Mechanical and Microstructure Characterization of A356 (Al/SiC) MMC

2014 ◽  
Vol 875-877 ◽  
pp. 135-144
Author(s):  
Nagwa E. Elzayady ◽  
R.M. Rashad ◽  
A. Elenany ◽  
A. Elhabak
Keyword(s):  
A356 Alloy ◽  
Stir Casting ◽  
Unreinforced Alloy ◽  
Compression Stress ◽  
Standard Samples ◽  
Casting Technique ◽  
Rotating Speed ◽  
Sic Ceramic ◽  
Semi Solid

The present investigation aims to study the microstructure and mechanical properties of (A365/ SiC particulate) MMC produced by stir casting technique. The A356 matrix was reinforced by the addition of 3% SiC ceramic particulate having particle size ranging from 20-90 μm. The SiC particles were added to the molten in the semi-solid state during stirring at rotating speed of 700 r.p.m for duration of 1 minute. The composite was then poured in a preheated metallic mould, after which standard samples were prepared for microstructure and mechanical testing characterization. The results of the study revealed that the consolidation of the SiC and its distribution in the A356 matrix as investigated from the microstructure has increased; the tensile stress from 170 to 195 MPa, compressive yield limit from 156.5 to 190 MPa and ultimate compression stress at 35% strain increased from 350 to 460 MPa. Also macro-hardness of composite material has increased from 72.5 HV for unreinforced alloy to 80 HV, while the elongation% and impact toughness was reduced by 25% and 55% respectively. On the other hand, a dramatic increase in the toughness value for un-notched impact samples of A356 alloy when it cast in SSM (20 J) rather than that when it cast in fully liquid state (6 J).

Mechanical characterization of LM25 alloy matrix composite reinforced with boron carbide

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.

scholarly journals Effect of addition of different reinforcements on the microstructure and mechanical characterization of the Al-Flyash composites

2021 ◽  
Vol 15 (56) ◽  
pp. 217-228
Author(s):  
Milind K. Wasekar ◽  
Mohan P. Khond
Keyword(s):  
Tensile Strength ◽  
Hybrid Composites ◽  
Tensile Tests ◽  
Stir Casting ◽  
Interface Bonding ◽  
Casting Technique ◽  
Testing Procedures ◽  
The Matrix ◽  
Aluminum 6061 Alloy

The aim of this work is to investigate the influence of the addition of silicon carbide and molybdenum disulfide on the microstructure and the tensile strength of the Al-Flyash hybrid composites prepared using the stir casting technique. The composite with aluminum 6061 alloy as the matrix and flyash as the reinforcement, with different weight fractions, is investigated to study its microstructure and the tensile strength. The same has been compared with the hybrid composites with Aluminum-Flyash/SiC and Aluminum-Flyash/MoS2 for different weight fractions of the reinforcements. The tensile tests were conducted as per ASTM standard testing procedures at room temperature. From the results it is identified that tensile strength of the Al6061-Flyash composite is lesser than the Al6061-Flyash/SiC and Al6061-Flyash/MoS2 hybrid composites. It is also observed that increment in the composition of the SiC and MoS2 causes the increment in the tensile strength of the hybrid composite. This increment in the tensile strength is due to good interface bonding and uniform distribution of the reinforcements in the composite.

scholarly journals Characterization of AMCs Produced by Stir Casting Technique

2021 ◽  
Vol 1123 (1) ◽  
pp. 012006
Author(s):  
M Saleem ◽  
Nishant Kumar raj ◽  
Yogesh kumar ◽  
Pranav Kumar
Keyword(s):  
Stir Casting ◽  
Casting Technique

Effect of Particle Size and Weight Percent of SiC Particles on Microstructure and Hardness of A356-SiC Composites Produced by Semi-Solid Stir Casting

2019 ◽  
Vol 285 ◽  
pp. 296-301 ◽  
Author(s):  
Phuriphut Saenpong ◽  
Sukangkana Talangkun ◽  
Satawat Sanyajivin ◽  
Plato Kapranos
Keyword(s):  
Particle Size ◽  
A356 Alloy ◽  
Weight Percent ◽  
Stir Casting ◽  
Effect Of Particle Size ◽  
Sic Particulates ◽  
Semi Solid ◽  
Sic Composites ◽  
Hardness Values ◽  
Cast Condition

This research investigates the effects of particle size and weight percent on the hardness of A356 matrix composite reinforced with SiC particulates produced by semi-solid stir casting. The particle sizes of the reinforcing phase were in the form of 37 and 100 μm SiC powders with loading content of 5, 10, 15 and 20 percent by weight. A356 alloy was melted and SiC powder was then gradually added into the continuously stirred slurry to promote uniform distribution of the particulates. It has been found that in the as cast condition, the average hardness values of A356 reinforced with different amounts of 37μm SiC, increase as expected with increasing amounts of particulates. A356 reinforced with 100 μm 10 wt% SiC, followed by T6 treatment, exhibited the highest percentage of hardness increment.

scholarly journals Synthesis and Characterization of In-Situ AA8011-TiB2 Composites Produced by Flux Assisted Synthesis

