The effect of SiC and Cu weight fraction on the characteristics of Al 6061 composite (original) (raw)
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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.
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.
Investigation of mechanical behavior of Al 6063 & SiC composite materials
International Journal of Advanced Technology and Engineering Exploration, 2018
Proper mixing if material is very important factor because if mixing of material is not in proper way then the material is not coming in desirable properties for that we are using stir casting machining its help to mix up both materials in proper form [1]. Stir casting process is a liquid state process that helps in aluminium composites. Usually, the particulate reinforcement is distributed into the aluminium melt by mechanical stirring. The materials fabricated using stir casting process has excellent mechanical properties when compared to traditional materials. The hardness, thermal conductivity, melting point and some other behaviors changes in a composite material when compared with the traditional material. In recent years, aluminum and its alloys have had high rate of consumption compared to iron-steel products and are being used more in industries such as electrical, chemical, medicine, construction, automotive and aviation and their sub-industries, increasing their importance the more Al-Mg-Si alloys, apart from their importance in the aluminum industry and being called 6000 series. In the present work Al6063 material is used due to known for their
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.
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....
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.
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.
Synthesis and Evaluation of Mechanical properties of Al/ Sic Composite by Stir Casting Method
The main focus for this project is to find out the betterproportion of the AA6061 – Sic composite by analyzing their mechanical properties which has been made by stir casting method.The Mechanical properties of AA6061 Aluminium matrix composites (AMC's) when reinforced with Sic with varying weight percentages that can be used for high performance applications such as automotive ,aerospace, military and electrical industries has been evaluatedStir casting has been used to synthesize Al/Sic MMCs by reinforcing silicon carbide particles into aluminum matrix. The reason for using stir casting is to develop technology for the development of MMCs at affordable cost. The selection of Sic as reinforcement and Al as matrix isbecause of their easy availability. The practical data acquired, analyzed and optimized will beinterpreted in the light of information available in the literature and be shared with the relevant industries. The present work was mainly carried out to characterize the Sic/Al composite which was produced by reinforcing the various proportions of Sic (5, 10, and 15%) in aluminum matrix using stir casting technique. Itis noted that the volume fraction of Sic in the composite is gradually increased, the hardness and impact energy increase. However, beyond a level of 25-30 percent Sic, the results are not very consistent, and depend largely on the uniformity of distribution of Sic in the aluminum matrix.This work is focused to study the change in behavior of AA6061 aluminum alloy by adding different percentage of Sic Then tensile tests, hardness test, impact test performed on these samples which are produced by stir casting to investigatethe improved physical and mechanical properties.
Mechanical Properties of Al-Sic Composite Material By Melting Process
To overcome the problems faced in conventional materials like high weight, corrosion, high cost etc., lots of studies are going on to replace them with alloys/composites. And also to reduce the cost of composites. Aluminium materials found to be the best alternative with its characteristics like high strength to weight ratio and low density. As development of lightweight materials has provided numerous possibilities for weight reduction. In this project we are casting aluminium based (Al 6061) composites with silicon carbide as reinforcement. Among the various methods, stir casting method is chosen as it is simple, less expensive and used for mass production. In this stir casting process, the reinforcing phases are distributed into molten aluminium by manual stirring. And then the casted samples are machined to required dimensions and different material testings had been conducted to obtain the material properties and characteristics.. In this Experiment have been conducted by varying weight fraction of SiC (5%, 10%, 15%, 20%, 25%, and 30%), while keeping all other parameters constant. The results indicated that the method used in this is successful to obtain uniform dispersion of reinforcement in the metal matrix. This composite material has improved mechanical properties like strength, stiffness, abrasion and impact resistant, and is not easily corroded. This material will have improved applications in aerospace, automotive industry etc.
Herein, Aluminium 6061 with various weight percentage (1 %, 3 % and 5 %) of Silicon Carbide (SiC-40nm), composite was fabricated by single stir casting (single SC) and double stir casting (double SC) process. Besides, the mechanical properties like hardness, ultimate tensile strength and yield strength of the prepared composites were used to compared the effects of single SC and double SC process. Completely, these properties were enhaced with increment of the reinforcement upto 3%, and then decreased due heterogeneous distribution/ agglomeration. In addition, both processed samples of optimum level of reinforcement (3 % of SiC) morphology and quantitative analysis was carriedout. Overall, the double SC improved the nano particle distribution and mechanical properties than single SC process.