Copper Effect on Mechanical Properties of Al-CNF Composite Material Elaborated by Liquid Metallurgy with Induction Melting

2018 ◽  
Vol 941 ◽  
pp. 2018-2023
Author(s):  
Paul Royes ◽  
Nicolas Masquelier ◽  
Thierry Breville ◽  
David Balloy
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Carbon Nanofibers ◽  
Aluminum Matrix ◽  
Casting Process ◽  
Stir Casting ◽  
Aluminum Matrix Composite ◽  
Strength Increase ◽  
Induction Melting ◽  
Coated Carbon

Aluminum-Carbon nanoFibers (CNF) composites produce by stir casting process present a yield strengths (YS) and an ultimate tensile strength (UTS) improved up to 33%. The hardening of the Al-CNF composite was considered as the sum of elementary contributions of effects: natural hardness of pure Al; grain size; dislocation density; elements in solid solution; CNF. In order to quantify CNF effect, calculation was performed to quantify the contribution to yield strength of each other’s mechanisms. This theoretical calculation was compared to experimental results and the real effect of CNF on yield strength increase was estimated between 10 and 16%. Figure SEQ Figure \* ARABIC 1: Graphical Abstract (copper dots on CNF / stir casting process / contributions to hardening) Keywords: Aluminum matrix composite; copper-coated carbon nanofibers; liquid metallurgy elaboration; mechanical properties; hardening effect

scholarly journals Study on Properties of Multi Walled Carbon Nanotube Reinforced Aluminum Matrix Composite through Casting Technique

2021 ◽  
Vol 18 (1) ◽  
pp. 97-101
Author(s):  
Shuib Pasha S A ◽  
Nayeem Ahmed M ◽  
Tilak S R ◽  
Anil Kumar B N
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Matrix Composite ◽  
Research Work ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Optical Microscope ◽  
Aluminum Matrix Composite ◽  
Casting Technique ◽  
Multi Walled Carbon Nanotubes

Composite materials are defined as material systems consisting of mixture of or combination of two or more micro constituents insoluble in each other and differing in form and or material composition. In this study Metal Matrix Composite (MMCs) has been produced using stir casting method for performing the mechanical properties. Most of the engineering industries want light and better mechanical properties of components; this can be achieved by MMCs of Aluminium because of its excellent performance. In this research work we fabricate the Aluminium by liquid route. Here Al 7075 is used as a base metal and Multi Walled Carbon Nanotubes (MWCNT) used as sub metal with various percentages. Experiments were conducted to analyze microstructure, hardness & tensile strength. By using optical microscope and Scanning Electron Microscope (SEM) we analyze the sample specimens are well dispersion in MWCNT with AA 7075. Hardness and tensile strength increases with increasing of wt. %. Hardness of material increases with increase in percentages of MWCNT, whereas tensile strength of the material increases with increase in percentages of MWCNT and Elongation reduces

scholarly journals ADDITION OF MAGNESIUM (Mg) WITH ALUMINA (AL2O3) REINFORCER IN ALUMINUM MATERIAL COMPOSITES ON THE MECHANICAL PROPERTIES AND MICRO STRUCTURES

2021 ◽  
Vol 2 (2) ◽  
pp. 7-13
Author(s):  
Basuki Widodo ◽  
Agung Panji Sasmito
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Matrix Composite ◽  
Volume Fraction ◽  
Aluminum Matrix ◽  
Casting Process ◽  
Magnesium Content ◽  
Aluminum Matrix Composite ◽  
Aluminum Matrix Composites ◽  
Low Density

Aluminum is a widely used and applied material in daily life or in the industrial and automotive world. In order to improve the performance and properties of the application to be used, it needed an alloying element to improve the mechanical properties of the aluminum. Aluminum Matrix Composite (AMC) or better known as aluminum matrix composite is one type of material that has great potential to be developed, due to its good combination and properties such as high strength and hardness, low density, low density, capable of good machining, and its basic ingredients are easily found on the market and cheaper than other materials. This research was conducted using the stir casting process to be able to mix all the compositions contained in aluminum matrix composites and to help the distribution of alumina reinforcing particles (Al2O3) and aluminum matrices be evenly distributed. The parameters used in this casting process are varying the volume fraction of the Al2O3 amplifier by 0.5%; 1.5% and 2.5% plus the magnesium content remains 0.9%. The results showed that the addition of Al2O3 can increase the value of hardness and reduce the value of tensile strength. The highest hardness value was 75.3 HRB at the addition of Al2O3 by 2.5% and the lowest tensile strength value was 7.17 Kgf / mm2 with the percentage of Al2O3 addition of 0.5%.

