Effect of %Vf Nano SiC on Mechanical Properties of Al6061 Composite with Sr and TiB Addition Produced by Stir Casting (original) (raw)
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Journal of Composite Materials, 2019
In this present work, an attempt is made to prepare Al6061–5%SiC–TiB2 hybrid composites using stir casting process by considering optimal process parameters such as stirring temperature, stirring speed, stirring time, preheating temperature, grain size and wt% of particulate reinforcement and examine their metallurgical effect and mechanical behaviour. The metal composite samples were prepared using stir casting process in which the amount of reinforcement of 5%SiC is kept constant, and second reinforcement of TiB2 is varied by its weight fraction of 2, 4, 6, 8 and 10%. The prepared dual particulates reinforced hybrid composites are characterised, and their microstructural, mechanical properties and fractograpy were evaluated as per the standards. Strong interfacial bonding between matrix and reinforcements which are the significance of improved wettability is due to Potassium Hexafluorotitanate salt addition, and preheating of particles of SiC at 800℃ and TiB2 at 250℃ is made befor...
Biointerface Research in Applied Chemistry
Metal matrix composites show attractive physical properties which strongly dedicated to achieving enhanced mechanical properties. So that, the Al6061 alloy matrix composites were synthesized by different weight percentages, up to 4 wt.%, of SiC reinforced nanoparticles prepared by stir cast process. The mechanical properties, including microhardness and tensile properties like ultimate strength, yield strength, ductility, and strengthening efficiency, were evaluated. Moreover, longitudinal velocity, shear velocity, elastic, Young’s, shear and bulk moduli, and Poisson’s ratio were measured by ultrasonic nondestructive technique. Furthermore, the relative density, apparent porosity, and electrical conductivity are also measured. The results showed remarkable improvements in the mechanical properties of all examined alloys by adding SiC nanoparticles. The microhardness, ultimate strength, Young’s modulus of the composites containing 4 wt.% SiC increased to 945.2 MPa, 246.6 MPa, and 97....
The Effect Of Sic And Addition Mg Volume Fraction On Characteristics Al6061-Sic Composite
International Journal of Scientific & Technology Research, 2020
Aluminium matrix composite is one of composite materials that has good mechanical properties and widely used in industry. The addition of Mg and SiC components increased the hardness number of the composite. While, the aluminium 6061 alloy is an alloy with the possibility of small shrinkage defects and better liquidity levels that affect the weldability and cast ability due to the silicon content of the alloy. (1) In this study the addition of Mg serves to increase the value of hardness, wetting ability of the matrix and reinforcement. (2) This study analyzed the addition of 3%, 5% 8% Mg and 8% SiC. The tests were done by hardness test, tensile test, microstructure observation, SEM, and XRD. (3) The highest hardness number was 87.67 HRB with the addition of 8% Mg while the highest tensile strength was 174.26 MPa with the addition of 5% Mg. (4) From the results of the study showed that the addition of Mg improves the mechanical properties of Al6061/SiC composites.
Effect of SiC Amount on the Properties of Al6061 Matrix Produced by Powder Metallurgy
2020
In the present study the effect of SiC amount on structural, physical and mechanical properties of Al matrix composite (AMCs) was investigated. Al6061 alloy and three composites were fabricated by powder metallurgy technique (0, 7.5, 10 and 13 wt.% of SiC). The prepared composites were characterized by X-ray diffraction, optical microscopy and Vickers hardness. Physical properties (Density) of the prepared Al6061-SiC composites were measured. The microstructures show a homogeneous distribution of SiC nanoparticles into the aluminium matrix. We have found a significant increase of hardness and density of the composites with the increase of silicon carbide quantity. However, it is noticed that the porosity of Al-SiC composites decreases with the increase of SiC amount.
Fabrication and characterization of Al6063/SiC composites
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2013
In this study, three samples of aluminum alloy with 5%, 10% and 15% SiC composites were fabricated using stir casting process. These samples were investigated using scanning electron microscope equipped with energy dispersive X-ray analysis system, X-ray diffraction analysis and differential thermal analysis techniques. Mechanical properties like hardness, ultimate tensile strength and impact strength of these samples were also investigated. The results revealed that a full homogeneous dispersion of SiC particles in aluminum matrix was obtained without addition of any wetting agent. The peak in the X-ray traces corresponds to the presence of aluminum and SiC and the absence of any significant reactive constituents. The differential thermal analysis curve showed an endothermic peak in aluminum matrix between 648°C and 650°C with a nil degradation of material. It was concluded from this study that improvement in mechanical properties of three samples has been achieved. Sample 3 with 15% SiC shows a maximum hardness value (Vickers hardness number) of 120, ultimate tensile strength of 190 MPa and impact strength of 18 J.
