Comparative Study on Microstructural Characteristics and Compression Deformation Behaviour of Alumina and Cenosphere Reinforced Aluminum Syntactic Foam Made Through Stir Casting Technique

Hollow Glass Microspheres (HGM) in the range of 10–20 vol. % were used as space holders for making syntactic aluminum foam having density 2.28–2.49 gm/cc using stir-casting technique. Aluminium alloys have already established their exceptional ability to sketch out the material for required properties. Aluminium alloy and its composites are one of the widely used materials for aeronautics and marine applications where high strength is expected from a low density material. So, an effort is made to enhance this lightness of aluminium alloy LM13 without affecting its strength by reinforcing it with Hollow Glass Microspheres (HGM). This synthesized syntactic foam, was characterized in terms of density and compressive deformation behaviour. It was noted that the syntactic foam behaves like a high strength aluminium foam under compressive deformation exhibiting flat plateau region in the stress–strain curves. The plateau stress of syntactic foam decreases with Hollow Glass Microspheres volume fraction vis-à-vis porosity.

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Studies on mechanical property and wear behaviour of AA7075 hybrid composites prepared by a conventional casting method

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering ◽

10.1177/09544089211034939 ◽

2021 ◽

pp. 095440892110349

Author(s):

V Vignesh Kumar ◽

K Raja ◽

T Ramkumar ◽

M Selvakumar ◽

TS Senthil Kumar

Keyword(s):

Boron Nitride ◽

Boron Carbide ◽

Hybrid Composites ◽

Stir Casting ◽

Wear Behaviour ◽

Tensile Behaviour ◽

Wear Properties ◽

Casting Technique ◽

Reciprocating Wear ◽

Sliding Distance

The research article addresses the reciprocating wear behaviour of hybrid AA7075 reinforced with boron carbide and boron nitride through a stir-casting technique. The experiment involved varying wt.% of the secondary particle boron carbide (3, 6 and 9) while boron nitride (3) was kept as constant. The hybrid composites were characterised using scanning electron microscopy coupled with energy dispersive spectroscopy. The hardness and tensile behaviour of the hybrid composites were evaluated. Reciprocating wear behaviour of the hybrid composites were examined using a tribometer by varying the wear parameters such as load and sliding distance. The results revealed that AA7075/6boron carbide/3boron nitride had better hardness, tensile and wear properties. The surface morphology of the wear samples was analysed using SEM.

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Mechanical characterization of LM25 alloy matrix composite reinforced with boron carbide

Journal of Composite Materials ◽

10.1177/00219983211005513 ◽

2021 ◽

pp. 002199832110055

Author(s):

Zeeshan Ahmad ◽

Sabah Khan

Keyword(s):

Tensile Strength ◽

Boron Carbide ◽

Mechanical Characterization ◽

Stir Casting ◽

Surface Mapping ◽

Alloy Matrix ◽

Casting Technique ◽

The Matrix ◽

Carbide Particles

Alumnium alloy LM 25 based composites reinforced with boron carbide at different weight fractions of 4%, 8%, and 12% were fabricated by stir casting technique. The microstructures and morphology of the fabricated composites were studied by scanning electron microscopy and energy dispersive spectroscopy. Elemental mapping of all fabricated composites were done to demonstrate the elements present in the matrix and fabricated composites. The results of microstructural analyses reveal homogenous dispersion of reinforcement particles in the matrix with some little amount of clustering found in composites reinforced with 12% wt. of boron carbide. The mechanical characterization is done for both alloy LM 25 and all fabricated composites based on hardness and tensile strength. The hardness increased from 13.6% to 21.31% and tensile strength 6.4% to 22.8% as reinforcement percentage of boron carbide particles increased from 0% to 12% wt. A fractured surface mapping was also done for all composites.

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An Investigation of Mechanical Properties on Aluminium 6061 Reinforced with Silicon Carbide - Metal Matrix Composites

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.787.568 ◽

2015 ◽

Vol 787 ◽

pp. 568-572 ◽

Cited By ~ 2

Author(s):

A. Radha ◽

K.R. Vijayakumar

Keyword(s):

Mechanical Properties ◽

Silicon Carbide ◽

Metal Matrix ◽

Charpy Impact ◽

Vortex Method ◽

Weight Fraction ◽

Stir Casting ◽

Matrix Composites ◽

Casting Technique ◽

High Fatigue

Composite materials like Aluminium metal matrix composite is playing a very important role in manufacturing industries e.g. automobile and aerospace industries, due to their superior properties such as light weight, low density, high specific modulus, high fatigue strength etc., In this study Aluminium(Al 6061) is reinforced with Silicon Carbide particles and fabricated by Stir Casting Technique (vortex method). The MMC rectangular bars (samples) are prepared with Al6061 and SiC (28 µ size) as the reinforced particles by weight fraction from 0%, 5%, 10%, and 15% of SiC. The microstructure analysis and Mechanical properties like Tensile Strength, Vickers Hardness and Charpy Impact Strength were investigated on prepared specimens. It is observed that the properties are increased with increasing of reinforced specimens by weight fraction.

