Morphological and Mechanical Characteristics of Hybrid Aluminium Matrix Composites

2019 ◽  
Vol 11 (2) ◽  
Author(s):  
R. Pugazhenthi ◽  
S. Sivaganesan ◽  
C. Dhansekaran ◽  
A. Parthiban
Keyword(s):  
Tensile Strength ◽  
Smart Materials ◽  
Aluminium Alloys ◽  
Testing Machine ◽  
Morphological Characteristics ◽  
Stir Casting ◽  
Matrix Composites ◽  
Tensile Testing Machine ◽  
Hardness Tester ◽  
Silicon Carbide Particles

In emerging trend day by day the world facing lot of new invention in automobiles and aerospace industries. They need new smart materials lighter in weight, tensile strength and hardness with good thermal shock resistance compared to available conventional metals. Especially the aluminium based Metal Matrix Composite (MMC) materials can provide these properties. In this research article an attempt is made to find the mechanical properties and morphological of the aluminium alloys of Al 356 mixed with silicon carbide particles (SiCp) and Mica. All these three different MMCs were fabricated in stir casting method. Their tensile strengths are studied and compared with the help of Vickers micro hardness tester and tensile testing machine. The morphological characteristics are tested and compared with the Scanning Electron Microscope (SEM) and Energy Dispersive X-ray Spectroscopy (EDAX) optical microscopy. The tensile strength and hardness of MMCs were comparatively increased than the aluminium alloys.

scholarly journals Comparison of mechanical and wearing properties between LM13 matrix and Stir cast LM13/B4C/Gr hybrid composites of various composition

2017 ◽  
Vol 7 (1.1) ◽  
pp. 193
Author(s):  
M.H. Faisal ◽  
S. Prabagaran ◽  
T.S. Vishnu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Boron Carbide ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Testing Machine ◽  
Matrix Composites ◽  
Hardness Tester ◽  
Negative Effect ◽  
Carbide Particles

Aluminium/graphite composites are the need of modern times for addressing the fuel saving issues. The graphite in such composites act as solid lubricant and it reduce external fuel requirements. But such composites are having degraded mechanical properties due to the graphite content in composite. In order to solve the negative effect of graphite on mechanical properties of LM13/Gr self-lubricating composite this study was conducted to find out the mechanical properties of LM13/B4C/Gr Metal Matrix Composites. Boron carbide was selected as reinforcement because of its better reinforcement properties compared to alumina and silicon carbide. The properties of the hybrid composites were compared with the LM13/Gr self-lubricating composite to study the enhancement in mechanical properties that has been caused by the boron carbide particles. Using computerized universal testing machine and rock-well hardness tester mechanical properties such as hardness and tensile strength were tested. Pin on disk testing machine was used to analyse the wear behavior. The test results indicates that by raising weight % of boron carbide particles in the LM13, tensile strength and hardness of the hybrid composites was increased compared to self-lubricating composite accompanied by better tribological properties.

scholarly journals Effect of bagasse ash reinforcement on Al356 matrix composite manufactured by two stage stir casting process

2018 ◽  
Vol 8 (04) ◽  
Author(s):  
Vaibhav Dardare ◽  
S. G. Kulkarni
Keyword(s):  
Tensile Strength ◽  
Compression Strength ◽  
Testing Machine ◽  
Casting Process ◽  
Stir Casting ◽  
Experimental Result ◽  
Compression Tests ◽  
Two Stage ◽  
Weight Percentage ◽  
Hardness Tester

In the present work Al356-Bagasse ash composites are produced by two stage stir casting method and subsequently various properties like compression strength, tensile strength, hardness of Al356 are studied. Al356 alloy is reinforced with bagasse ash particles of the various weight percentage (2,4 and 6% wt.). An experimental result shows uniform distribution of the bagasse ash particles in the matrix of the Al356 leading to increase in the mechanical strength of the composites. The tensile and compression tests are carried out with the help of Universal Testing Machine and it was observed that ultimate tensile strength, yield strength and compression strength increases with increase weight percentage of bagasse ash in the composite, while percentage elongation decreases. The hardness of the composites are measured by brinell hardness tester and it was observed that hardness of the composite material increases with increase in weight percentage of bagasse ash particles.

