Structural and mechanical characterization of stir cast Al–Al2O3–TiO2 hybrid metal matrix composites

2020 ◽  
Vol 54 (21) ◽  
pp. 2985-2997 ◽  
Author(s):  
Naseem Ahamad ◽  
Aas Mohammad ◽  
Kishor Kumar Sadasivuni ◽  
Pallav Gupta
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
Metal Matrix Composites ◽  
Titanium Oxide ◽  
Metal Matrix ◽  
Aluminium Oxide ◽  
Aluminium Matrix ◽  
Reinforcement Particle ◽  
Matrix Composites ◽  
Hybrid Metal Matrix Composites

The present paper reports the effect of aluminium oxide and titanium oxide reinforcement on the properties of aluminium matrix. Aluminium matrix reinforced with aluminium oxide–titanium oxide (2.5, 5.0, 7.5 and 10 wt.%) in equal proportion were prepared by stir casting. Phase, microstructure, energy dispersive spectroscopy, density, hardness, impact strength and tensile strength of prepared samples have been investigated. X-ray diffraction reports the intermediate phase formation between the matrix and reinforcement phases due to interfacial bonding between them. Scanning electron microscopy shows that aluminium matrix has uniform distribution of reinforcement particle i.e. aluminium oxide and titanium oxide. Density of composite decreases due to variation of reinforcement and it shows low density after preheating. Hardness decreases due to the amalgamation of reinforcements. Impact strength was found to increase with the addition of reinforcements. Hybrid composite of aluminium matrix and (5% aluminium oxide + 5% titanium oxide) reinforcements have maximum engineering and true ultimate tensile strength. It is expected that the present hybrid metal matrix composites will be useful for aircraft rivets.

Phase, microstructure and tensile strength of Al–Al2O3–C hybrid metal matrix composites

2020 ◽  
Vol 234 (13) ◽  
pp. 2681-2693 ◽  
Author(s):  
Naseem Ahamad ◽  
Aas Mohammad ◽  
Kishor Kumar Sadasivuni ◽  
Pallav Gupta
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Intermediate Phase ◽  
Stir Casting ◽  
Aluminium Matrix ◽  
Equal Proportion ◽  
Matrix Composites ◽  
Hybrid Metal Matrix Composites

The aim of the present study is to investigate the effect of alumina (Al2O3)–carbon (C) reinforcement on the properties of aluminium matrix. Aluminium matrix reinforced with Al2O3–carbon (2.5, 5, 7.5 and 10 wt.%) in equal proportion was prepared by stir casting. Phase, microstructure, EDS, density, hardness, impact strength and tensile strength of prepared samples have been investigated. X-ray diffraction reports the intermediate phase formation between the matrix and reinforcement phase due to interfacial bonding between them. Scanning electron microscopy shows that Al matrix has uniform distribution of reinforcement particles, i.e. Al2O3 and carbon. Density decreases due to variation of reinforcement because ceramic reinforcement has low density. Hardness decreases due to variation of carbon since it has soft nature. Impact strength was found to increase with addition of reinforcement. Hybrid composite of Al and 5% Al2O3 + 5% carbon reinforcement has maximum engineering and true ultimate tensile strength. It is expected that the present hybrid metal matrix composites will be useful for fabricating stock screws.

Experimental investigation of Mechanical and Tribological Properties of Al6061-ZrC-B4C Hybrid Composites

2020 ◽  
Author(s):  
Theerkka tharaisanan Rajamanickam ◽  
Kathiresan Marimuthu
Keyword(s):  
Tensile Strength ◽  
Wear Resistance ◽  
Impact Strength ◽  
Metal Matrix Composites ◽  
Tribological Properties ◽  
Metal Matrix ◽  
Hybrid Composites ◽  
Zirconium Carbide ◽  
High Wear Resistance ◽  
Matrix Composites

Aluminium metal matrix composites (AMMC’s) have been widely used because of their superior properties like high strength to wear ratio, high wear resistance, and higher heat conduction rate. The additions of reinforcements in the form of discontinuous particles lead to an increase in the properties of Metal Matrix Composites (MMC). In this present work, the ALMMC composite was fabricated with the addition of discontinuous reinforcement particles of Zirconium Carbide (ZrC) and Boron Carbide (B4C). The mechanical properties such as tensile strength, hardness, and impact strength were tested as per the ASTM standards. The tribological properties were tested using a pin-on-disc setup under different loading conditions (10, 20, 30, 40 N). Moreover, the morphological characterization of ALMMC was carried out by using the Scanning Electron Microscope (SEM) analysis. Furthermore, the Differential Thermal Analysis (DTA) and Thermogravimetric Analysis (TGA) was accomplished to find the thermal stability of ALMMC. The findings show that the variations of reinforcement of ZrC added had given improved properties like hardness, tensile strength, impact strength and wear resistance.

