MATRIX Al-ALLOYS FOR ALUMINA PARTICLE REINFORCED METAL MATRIX COMPOSITES (original) (raw)
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Material characterisation and mechanical properties of Al2O3-Al metal matrix composites
Journal of materials science, 2001
The mechanical properties of metal matrix composites (MMCs) are critical to their potential application as structural materials. A systematic examination of the effect of particulate volume fraction on the mechanical properties of an Al 2 O 3 -Al MMC has been undertaken. The material used was a powder metallurgy processed AA 6061 matrix alloy reinforced with MICRAL-20 TM , a polycrystalline microsphere reinforcement consisting of a mixture of alumina and mullite. The volume fraction of the reinforcement was varied systematically from 5 to 30% in 5% intervals. The powder metallurgy composites were extruded then heat treated to the T6 condition. Extruded liquid metallurgy processed AA 6061 was used to establish the properties of the unreinforced material. C 2001 Kluwer Academic Publishers
INVESTIGATION ON MECHANICAL PROPERTIES OF AL 7075-AL 2 O 3 METAL MATRIX COMPOSITE
Aluminum alloys are widely used in aerospace and automobile industries due to high strength to low weight ratio and their good mechanical properties such as better corrosion resistance and wear resistance, low thermal expansion as compared with other metals. The main objective of our work is to improve the mechanical properties such as impact strength, hardness of Aluminum based Metal Matrix Composite (MMC), and its relation with processing of the Alumina particulate (Al 2 O 3) as reinforced in Aluminum matrix. Aluminum 7075 alloy is chosen as matrix alloy, in which Aluminum is the base element. The work has been proposed for four different weight proportions of Al 2 O 3 to aluminum matrix (weight fractions are 2%, 4%, 6% and 8%). And the processing of the metal matrix composite is to be processed with stir casting setup and heat treated.
2011
This research tends to study the effect of change in volume fraction of alpha phase alumina on mechanical properties of a metal matrix composite specimens contain (AlαAl2O3). Specimens were prepared with the following volume fractions (10, 15, 20, 25, 30, 35, 40, and 45). Then effectof this change on hardness, maximum stress and strain, Young’s modulus, impactand wear resistance has been studied. Results of testing showed that while hardness, maximum stress, Young’s modulus, and impact strength increased markedly with volume fraction of alumina, wear rate, and maximum strain decreased with increasing of volume fraction.
Mechanical Behavior of Particle Reinforcedaluminium Matrix Composites – A Review
Metal Matrix Composites (MMCs) with improved mechanical properties and their relatively reduced cost have made them attractive for wide range of applications like aerospace, automotive, sports and electronics industries. The advantages of particulate-reinforced composites over others are their formability with cost advantage. Further, they are inherent with heat and wear resistant properties. In general, the Al-MMCs are found to have higher elastic modulus, tensile and fatigue strength over monolithic alloys. It is evident that the structures and properties of the reinforcements control the mechanical properties of the composites. However, it is difficult to establish a direct relationship between mechanical properties of the composites, volume fraction, type of reinforcement and surface nature of reinforcements.
International Journal of Technical Research & Science
The present study focused on the mechanical properties of stir casted Al 6063/Al2o3 (Alumina) reinforced metal matrix composites. Aluminum-alumina composites are used in various industries including fabrication, aerospace, automobile sectors etc. The properties like corrosion resistance, low density, and high modulus of elasticity, higher thermal and electrical conductivity make them a best choice for its applications in various industries. The present work focus on mechanical properties of the metal matrix composite including, tensile behavior, hardness and surface characteristics of Al 6063/Al2o3 (Alumina) reinforced metal matrix composites by varying the percentage of the reinforced element alumina in the base matrix allot Al 6063.The samples prepared by stir casting process by varying the percentage of alumina in the base matrix alloy Al 6063 were tested for finding the ultimate tensile strength followed by hardness and surface characteristics. The thickness of the sample were taken 6mm.The mechanical behavior was analyzed by varying the percentage of the alumina for finding the above mentioned mechanical properties for safe design and usage of the metal matrix composite.