2020 ◽  
Vol 44 (5) ◽  
pp. 333-338
Author(s):  
Muthamizh Selvan Bellamballi Munivenkatappan ◽  
Sathish Shanmugam ◽  
Anandakrishnan Veeramani
Keyword(s):  
Tensile Strength ◽  
Stir Casting ◽  
Matrix Composites ◽  
Maximum Hardness ◽  
Percentage Elongation ◽  
X Ray ◽  
Casting Technique ◽  
Energy Dispersive Spectroscope

In-situ aluminium alloy 8011 matrix composites containing different weight percentages of titanium diboride were synthesized by flux assisted synthesis using stir casting technique. The metallurgy of the in-situ AA8011-TiB2 composites was analyzed using X-ray diffractometer, scanning electron microscope and energy dispersive spectroscope to disseminate the formation and distribution of reinforcements. Density, microhardness and tensile strength of cast AA8011 and in-situ AA8011-TiB2 composites were measured and analyzed. The in-situ formed TiB2 reinforcements showed the maximum hardness of 55.03 Hv and the maximum tensile strength of 158.2 MPa for 8 wt. % of TiB2 whereas the percentage elongation of 7.2% is observed at 4 wt. % of TiB2. Further, the fractography analysis performed on the fractured tensile samples and the mechanism of failures were identified and reported.

Synthesis and Characterization of Aluminiun 2219 Reinforced with Boron Carbide and Molybdenum Disulfide Metal Matrix Hybrid Composites

2015 ◽  
Vol 1101 ◽  
pp. 28-31 ◽  
Author(s):  
G.S. Shiva Shankar ◽  
S. Basavarajappa
Keyword(s):  
Boron Carbide ◽  
Molybdenum Disulfide ◽  
Hybrid Composites ◽  
Hardness Test ◽  
Xrd Analysis ◽  
Stir Casting ◽  
Test Results ◽  
Physical Content ◽  
Casting Technique

An attempt has been made to develop and characterize the Al2219 reinforced with Boron carbide (B4C) and Molybdenum disulfide (MoS2) hybridcomposites. The hybrid composites were prepared by using stir casting technique. Theexperimentalresult evaluates the density,micro hardness test & tensiletest.Themicrostructure shows existence of randomly dispersed reinforcement particles andfine reinforcement particles in prepared hybrid composites.X-Ray powder diffraction (XRD) analysis were conducted this confirms the physical content of constituents present in prepared composites. SEM is used to examine fracture surface of tensile specimens for hybrid composites & this consists of ductile& brittle fracture of mixed mode.The test results revels that, themicro hardness and density is minimum for Al2219 and maximum for Al+3%B4C+5%MoS2. The tensile properties of the material vary according to the percentage of reinforcing material added.

scholarly journals Investigation of Mechanical Properties of Al7Si/ SiC and Al7SiMg/SiC Composites Produced by Semi Solid Stir Casting Technique

2018 ◽  
Vol 159 ◽  
pp. 02036
Author(s):  
Sulardjaka ◽  
Sri Nugroho ◽  
Suyanto ◽  
Deni Fajar Fitriana
Keyword(s):  
Mechanical Properties ◽  
Average Particle Size ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Reinforcement Particle ◽  
Aluminum Matrix Composites ◽  
Average Particle ◽  
Matrix Composites ◽  
Casting Technique ◽  
Semi Solid

Mechanical characteristic of silicon carbide particle reinforced aluminum matrix composites produced by semi solid stir casting technique was investigated. Al7Si and Al7SiMg were used as metal matrix. High purity silicon carbida with average particle size mesh 400 was used as reinforcement particle. Aluminum matrix composites with variation of SiC: 5 %, 7.5 % and 10 % wt were manufactured by the semi solid stir casting technique. Stiring process was performed by 45 ° degree carbide impeller at rotation of 600 rpm and temperature of 570 °C for 15 minutes. Characteritation of composites speciment were: microscopic examination, density, hardness, tensile and impact test. Hardness and density were tested randomly at top, midlle and bottom of composites product. Based on distribution of density, distribution of hardness and SEM photomicrograph, it can be concluded that semisolid stir casting produces the uniform distribution of particles in the matrix alloy. The results also indicate that introducing SiC reinforcement in aluminum matrix increases the hardness of Al7Si composite and Al7SiMg composite. Calculated porosities increases with increasing wt % of SiC reinforcements in composite. The addition of 1 % Mg also increases the hardness of composites, reduces porosities of composite and enhances the mechanical properties of composites.

scholarly journals Mechanical characterization of precipitation hardened Al7075-grey cast iron powder reinforced metal matrix composites

2018 ◽  
Vol 144 ◽  
pp. 02007 ◽  
Author(s):  
Jamaluddin Hindi ◽  
Kini Achuta ◽  
Murthy Amar
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Aging Temperature ◽  
Stir Casting ◽  
Grey Cast Iron ◽  
Age Hardening ◽  
Casting Technique ◽  
Specific Strength ◽  
Grey Cast

Al7075 alloy is the most commonly used by the aerospace industry. Al7075 alloy is characterized by its improved properties such as higher toughness, specific strength and hardness. The current work focuses on the preparation and characterization of age hardened Al7075-Grey cast iron composites. Two stage stir casting technique is used for the preparation of the composite. Age hardening treatment is imparted to enhance the mechanical characteristics. The variation of hardness and tensile strength with respect to aging temperature and percentage of reinforcement is analyzed. The composites exhibit higher hardness and tensile strength as the reinforcement percentage is increased at an aging temperature of 100°C.

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