Effect of Reinforcements on Mechanical Properties of Nickel Alloy Hybrid Metal Matrix Composites Processed by Sand Mold Technique

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Kumaraswamy Jayappa ◽  
Vijaya Kumar ◽  
Gange Gowda Purushotham
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Hybrid Composites ◽  
Research Work ◽  
Weight Percent ◽  
Matrix Composites ◽  
Hybrid Metal Matrix Composites ◽  
Ni Alloy

Hybrid Metal Matrix Composites (HMMCs) have gained wide applications in aerospace, marine, and domestic areas because of its significant properties relative to external forces and enabling environment. In present research work, Ni-alloy selected as a matrix and Al2O3 of 40–80 μm and TiO2 of 1–5 μm were selected as reinforcements. The composites were prepared by keeping 9 wt. % of TiO2 as unvarying and Al2O3 is varied from 3 weight % to 12 weight % in steps of 3 weight %. Induction furnace is used for the casting of composites and mixing is done by using mechanical stirring at 160 rpm for a time period of 5 min. The prepared composites are then tested for their tensile and hardness as per the ASTM standards. The Scanning Electron Microscopy was used for microstructural study. From experimentation, it was observed that increment in the weight percentage of Al2O3 with constant TiO2 increases the mechanical properties of hybrid composites and proper stirring improves homogeneity in the composite material. The test results show that the addition of Al2O3 up to 9 weight percent increases in tensile strength compared to Ni alloy and tensile strength slowly decreases with the addition of Al2O3 and that the hardness values are directly proportional to the weight percent of the addition of Al2O3 / TiO2.

Evaluation of Mechanical Properties of Aluminium Alloy 7075 Reinforced with SiC and Al2O3 Hybrid Metal Matrix Composites

2015 ◽  
Vol 766-767 ◽  
pp. 246-251 ◽  
Author(s):  
P. Pugalethi ◽  
M. Jayaraman ◽  
A. Natarajan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminium Alloy ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Weight Ratio ◽  
Hardness Test ◽  
Matrix Composites ◽  
Hybrid Metal Matrix Composites ◽  
Structural Applications

Aluminium based Metal Matrix Composites (MMCs) with Aluminium matrix and non-metallic reinforcements are finding extensive applications in automotive, aerospace and defence fields because of their high strength-to-weight ratio, high stiffness, hardness, wear-resistance, high-temperature resistance, etc. Composite materials are frequently chosen for structural applications because they have desirable combinations of mechanical characteristics. Development of hybrid metal matrix composites has become an important area of research interest in Material Science. In this work, the Aluminium alloy is reinforced with 3,5,7,9 wt. % of Al2O3 and 2 wt. % of SiC to prepare the hybrid composite. The present study is aimed at evaluating the physical properties of aluminium 7075 in the presence of silicon carbide, aluminium oxide and its combinations. The compositions are added up to the ultimate level and stir casting method is used for the fabrication of aluminium metal matrix composites. The mechanical behaviours of metal matrix composites like tensile strength, and hardness test are investigated by conducting laboratory experiments. Mechanical properties like micro hardness and tensile strength of Al7075 alloy increase with the addition of SiC and Al2O3 reinforcements.

scholarly journals Analysis of Al 6061-TiO2 -CNT Metal Matrix Composites Produced by Stir Casting Process

2018 ◽  
Vol 8 (03) ◽  
Author(s):  
Shashank Dewangan ◽  
S. K. Ganguly ◽  
R. Banchhor
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Hybrid Composites ◽  
High Strength ◽  
Weight Fraction ◽  
Stir Casting ◽  
Matrix Composites ◽  
Al 6061

Aluminium Hybrid Composites are the new group of metal matrix composites (MMCs) due to their attractive properties like high ductility, high conductivity, light weight and high strength to weight ratio and is a response to the dynamic ever-increasing demand of these super material in the field of aircrafts and marines. Carbon Nanotube (CNTs) are also known for their high strength and stiffness and their low density which when combined together makes CNTs an ideal reinforcement. This work briefly reviews the research revelation of an Aluminium (Al-6061) based hybrid metal matrix composite reinforced with CNTs and TiO2. The Hybrid Aluminium Metal Matrix Composites (AMMCs) is prepared with various CNTs weight percentages (0, 0.5, 1 and 1.5 wt. %) and keeping TiO2 weight percentage fixed to 1%.Stir Casting (SC) is focused in general to successfully fabricate the MMCs. The discussion of this work revolves around tensile test, hardness test, and Scanning Electron Microscope (SEM) of the MMC. The mechanical properties of the fabricated MMCs materials like tensile strength, hardness and impact strength is found by using these experimental methods. It has been observed that the tensile strength of the MMCs increases in the presence of TiO2 and CNTs and increases even more with the increase in the weight fraction of CNTs. Same results have been obtained for hardness and impact strength where there is an increase in them in the presence of TiO2 and CNT and their value increases even further with increase in weight fraction of CNTs.