Study of Mechanical and Tribological Properties of Aluminum-Alumina Metal Matrix Composites
Metal matrix composites are mostly used in automobile and aerospace industries due to its light weight and strength. Among the metal matrix composites, aluminum matrix composites are preferred over conventional materials because of their high strength to weight ratio, high wear resistance and low cost. Aluminum based metal matrix composites containing different volume fractions of alumina reinforcing particles were produced by powder metallurgy and the effect of the volume fraction of reinforcement on the structural and mechanical properties of the composites has been studied in an attempt to improve its mechanical and tribological properties. The specimens were investigated for microstructural changes using scanning electron microscope imaging technique and changes in mechanical properties were studied by performing compression, micro hardness and wear tests. The best result has been obtained at 2% weight fraction of alumina with pure aluminum showing improvement in resistance to compression, wear and improvement in hardness.
ACTA TECHNICA CORVINIENSIS, 2013
Among metallic matrices, Aluminum based matrix remains the most explored metal matrix material for the development of MMCs. This is primarily due to the broad spectrum of properties offered by aluminum based matrix composites at low processing cost. The mechanical behavior of aluminum alloy (6063) - alumina particulate composites developed using two step stir casting was investigated. AA 6063 – Al2O3 particulate composites having 6, 9, 15, and 18 volume percent of Al2O3 were produced. It is observed that AA 6063/Al2O3p composites having low porosity levels (≤ 3.51 %porosity) and a good uniform distribution of the alumina particulates in the matrix of the AA 6063 were produced. The tensile strength, yield strength, and hardness increased with increase in alumina volume percent while the strain to fracture and fracture toughness decreased with increasing volume percent alumina.
IRJET- Study of Mechanical and Tribological Properties of Aluminum-Alumina Metal Matrix Composites
IRJET, 2020
Metal matrix composites are mostly used in automobile and aerospace industries due to its light weight and strength. Among the metal matrix composites, aluminum matrix composites are preferred over conventional materials because of their high strength to weight ratio, high wear resistance and low cost. Aluminum based metal matrix composites containing different volume fractions of alumina reinforcing particles were produced by powder metallurgy and the effect of the volume fraction of reinforcement on the structural and mechanical properties of the composites has been studied in an attempt to improve its mechanical and tribological properties. The specimens were investigated for microstructural changes using scanning electron microscope imaging technique and changes in mechanical properties were studied by performing compression, micro hardness and wear tests. The best result has been obtained at 2% weight fraction of alumina with pure aluminum showing improvement in resistance to compression, wear and improvement in hardness.
Mechanical and Wear Properties of Al6063 Metal Matrix Composite Reinforced with Al2O3 Particles
International journal of recent technology and engineering, 2020
Composite material has replaced conventional material drastically in recent years, due to its strength to weight ratio, easy forming, cost-effectiveness, good aesthetic appearance. Metal matrix composite has successfully replaced in a structural application in the field of automobile, construction, aerospace, marine, medical etc. of which aluminum matrix has widely accepted high strength to weight ratio, ease of fabrication, corrosion resistance, and high resistance to wear, etc. In this study an attempt was made to investigate the effect of alumina Al 2 O 3 when reinforced with aluminum 6063 matrix, liquid metallurgy route (Stir Casting Technique) adopted for the preparation of composite, the reinforcement varied from 0 to 8wt% in steps of 2wt%. Mechanical, wear, fractography and X Ray diffraction studies conducted on prepared composite systems and testing done as per ASTM and ISO standard. After the test results revealed uniform distribution of reinforcement in matrix alloy, from mechanical test it was observed that as contain reinforcement is increased the mechanical properties like hardness, toughness, tensile strength have improved similar observation were made in wear test increase in containing reinforcement resulted better wear resistance, fractured tensile specimen was studied under Scanning electron microscope SEM which resulted in the mode of fracture for all composite systems and results shows the transition mode of fracture with increase in reinforcement, X-Ray Diffraction (XRD) studies were conducted to identify the presence of reinforcement on prepared specimen and results were successfully compared with JCPDS Cards.