Effect of silver nanoparticle (AgNp) mixed with calcium carbonate on impact, hardness and tensile strength properties of aluminium 6063

2020 ◽  
pp. 002199832092314
Author(s):  
Adefemi Adeodu ◽  
Lateef Mudashiru ◽  
Ilesanmi Daniyan ◽  
Abdulmalik Awodoyin
Keyword(s):  
Tensile Strength ◽  
Calcium Carbonate ◽  
Aluminium Alloy ◽  
Testing Machine ◽  
Charpy Impact ◽  
Stir Casting ◽  
Optical Microscope ◽  
Tensile Testing Machine ◽  
Casting Technique ◽  
The Impact

Mechanical properties (impact, hardness and tensile strength) characterization of samples containing homogenous mixtures of Al 6063 matrix and varying amount of silver nanoparticles mixed with calcium carbonate at 2, 4, 6% weight fractions, respectively, produced by method of stir casting were carried out. Measurement of impact energy, hardness and tensile strength of the produced samples at 24℃ (ambient) temperature was done by Charpy impact, Brinell hardness and universal tensile testing machine in accordance to ASTM E23, E384 and E8/E8M-13M, respectively. The magnitude of impact and hardness increased evidently with increase in percentage weight fraction of the AgNPs. The refined samples were examined under an optical microscope. The fracture surfaces of the impact test samples were further examined by scanning electron microscopy. There is an increase in tensile strength, elongation and modulus of elasticity of Al-AgNP composites compared to as-cast aluminium alloy. The use of stir-casting technique influences the homogeneity and microstructure of the composites positively. It is concluded that Al-silver nanocomposites possess better qualities in hardness and strength and can replace conventional aluminium alloy in terms of performance and longer life in industrial application.

Al2O3/Al Composites Consolidated from Alumina and Aluminum Particulates by Reciprocating Extrusion

2011 ◽  
Vol 311-313 ◽  
pp. 63-67
Author(s):  
Zhong Ming Zhang ◽  
Bo Hu ◽  
Feng Tao Gao ◽  
Jin Cheng Wang
Keyword(s):  
Tensile Strength ◽  
Volume Fraction ◽  
Pure Aluminum ◽  
Testing Machine ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Extrusion Process ◽  
Hardness Tester ◽  
Alumina Particles ◽  
Reciprocating Extrusion

MMCs can be usually fabricated by powder metallurgy, stir casting and spray co-deposition, etc. Al2O3/Al composites were produced by means of reciprocating extrusion with alumina and pure aluminum particulates in the present study. The microstructure was analyzed by scanning electronic microscope, and the mechanical properties were measured by hardness tester and universal testing machine, respectively. The results showed that Al2O3/Al composites with as high as 20 vol.% alumina can be successfully produced by reciprocating extrusion. During reciprocating extrusion process, the reinforced alumina particles can be fragmentized and uniformly distributed in the aluminum matrix. The tensile strength and hardness of the composites increase as volume fraction of alumina particles increases, whereas the elongation decreases. Compared with the pure aluminum compact, the tensile strength and hardness of the composite with 20 vol.% alumina particles is 29.3% and 93.5% higher, respectively; whereas the elongation decreases 66.6%, and the fracture mechanism of the composites is attributed to ductile rupture.