Optimization of Stirring Parameters Through Numerical Simulation for the Preparation of Aluminum Matrix Composite by Stir Casting Process

2010 ◽  
Vol 132 (6) ◽  
Author(s):  
Hai Su ◽  
Wenli Gao ◽  
Hui Zhang ◽  
Hongbo Liu ◽  
Jian Lu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Pattern ◽  
Matrix Composite ◽  
Process Parameters ◽  
Flow Behavior ◽  
Aluminum Matrix ◽  
Suitable Condition ◽  
Casting Process ◽  
Stir Casting ◽  
Aluminum Matrix Composite

The flow behavior of the fluid has a significant effect on the particle distribution in the solid-liquid mixing vessel. The stir casting process is generally conducted in a closed crucible, in which the flow pattern is invisible. Therefore, numerical simulation is a forceful tool to guide the experimental research. In the present study, the fluid flow in the stirred crucible during stir casting has been simulated using finite element method. The effects of some important stirring process parameters, such as the blade angle, rotating speed, the diameter of the impeller, and the stirrer geometry, on the flowing characteristics of the molten matrix have been investigated in order to achieve the effective flow pattern to uniformly disperse the ceramic particles in the molten matrix. The simulation results show that the process parameters have significant effects on the flow behavior of the fluid in the stirred crucible. The various combinations of these parameters are beneficial to generate a suitable condition for the composite casting. Further experimental investigation reveals that the present work can provide a guide for the industrial preparation of aluminum matrix composite with a uniform particle reinforcement distribution by stir casting process.

Fabrication and Characterization of Aluminum Matrix Composite (AMCs) Reinforced Graphite by Stir Casting Method for Automotive Application

2020 ◽  
Vol 988 ◽  
pp. 17-22
Author(s):  
Suryana ◽  
Indah Uswatun Hasanah ◽  
Muhammad Fikri Fadhillah ◽  
Yordan Valentino Putra
Keyword(s):  
Mechanical Properties ◽  
Intermetallic Phase ◽  
Aluminum Matrix ◽  
High Hardness ◽  
Stir Casting ◽  
Aluminum Matrix Composite ◽  
Automotive Application ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
The Matrix

The effects of graphite and magnesium (Mg) addition on mechanical properties and microstructure of aluminum matrix composites (AMCs) have been investigated in this work. Aluminum alloy (ADC-12) was combined with graphite and Mg produced by stir casting. The effect of addition of graphite into the matrix has been studied with variation 2, 4 and 6 wt-% for each composite. The addition of Mg as wetting agent was introduced wit 0.4, 0.6 and 0.8 wt-% to promote wettability between ADC-12 and graphite. All composites were characterized both microstructures analysis and mechanical properties include tensile strength and hardness. The higher reinforcement content, the higher porosity formed, due to the tendency of de-wetting as well as particles agglomeration. One of the main intermetallic phase present evenly in aluminum matrix is Mg2Si. The addition of magnesium in the material that will form Mg2Si primary phases which have a high hardness value of these composites.

scholarly journals Investigations on the Tribological Performance of A390 Alloy Hybrid Aluminum Matrix Composite

2018 ◽  
Author(s):  
Abhilash Edacherian ◽  
Ali Algahtani ◽  
Vineet Tirth
Keyword(s):  
Hybrid Composites ◽  
Aluminum Matrix ◽  
Particulate Composite ◽  
Casting Process ◽  
Stir Casting ◽  
Aluminum Matrix Composite ◽  
Tribological Performance ◽  
Processing Route ◽  
Soft Phase ◽  
A390 Alloy

Several challenges stand in the way of production of Metal Matrix Composites (MMCs) such as higher processing temperatures, particulate mixing, particulate-matrix interface bonding issues and ability to process into desired geometrical shapes. Although there are many literatures showing composites with single particulate reinforcements, the studies on composites with multiple reinforcing agents (hybrid composites) are found to be limited. Development of a hybrid particulate composite with optimized mechanical and tribological properties is very significant to suit modern engineering applications. In this study, Al-Si hypereutectic alloy (A390) is used as the matrix and Silicon Carbide (SiC) and Graphite (Gr) and Molybdenum di-Sulphide (MoS2) are used as particulates. Particulate volume (wt%) is varied and sample test castings are made using squeeze casting process through stir casting processing route. The evaluation of mechanical properties indicates that presence of both the hard phase (SiC) and the soft phase has distinct effect on the properties of Hybrid Composite. Composite samples were characterized to understand the performance and to meet the tribological applications. Fractography study indicated an intra-granular brittle fracture for hybrid composites. Wear study shows that Hybrid MMCs has better tribological performance compared to that of A390 alloy.

