg and Fe) with its characteristics such as low density and high strength. By combining a light aluminium alloy with certain reinforcements, composite materials can be obtained for the production of components that achieve lower weight and high strength [7][8][9]. Tekale and Dolas, by reviewing the literature, found that for the production of MMCs, the most commonly used matrix is aluminium and aluminium alloys (Al, A356, Al359, Al2219, Al6061, Al7068, Al7075 and Al2024) with 75 %, followed by manganese with 10 %, titanium-based alloys with 3 %, copper and copperaluminium alloys with 5 % and others with 7 % [10].…”

“…Tekale and Dolas, by reviewing the literature, found that for the production of MMCs, the most commonly used matrix is aluminium and aluminium alloys (Al, A356, Al359, Al2219, Al6061, Al7068, Al7075 and Al2024) with 75 %, followed by manganese with 10 %, titanium-based alloys with 3 %, copper and copperaluminium alloys with 5 % and others with 7 % [10]. The type of reinforcement has been chosen based on the application of the Al MMCs, where the most commonly used are Al 2 O 3 and SiC [7][8][9].…”

Experimental Studies of the Machinability of SiCp/Al with Different Volume Fractions under Ultrasonic-Assisted Grinding

“…Veličković et al analyzed the impact of adding a small percentage of silicon carbide (SiC) particles into an aluminum matrix with nanocomposites of 0, 0.2, 0.3, and 0.5 wt.% SiC. They noticed that a small amount of SiC particle reinforcement (0.2 and 0.3 wt.%) does not improve the wear resistance of the nanocomposite; however, nanocomposites containing 0.5 wt.% of the reinforcement have a higher tensile strength and wear resistance [ 26 , 27 ]. Xiang et al performed scratch experiments with a single diamond particle on materials with volume fractions of 25%, 40%, 55%, and 70%.…”