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Development of copper based composite by stir casting technique

Materials Today Proceedings ◽

10.1016/j.matpr.2019.07.669 ◽

2020 ◽

Vol 25 ◽

pp. 649-653

Author(s):

Pradeep Yadav ◽

Shashi Prakash Dwivedi ◽

Md. Shahnawaz ◽

Arpit Singh ◽

Jaypee Yadav

Keyword(s):

Stir Casting ◽

Casting Technique

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Hot compression behaviour and microstructural evolution in aluminium based composites: an assessment of the role of reinforcements and deformation parameters

Manufacturing Review ◽

10.1051/mfreview/2021004 ◽

2021 ◽

Vol 8 ◽

pp. 6

Author(s):

Saheed Adeoye Babalola ◽

Kenneth Kanayo Alaneme ◽

Samuel Ranti Oke ◽

Lesley Heath Chown ◽

Nthabiseng Beauty Maledi ◽

...

Keyword(s):

Silicon Carbide ◽

Matrix Composite ◽

Stir Casting ◽

Hot Compression ◽

Compression Testing ◽

Aluminium Matrix ◽

Aluminium Matrix Composite ◽

Casting Technique ◽

Deformation Parameters ◽

Dynamic Recrystallisation

The response of two different types of aluminium matrix composites (AMCs) reinforced with silicon carbide ceramic particulates or nickel metallic particulates to hot compression testing parameters was evaluated. The composites were produced via two-step stir-casting technique. Axisymmetric compression testing was performed on the samples at different deformation temperatures of 220 and 370 °Ϲ, 0.5 and 5 s−1 strain rates and total strains of 0.6 and 1.2. The initial and post-deformed microstructures were studied using optical and scanning electron microscopy. The results show that flow stress was significantly influenced by imposed deformation parameters and the type of reinforcements used in the AMCs. Nickel particulate reinforced aluminium matrix composite (AMC) showed superior resistance to deformation in comparison with silicon carbide reinforced AMC under the different testing conditions. In both AMCs, work hardening, dynamic recovery and dynamic recrystallisation influenced their response to imposed parameters. The signature of dynamic recrystallisation was very apparent in aluminium matrix composite reinforced with nickel particulates.

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Preparation and Microstructure Characteristics of Aluminium 6061 Alloy Based Metal Matrix Composite

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.b1214.1292s419 ◽

2019 ◽

Vol 9 (2S4) ◽

pp. 465-468

Keyword(s):

Metallic Matrix ◽

Weight Fraction ◽

Stir Casting ◽

Scientific Discipline ◽

Carbide Powder ◽

Matrix Composites ◽

Metallic Matrix Composites ◽

Casting Technique ◽

Special Weight

The role of engineering substances within the improvement of cutting-edge era like metallic Matrix Composites (MMCs) have evoked a eager hobby nowadays for capacity programs in aerospace and car industries as a result of their advanced power. Aluminium (6061) and Boron Carbide (Powder) is chosen for reinforcement material and matrix respectively. Al–B4C composites containing special weight probabilities 3.5 %, 7.0% and 10.5% of B4C have been fabricated by way of stir casting Technique. Experiments are conducted with the aid of various weight fraction of B4C (3.5%, 7.0% and 10.5%), at the same time as maintaining all other parameters regular. The compositions of their small structural options are determined through scientific discipline magnifier..

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Microstructure, Tensile Properties and Hardness Behavior of Al7075 Matrix Composites Reinforced With Graphene Nanoplatelets and Beryl Fabricated by Stir Casting Method

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.a2974.109119 ◽

2019 ◽

Vol 9 (1) ◽

pp. 6761-6765 ◽

Cited By ~ 1

Keyword(s):

Tensile Strength ◽

Volume Fraction ◽

Hybrid Composites ◽

Matrix Material ◽

Stir Casting ◽

Hybrid Nanocomposites ◽

Homogeneous Distribution ◽

Casting Technique ◽

Aluminum 7075 ◽

Scanning Electron

In this research, an effort is made to familiarize and best potentials of the reinforcing agent in aluminum 7075 matrices with naturally occurring Beryl (Be) and Graphene (Gr) to develop a new hybrid composite material. A stir casting technique was adopted to synthesize the hybrid nanocomposites. GNPS were added in volume fractions of 0.5wt%, 1wt%, 1.5wt%, and 2wt% and with a fixed volume fraction of 6 wt.% of Beryl. As cast hybrid composites were microstructurally characterized with scanning electron microscopy and X-ray diffraction. Microstructure study through scanning electron microscope demonstrated that the homogeneous distribution reinforcement Beryl and GNPs into the Al7075 matrix. Brinell hardness and tensile strength of synthesized materials were investigated. The hybrid Al7075-Beryl-GNPs composites showed better mechanical properties compared with base Al7075 matrix material. The ascast Al7075-6wt.% Beryl-2wt.%GNPs showed 49.41% improvement in hardness and 77.09% enhancement in ultimate tensile strength over Al7075 alloy.

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