Feasibility study of a novel method for production of glassy reinforced composite Al–Ni60Nb40 of powder thixoforging

2018 ◽  
Vol 53 (2) ◽  
pp. 183-196
Author(s):  
Z Nouri ◽  
M Sedighi ◽  
H Minouei
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Matrix Composite ◽  
Fracture Strain ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Reinforced Composite ◽  
High Efficient ◽  
Compression Yield Strength ◽  
Cast Condition

In the present study, the semisolid forming has been proved to be effective in fabricating amorphous reinforced aluminum matrix composite of high quality with appreciable mechanical properties. In other words, the Ni60Nb40 glassy reinforcement in 520.0 aluminum matrix composite was successfully fabricated via powder thixoforging without altering the glassy nature. Most prior studies are focused on solid state (powder metallurgy). Subsequently, the use of glassy particles with high crystallization temperatures provides processing the composite at higher temperatures. Considering the powder thixoforming benefits, we open a door to another way of manufacturing high-efficient amorphous reinforced metal matrix composite with brilliant mechanical properties. In monolithic matrix, the alloy produced via powder thixoforging hardness and compression yield strength reached 223(HV) and 747 MPa compared to as cast condition increase of 116% and 228%, respectively. Additionally, this significant mechanical strength was combined with a brilliant fracture strain of 40%. Moreover, the 30 vol.% glassy reinforced composite possess hardness, compression yield strength, and fracture strain of 311(HV), 875 MPa, and 13%, respectively. All produced specimens reached near full density over 99% relative density, leading to a considerable combination of superior strength and ductility. Significantly, the SYS of powder thixoforging samples significantly increased from 89 kN m kg−1 for as cast condition to 290, 238, 220, and 199 kN m kg−1 for the monolithic and amorphous reinforced Al matrix composites of 12, 20 and 30 vol.%.

scholarly journals Improving mechanical properties of aluminium alloy through addition of coconut shell-ash

1970 ◽  
Vol 36 (3) ◽  
pp. 34-43
Author(s):  
A. Apasi ◽  
D. S. Yawas ◽  
S. Abdulkareem ◽  
M. Y. Kolawole
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Volume Fraction ◽  
Microstructural Analysis ◽  
Casting Process ◽  
Stir Casting ◽  
Coconut Shell ◽  
Percentage Increase ◽  
The Matrix ◽  
Coconut Shell Ash

This paper investigates the microstructure and mechanical properties of aluminum alloy (Al-Si-Fe) reinforced with coconut shell-ash particulate. The aluminium (Al-Si-Fe) alloy composite was produced by a double-stir casting process at a speed of 700 rpm for 10 and 5 minutes at first and second stirring respectively. The samples produced from addition of 0-15 wt% coconut shellash particles (CSAp) were prepared and subjected to microstructural and mechanical properties testing. The results of the microstructural analysis of the composite reveal a fairly uniform distribution of the coconut shell-ash particles in the matrix with increase in volume fraction of CSAp. The mechanical property test results revealed that, hardness of the developed composite increased with increasing percentage weight of CSAp. Also the tensile and yield strength at 0.2% offset values of Al-Si-Fe/CSAp composite increased with percentage increase in CSAp up to 9% addition above which a little decrease in both tensile and yield strength was observed.Keywords: Matrix, coconut shell, mechanical properties, stir- casting, particulate, reinforcements

scholarly journals Mechanical Behaviors of Al-Based Metal Composites Fabricated by Stir Casting Technique

2020 ◽  
Vol 01 (04) ◽  
pp. 144-149
Author(s):  
Mostafizur Rahman ◽  
Sadnan Mohosin Mondol
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Energy Absorption ◽  
Impact Energy ◽  
High Hardness ◽  
Casting Process ◽  
Stir Casting ◽  
Specific Yield ◽  
Mechanical And Thermal Properties ◽  
Casting Technique

Recently, the demands of composite materials used in various engineering applications are growing higher because of their outstanding mechanical and thermal properties. This study represents an experimental investigation to determine mechanical properties of Al-based composites materials using Cu and SiC as reinforcement. Al-30-wt%-Cu, Al-40-wt%-Cu, Al-30-wt%-SiC, and Al-40-wt%-SiC composite bars were fabricated using stir casting process to ensure uniform distribution of reinforced elements. The composite bars were prepared into required shape to conduct test for evaluating mechanical properties. Al-40-wt%-Cu shows improved properties such as, hardness, strength, and impact energy absorption than Al-30-wt%-Cu due to more presence of Cu content. Al-30-wt%-Cu and Al-40-wt%-Cu bars showed improved mechanical properties than both Al-30-wt%-SiC and Al-40-wt%-SiC. It is also seen that Al-30-wt%-Cu and Al-40-wt%-Cu showed high hardness, yield strength, and impact energy absorption compared to Al-30-wt%-SiC and Al-40-wt%-Cu respectively. On the other hand, Al-30-wt%-Cu is 3.5% lightweight than Al-30-wt%-SiC and Al-40-wt%-Cu is 2.11% lightweight than Al-40-wt%-SiC. Al-30-wt%-Cu and Al-40-wt%-Cu showed improved specific hardness, specific yield strength, and specific impact energy absorption compared to Al-30-wt%-SiC and Al-40-wt%-Cu respectively. In addition, Al-40-wt%-Cu showed better mechanical properties among the bars.

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