Synthesis and Characteristic of AA6061/SiC Sand Cast Composite

2014 ◽  
Vol 591 ◽  
pp. 43-46
Author(s):  
M. Selvakumar ◽  
G.P. Rajamani ◽  
K. Kalaiselvan
Keyword(s):  
Testing Machine ◽  
Aluminum Matrix ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Tensile Testing Machine ◽  
Sand Cast ◽  
Weight Percentage ◽  
Hardness Tester ◽  
The Matrix

The present work focuses on the fabrication of aluminum (6061-T6) matrix composites (AMCs) reinforced with various weight percentages of SiC particulates using sand casting method. The addition of Mg in the melt during the process has improved the wettability between Al and SiC there by reduced the formation of SiO2 layer on the surface. The fabricated AMCs were characterized using optical microscopy (OM), scanning electron microscopy (SEM), hardness tester and universal tensile testing machine. The OM and SEM images revealed the presence of homogeneous dispersion of SiC particle in the matrix. Using X-ray diffraction (XRD) test, the dispersion of reinforcement has been identified. With the increases in weight percentage of SiC particles in the aluminum matrix improved the mechanical properties of composites.

scholarly journals Microstructures and Mechanical Properties of Cu-Coated SiC Particles Reinforced AZ61 Alloy Composites

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 820 ◽  
Author(s):  
Cuige Dong ◽  
Richu Wang ◽  
Suqing Guo
Keyword(s):  
Tensile Strength ◽  
Reduction Method ◽  
Direct Reduction ◽  
Energy Dispersive Spectrometer ◽  
Testing Machine ◽  
Hot Extrusion ◽  
Optical Microscope ◽  
Hardness Tester ◽  
Silicon Carbide Particles ◽  
Pure Cu

The pure Cu coating was plated on the surface of silicon carbide particles (SiCP) by two different methods, hydrazine hydrate direct reduction method and hydrazine with glucose pre-reduction method. The hydrazine with glucose pre-reduction method is more suitable for Cu plating on the surface of SiCP in terms of morphology and microstructure. AZ61 composites reinforced with different volume fractions (3~15%) uncoated and Cu-coated SiCP were prepared by powder metallurgy followed by hot extrusion. The effect of Cu coating on the morphology of SiCP/AZ61 composite was analyzed by optical microscope (OM), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), electronic probe micro-analyzer (EPMA) and X-ray diffractometer (XRD). The properties of the composite were characterized by Brinell hardness tester and mechanical testing machine. The effects of Cu coating on the micro-hardness, tensile strength and elongation of SiCP/AZ61 composite were analyzed. The tensile strength of AZ61 composite reinforced with Cu-coated SiCP increased by 3.5~6.3% and the elongation increased by 7.4~35.0% compared with AZ61 composite reinforced with uncoated SiCP. Therefore, the Cu coating can ameliorate the microstructure and properties of the SiCP/AZ61 composite effectively, reduce the defect rate in the composite, and improve the hardness, relative density, tensile strength, elongation of the composite.

scholarly journals Effect of Welding Wires Containing ZrB2 Particles on Microstructure and Mechanical Properties of Spray-Formed 7055 Aluminum Alloy TIG Welded Joints

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Ting Huang ◽  
Junhua Xu ◽  
Lihua Yu ◽  
Yunxuan Hu ◽  
Yun Cheng ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Welded Joints ◽  
Welded Joint ◽  
Testing Machine ◽  
Weld Zone ◽  
Tensile Testing Machine ◽  
Hardness Tester ◽  
7055 Aluminum Alloy

In this paper, a series of welding wires with ZrB2 particles were developed by the in situ reaction, and the ZrB2 particles were successfully introduced into the spray-formed 7055 aluminum alloy welded joints by TIG welding. The microstructure, hardness, and tensile strength of the welded joints were tested by metallographic microscope, SEM, EDS, Vickers hardness tester, and tensile testing machine. The results show that the microstructure of ZrB2/7055 welded joints is fine dendrites. The hardness of the weld zone of the ZrB2/7055 welded joint is higher than that of the 7055 welded joint. With the increase of ZrB2 particles’ content, the tensile strength of welded joints increases first and then decreases. When the content of ZrB2 particles is 1.5 wt.%, the tensile strength reaches the maximum value of 280 MPa. The tensile strength of the welded joint containing 1.5 wt.% ZrB2 particles is 14% higher than that of the pure 7055 aluminum alloy welded joint.