Materials Today: Proceedings, 2019
This experimental investigation deals with the effect of SiC content on aluminium alloy Al 6061. Composites were fabricated with varied (0, 1, 2, 3 and 5) weight percent of SiC content via stir casting method. Scanning electronic microscope test had confirmed the uniform distribution of reinforced particles. It was seen that the density of Al 6061/SiC composite was improved with the reinforcement of SiC content. Hardness and tensile tests were conducted to observe the mechanical properties of fabricated specimen. The hardness and tensile strength was significantly improved up to 5 wt% of SiC particles.
2014
The development of AA6061 aluminum matrix composites is of great interest in industrial applications for lighter materials with high specific strength, stiffness and wear resistance. In this paper we examine the effects of reinforced Al6061 alloy with 2 wt%, 4 wt%, 6wt% of SiC and 5 wt % Al2O3; being fabricated by liquid metallurgy (stir cast) method. The mechanical properties including hardness and wear resistances of the unreinforced alloy and reinforced have been measured. It has been observed that the addition of reinforced materials significantly improves wear resistances and hardness properties as compared with that of unreinforced matrix.
Evergreen, 2019
This study investigates the effect of addition of SiC particles on Al 6061 alloy. The composites are prepared with varied (0, 2, 4, 6 and 8) weight percent of SiC particles through electromagnetic stir casting technique. Scanning Electronic Microscope (SEM) is employed to examine the microstructure of the fabricated composite and results depict that SiC content were uniformly dispersed in the Al 6061 matrix. Density of the composite is increased due to high density of SiC particles in comparison to Al 6061 alloy. Hardness and tensile tests are performed to investigate the mechanical properties of composite. The hardness and tensile strength is significantly improved up to 8 wt % of SiC particles. The novelty of this archival work lie in fact that few experiments have been carried out for Al 6061/SiC composite and some significant insight for the electromagnetic stir casting is achieved in the performed experiment.
Studies on Al6061-SiC and Al7075-Al2O3 Metal Matrix Composites
The aluminum based composites are increasingly being used in the transport, aerospace, marine, automobile and mineral processing industries, owing to their improved strength, stiffness and wear resistance properties. The widely used reinforcing materials for these composites are silicon carbide, aluminum oxide and graphite in the form of particles or whiskers. The ceramic particles reinforced aluminum composites are termed as new generation material and these can be tailored and engineered with specific required properties for specific application requirements. Particle reinforced composites have a better plastic forming capability than that of the whisker or fiber reinforced ones, and thus they have emerged as most sought after material with cost advantage and they are also known for excellent heat and wear resistance applications. In this paper it is aimed to present the experimental results of the studies conducted regarding hardness, tensile strength and wear resistance properties of Al6061-SiC and Al7075-Al 2 O 3 composites. The composites are prepared using the liquid metallurgy technique, in which 2-6 wt. %'age of particulates were dispersed in the base matrix in steps of 2. The obtained cast composites of Al6061-SiC and Al7075-Al 2 O 3 and the castings of the base alloys were carefully machined to prepare the test specimens for density, hardness, mechanical, tribological tests and as well as for microstructural studies as per ASTM standards. The SiC and Al 2 O 3 resulted in improving the hardness and density of their respective composites. Further, the increased %'age of these reinforcements contributed in increased hardness and density of the composites. The microphotographs of the composites studied revealed the uniform distribution of 44 G. B. Veeresh Kumar, C. S. P. Rao, N. Selvaraj , M. S. Bhagyashekar Vol.9, No.1 the particles in the matrix system. The experimental density values were agreed with that of the theoretical density values of the composites obtained using the rule of mixture for composites. The dispersed SiC in Al6061 alloy and Al 2 O 3 in Al7075 alloy contributed in enhancing the tensile strength of the composites. The wear factor K obtained using computerized pin on disc wear tester with counter surface as EN31 steel disc (HRC60) and the composite pin as specimens, demonstrated the superior wear resistance property of the composites.
Scientific Reports, 2021
The utilization of agro-residues ash as complementary reinforcing materials continues to gain prominence for metal matrix composite (MMCs) development. A rarely investigated but largely available ash among these agro-residues is the palm kernel shell ash (PKSA). Thus, the present study investigates the influence of PKSA particulates hybridized with SiC on the physico-mechanical properties and microstructure of Al6063 metal composites. The composites are synthesized using the double stir-casting technique with SiC held constant at 2 wt.%, while the PKSA contents are varied from 0 to 8 wt.%. The phases present and morphology of the composites are investigated using X-ray diffractometer (XRD) and scanning electron microscopy (SEM), respectively. The density, porosity, hardness, tensile and fracture toughness tests are carried out on the hybrid composites. X-ray diffractometer revealed that for Al 6063, only Al cubic crystal system was identifiable within the matrix. However, for the re...