Material Characterization Study on Aluminium Metal Matrix Composites by Enhanced Stir Casting Method

2014 ◽  
Vol 984-985 ◽  
pp. 326-330
Author(s):  
T.M. Chenthil Jegan ◽  
D. Ravindran ◽  
M. Dev Anand
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Tensile Strength ◽  
Boron Carbide ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Stir Casting ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Casting Method

Metal Matrix Composites possesses high mechanical properties compared to unreinforced materials. Aluminium Matrix Composites (AMC) is attracted in the emerging world because of its low cost, less weight and enhanced mechanical properties. In the present study the enhancement in mechanical properties like hardness and tensile strength of AMCs by reinforcing AA 6061 matrix with silicon carbide (SiC) and boron carbide (B4C) particles are analyzed. By enhanced stir casting method aluminium matrix was reinforced with boron carbide particulates and silicon carbide particulates with the various weight percentage of 2.5 %,5% and 7.5%.The tensile strength and hardness was found to increase with the increase in wt% of the reinforcement. From the analysis it is observed that the mechanical property of B4C reinforced AMC is significantly good compared to SiC reinforced AMC.

Microstructural and Mechanical Behaviour of Aluminium Matrix Composites Reinforced with Coated SiC Particles Fabricated by Stir Casting

2015 ◽  
Vol 766-767 ◽  
pp. 301-307 ◽  
Author(s):  
S. Dhanalakshmi ◽  
M. Jaivignesh ◽  
A. Suresh Babu ◽  
K. Shanmuga Sundaram
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Tensile Strength ◽  
Impact Strength ◽  
Aluminium Alloy ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Base Alloy ◽  
Stir Casting ◽  
Matrix Composites

Metal matrix composites are the resultant of combination of two or more elements or compounds, possessing enhanced characteristics than the individual constituents present in them. This paper deals with the fabrication of Al 2014-SiC composite and investigation of its Microstructure and Mechanical properties. 2014 Aluminium alloy is characterized by good hardness. It is selected as the base metal. The Silicon Carbide is characterized by good strength and low density (3.21 g/cm3). It is chosen as the reinforcement. Silicon Carbide is coated with Nickel by electroless method to increase its wettability and binding properties. The fabrication of metal matrix composites is done by stir casting in a furnace, by introducing the required quantities of reinforcement into molten Aluminium alloy. The reinforcement and alloy is mixed by means of stirring, with the help of a stirrer. The base alloy and the composites are then tested for mechanical properties such as tensile strength, flexural strength, impact strength and hardness. The fabricated samples have higher tensile strength and impact strength than the alloy. Microstructure of the samples, are analyzed using optical microscope.

scholarly journals Characterization of Aluminium Hybrid Metal Matrix Composites

2021 ◽  
Author(s):  
Siddharth Srivast ◽  
Vansh Malik ◽  
Mudit K. Bhatnagar ◽  
Neeraj Verma ◽  
Mamatha T G ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Hardness Test ◽  
Future Research ◽  
Alumina Powder ◽  
Material Research ◽  
Matrix Composites ◽  
Hybrid Metal Matrix Composites

Abstract Hybrid Metal Matrix composites have emerged as an epicentre of material research due to their vast applications and a wide array of reinforcement combinations. In this experiment, a hybrid Aluminum metal matrix composite has been fabricated by the double (two steps) stir casting method. The present study evaluates the mechanical properties of AA6061 in varying concentrations of silicon carbide with 5, 10, 15 and 20 weight percent (wt.%), in addition to Rice Husk Ash, Tungsten Carbide and Alumina Powder which are in a fixed quantity. Mechanical properties have been evaluated by conducting an Impact test, Hardness test, Flexural test and Tensile Strength. In addition, micrograph Images have been incorporated for analysing the microstructural characteristics of the Hybrid AMMC. It was observed that MMC properties such as Tensile Strength, Yield Strength, Hardness, Impact Strength were highest at 20 wt.% SiC. Hence, it was inferred that 20wt% SiC was an appropriate concentration for applications in automobile and aerospace pertaining to its augmented mechanical properties. In conclusion, prospects of future research are also explored.

Tribological and Mechanical Behaviour of Hybrid Al 6061 Metal Matrix Composites

2021 ◽  
Vol 13 (3) ◽  
Author(s):  
T. Raja ◽  
A. Rajasekar ◽  
Arvind Menon ◽  
V. Dineshkumar ◽  
M. Jayakumar
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Damping Capacity ◽  
Matrix Composites ◽  
Reinforced Composites ◽  
Weight Percentage ◽  
Specific Strength ◽  
The Matrix

Metal matrix composites (MMCs) possess significantly improved properties including high specific strength, specific modulus, damping capacity and good wear resistance compared to unreinforced alloys. The metal matrix choices for Al6061 matrix were silicon carbide (SiC), magnesium oxide (MgO) in constant proportions with either zirconium dioxide (ZrO2) or alumina (Al2O3) as the reinforcements. The stir casted samples were tested for their tensile strength, impact strength and wear. The results confirmed that stir formed Al6061 with Al2O3, MgO, SiC, ZrO2 reinforced composites is clearly superior to base Al6061. It is found that elongation tends to decrease with increasing particles weight percentage, which confirms that alumina and ZrO2 addition increases brittleness. It appears from this study that ultimate tensile strength and yield strength trend to increase with an increase in weight percentage of the reinforcements in the matrix. Impact strength is increased by adding Al2O3 and MgO, SiC, ZrO2.

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