Research of the Mechanical Properties of the Filament from the Percentage of Filling when Prototyping Machine Parts

2021 ◽  
Vol 410 ◽  
pp. 617-623
Author(s):  
Elena N. Gryadynova ◽  
Andrey V. Gorin ◽  
Alexey Yu. Rodichev
Keyword(s):  
Tensile Strength ◽  
Tensile Testing ◽  
Testing Machine ◽  
Experimental Studies ◽  
Relative Deformation ◽  
Strain Diagram ◽  
Experimental Sample ◽  
Tensile Testing Machine ◽  
Machine Parts ◽  
Fisher’S Criterion

The article contains the analysis of thermoplastics used in prototyping machine parts. We used several types of experimental samples with different filling percentages. The equipment on which the experimental studies were carried out is shown. During the experiment, a specialized tensile testing machine was used. The experimental samples were installed in the developed centering device. Normal conditions were observed during the tests. The results of an experimental tensile study of PLA-plastic specimens are presented. The typical stress-strain diagram of an experimental sample is described, which describes the dependence of stress on relative deformation. An equation of the linear dependence of the tensile strength on the percentage of filament filling has been compiled, which makes it possible to determine the tensile strength of the product at any percentage of the filling of the plastic filament. The assessment is adequately verified by Fisher's criterion. Recommendations for filament filling in prototyping machine parts are given.

Contriving and Assessment of Magnesium Alloy Composites Augmented with Boron Carbide VIA Liquid Metallurgy Route

2022 ◽  
Vol 1048 ◽  
pp. 3-8
Author(s):  
J. Allen Jeffrey ◽  
S. Suresh Kumar ◽  
V. Anusha Roseline ◽  
A. Lazar Mary ◽  
D. Santhosh
Keyword(s):  
Boron Carbide ◽  
Testing Machine ◽  
High Strength ◽  
Stir Casting ◽  
Vital Role ◽  
Magnesium Metal ◽  
Hardness Tester ◽  
Universal Testing ◽  
Modern Engineering

In modern engineering low-density composites plays a vital role of which magnesium alloys are very effective due to its high strength with better corrosion resistance and neat cast ability. In this work a micron sized Boron carbide ceramic (B4C) of about 100 microns is diffused as a reinforcement with AZ91 for preparing a magnesium metal matrix composite (MMMC) through stir casting route. A modified pit furnace setup is used for doing stir casting with varying volume fractions of 0％ and 3% of boron carbide for doing the composites. Furthermore mechanical and metallurgical properties like Tensile test is made through universal testing machine, Micro-hardness through Vickers hardness tester and Micro structure through Optical Microscopy is done for investigation.

scholarly journals The Effect of Immersion Time of Coconut Fiber in Limestone Water on Tensile Strength and Surface Morphology

2020 ◽  
Vol 55 (3) ◽  
Author(s):  
Sutrisno ◽  
Rudy Soenoko ◽  
Yudy Surya Irawan ◽  
Teguh Dwi Widodo
Keyword(s):  
Tensile Strength ◽  
Surface Morphology ◽  
Mass Fraction ◽  
Immersion Time ◽  
Testing Machine ◽  
Coconut Fiber ◽  
Tensile Testing Machine ◽  
X Ray ◽  
Coir Fibers ◽  
Infrared Spectrometer

This study aims to identify the effect of immersion of coconut fiber in limestone water on surface morphology and tensile strength, including chemical reactions during immersion. Coconut coir fibers were immersed in a solution of limestone water for 0, 4, 8, 12, 16, and 20 hours, with a mass fraction of limestone of 5%, then dried for 1 hour. Coconut fiber was characterized by a single fiber tensile testing machine, Scanning Electron Microscope, X-ray diffractometer, and Fourier transform infrared spectrometer. The results showed that the percentage of 5% with 8 hours of immersion in the fiber had a cleaner surface morphology with a tensile strength of 234.62 MPa. Therefore, as an alternative to improving the characteristics of a single thread, immersion in limestone water needs to be applied.

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