Evaluation of the mechanical and tribological characteristics of AA6061/TiB2 metal matrix composite and parametric optimisation of its casting process by using Taguchi technique and NSGA-II

AbstractIn this paper, an inert gas assisted electromagnetic stir casting process is adapted for manufacturing a cast hybrid metal matrix composite (MMC) using Al2O3 and SiC particulates as a hard phase reinforcement in Al 7075 alloy metal matrix. Four different samples containing 5, 10, 15 and 20 wt% of Al2O3 and SiC with Al 7075 alloy composites were fabricated. The characterizations for all the samples were carried out through optical microstructure, scanning electron microscopy (SEM) fractograph, X-ray diffraction (XRD) analysis, differential thermal analysis (DTA) analysis and mechanical properties. The results revealed that the particles are uniformly distributed in the matrix. No peaks of Al4C3 were found. There is negligible loss of material in the composite. The tensile strength and microhardness of the hybrid composite are higher by 65.7% and 13.5%, respectively, when compared to its cast metal matrix Al 7075 alloy.

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The Mechanical Characterization of Al2O3 Reinforced AL6061 Metal Matrix Composite

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.766-767.257 ◽

2015 ◽

Vol 766-767 ◽

pp. 257-262

Author(s):

P. Mohan ◽

M. Kathirvel ◽

N. Azhagesan ◽

M. Sivapragash

Keyword(s):

Fracture Toughness ◽

Metal Matrix Composite ◽

Matrix Composite ◽

Material Characterization ◽

Metal Matrix ◽

Treatment Process ◽

Mechanical Characterization ◽

Casting Process ◽

Stir Casting

The aluminium based composites are increasingly being used in the transport, aerospace, marine, automobile and mineral processing industries. The widely used reinforcing materials for these composites are silicon carbide, aluminium oxide and graphite in the form of particles or whiskers. In this study Al6061-6 & 4wt% Al2O3 based metal matrix composite were produced by mechanical stir casting process. The obtained cast metal matrix composite is carefully machined to prepare the test specimens for hardness, tensile as well as fracture toughness studies as per ASTM standards. The hardness, tensile strength and fracture toughness properties of Al6061-Al2O3 composites are explored experimentally. Finally compare the material characterization with heat treatment process sample and compare the fracture toughness of sample with mathematical approach, experimental and finite element method.

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Investigative Analysis of the Tensile and Impact Strengths of Hybridized Aluminum Metal Matrix Composite Materials

Journal of Scientific Research and Reports ◽

10.9734/jsrr/2020/v26i330238 ◽

2020 ◽

pp. 72-79

Author(s):

K. E. Madu ◽

E. I. Nwankwo ◽

G. O. Okoronkwo ◽

J. I. Onyewudiala

Keyword(s):

Composite Materials ◽

Impact Strength ◽

Metal Matrix Composite ◽

Matrix Composite ◽

Metal Matrix ◽

Chemical Properties ◽

Aluminium Oxide ◽

Casting Process ◽

Strength Properties ◽

Material Technology

New developments in material technology aids in the investigations, reinforcements of new materials which replaces existing materials for various applications. Among those, composite materials play an important role which is a combination of two or more materials with different physical and chemical properties. This research focused on developing an aluminium metal matrix composite (AMMC) material made by wrought aluminium alloy with various weight fractions of aluminium oxide to make five different forms of composites. In this research stir casting process was used. The reinforced composites were tested for their tensile and impact strength properties. The results show that composite with a higher percentage of aluminium oxide has high tensile and impact strength properties than other composites.

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Static and Dynamic Analysis of Aircraft Wing Made by LM 25 and ALSiC Metal Matrix Composite

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.f1231.0986s319 ◽

2019 ◽

Vol 8 (6S3) ◽

pp. 1319-1323

Keyword(s):

Silicon Carbide ◽

Composite Material ◽

Metal Matrix Composite ◽

Matrix Composite ◽

Material Properties ◽

Metal Matrix ◽

Hardness Test ◽

Casting Process ◽

Aircraft Wing ◽

Static And Dynamic Analysis

This paper discusses about the weight reduction in the wing structure that improves the productivity and performance of an aircraft wing. Decrease in the mass of the wings has higher significance compared all other air craft parts Aircraft wing structures are analyzed with LM25 and a metal matrix composite material which is a mix of LM25 and Silicon Carbide (SiC) where in aluminum is the base metal and silicon carbide is added in different weight proportions. By varying silicon carbide percentage in LM25 four types of samples are prepared utilizing stir casting process. The young's modulus, Poisson's ratio and thickness of every sample are determined cautiously by exposing the sample to tensile test and hardness test. By looking at the material properties acquired tentatively ideal level of silicon carbide in aluminum is found. Static basic investigation is completed in ANSYS by contributing the properties of the ideal example which are acquired tentatively. The outcomes acquired from ANSYS for pure AL25 and metal matrix composite (SiC) are compared. By looking at the outcomes it is discovered that composite material has preferred material properties and stresses over LM25.

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Experimental Evaluation of Mechanical, Wear and Corrosion properties of AA5083/Graphite Metal Matrix Composite Prepared using Compocasting Process

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

10.35940/ijitee.a5247.119119 ◽

2019 ◽

Vol 9 (1) ◽

pp. 2352-2357

Keyword(s):

Tensile Strength ◽

Metal Matrix Composite ◽

Matrix Composite ◽

Metal Matrix ◽

Matrix Material ◽

Research Work ◽

Casting Process ◽

Stir Casting ◽

Corrosion Properties ◽

Mechanical And Tribological Properties

In most of the engineering applications such as aviation, defence, marine and automotive requires components with light weight and along with favorable mechanical properties; this demand perhaps satisfied by metal matrix composites (MMCs) of aluminium by virtue of its distinguished achievement. Also MMCs suffer from insufficient process stability, in-adequate economic efficiency and reliability. In the present research work an experiment was developed to synthesize metal matrix composite adopting Aluminium Alloy (AA) 5083 as matrix material reinforced with graphite particulates (6 wt %, 8 wt % & 10 wt %) using two stage in-situ stir casting process. Experiments were implemented to analyze mechanical and tribological properties like ultimate tensile strength, microhardness, wear characteristics and corrosion properties. From the above investigations, it is revealed that microhardness increases with decrease in tensile strength with upsurge in more wt % of reinforcement. Due to the very high self-lubricating property of graphite significant reduction in wear can be observed with deepen in wt % of graphite. Also corrosion rate decreases with more amount of graphite particulate when compared with base matrix material.

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