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.

scholarly journals Synthesis and mechanical characterization of Si3N4 reinforced copper-tin matrix composites

2021 ◽  
Vol 30 (1) ◽  
pp. 199-206
Author(s):  
Anjan Kumar B. Hanumantharayappa ◽  
Chaithra Prasanna ◽  
Chethana C. Ragavendra ◽  
Chandrasekhar Singh Beekam ◽  
Latha Shankar Boluvar ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Hardness Test ◽  
Stir Casting ◽  
Matrix Composites ◽  
X Ray ◽  
Casting Technique ◽  
The Matrix ◽  
Reinforcing Material ◽  
Sem Morphology

Abstract The present research reports improvement in mechanical performance of Copper-Tin(Cu-Sn) composites due to the addition of hard Si3N4 particles as reinforcement. Two-step stir casting technique was adopted to prepare Si3N4-reinforced Cu-Sn based composites. The uniform distribution of the reinforcement in the matrix was ensured by SEM morphology and energy-dispersive X-ray (EDAX) spectrum of the developed composites. Brinell hardness test and tension test were used to estimate the hardness and tensile strength of the composite. Si3N4 reinforcing materials added to the extent of 7.5% by wt. to Cu-Sn matrix enhanced hardness by 41% and UTS by 33%, YS by 29% and showed 23% decrement in ductility. Thus a comparison of Si3N4-reinforced Cu-Sn based composites with base metal has shown that considerable improvement in tensile properties such as UTS and YS and hardness if reinforcing material is added to the extent of 7.5%.

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.

Effects of Si content on the microstructure and tensile strength of an in situAl/Mg2Si composite

1999 ◽  
Vol 14 (1) ◽  
pp. 68-74 ◽  
Author(s):  
Jian Zhang ◽  
Yu-qing Wang ◽  
Bing Yang ◽  
Ben-lian Zhou
Keyword(s):  
Tensile Strength ◽  
Metal Matrix ◽  
Die Casting ◽  
Solidification Process ◽  
Matrix Composites ◽  
Fracture Characteristics ◽  
Casting Technique ◽  
Si Content ◽  
Strength And Ductility

Al/Mg2Si composites were in situ fabricated by the usual die-casting technique, and effects of the Si contents in the composites on microstructures and tensile strengths were investigated. Experimental results show that extra Si contents in Al/Mg2Si composites induce a ductile matrix and a uniform distribution of in situ particles. The refined microstructures lead to an obvious increase in both strength and ductility of the metal matrix composites (MMCs). The effects of extra Si on both the solidification process and fracture characteristics of the Al/Mg2Si composites were analyzed.

Metallurgical and Mechanical Characterization of Al 6082-B4C/Si3N4 Hybrid Composite Manufactured by Combined Ball Milling and Stir Casting

2014 ◽  
Vol 592-594 ◽  
pp. 484-488 ◽  
Author(s):  
Pardeep Sharma ◽  
Dinesh Khanduja ◽  
Satpal Sharma
Keyword(s):  
Ball Milling ◽  
Mechanical Characterization ◽  
Hybrid Composites ◽  
Stir Casting ◽  
Matrix Composites ◽  
Casting Method ◽  
Percentage Elongation ◽  
Silicon Nitride Powder ◽  
The Cost

Aluminium matrix composites (AMCs) having more than one reinforcement (hybrid AMCs) found enlarged use due to better strength, high thermal stability and wear resistance properties and can be a substitute for single reinforced AMCs .The effect of varying ball milled (BM) B4C/Si3N4 particles on the microstructure of as cast AA6082 and mechanical properties of AA6082 alloy hybrid composites produced by combined ball milling and conventional stir casting method have been reported. The combined reinforcement of BM B4C/Si3N4 particles were varied from 0-9 % in a step of 3. The wettability of B4C/Si3N4 into the aluminium melt has been increased by ball milling the boron carbide with silicon nitride powder, so that combined reinforcement of B4C/Si3N4 neither float nor sink in the aluminium melt. The investigated result showed that addition of combined reinforcement of BM B4C/Si3N4 increased Hardness and Ultimate tensile strength at the cost of reduction in percentage elongation.

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 In situ characterization of residual stress evolution during heat treatment of SiC/SiC ceramic matrix composites using high‐energy X‐ray diffraction

2020 ◽  
Vol 104 (3) ◽  
pp. 1424-1435
Author(s):  
Michael W. Knauf ◽  
Craig P. Przybyla ◽  
Paul A. Shade ◽  
Jun‐Sang Park ◽  
Andrew J. Ritchey ◽  
...  
Keyword(s):  
Ceramic Matrix Composites ◽  
High Energy ◽  
Matrix Composites ◽  
Stress Evolution ◽  
X Ray Diffraction ◽  
In Situ Characterization ◽  
X Ray ◽  
Sic Ceramic

Characterization of Damage Evolution in SiC Particle Reinforced Al Alloy Matrix Composites by In-Situ X-Ray Synchrotron Tomography

2011 ◽  
Vol 42 (10) ◽  
pp. 2999-3005 ◽  
Author(s):  
J. J. Williams ◽  
N. C. Chapman ◽  
V. Jakkali ◽  
V. A. Tanna ◽  
N. Chawla ◽  
...  
Keyword(s):  
Damage Evolution ◽  
Al Alloy ◽  
Matrix Composites ◽  
Alloy Matrix ◽  
X Ray ◽  
Synchrotron Tomography ◽  
Sic Particle

Preparation and Mechanical Characterization of Stir Cast Hybrid Al7075-Al2O3 -B4C Metal Matrix Composites

2014 ◽  
Vol 592-594 ◽  
pp. 705-710 ◽  
Author(s):  
S. Dhanalakshmi ◽  
N Mohanasundararaju ◽  
P.G. Venkatakrishnan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Hybrid Composites ◽  
Stir Casting ◽  
Matrix Composites ◽  
Constant Weight ◽  
Weight Percentage

A hybrid Al7075 metal matrix composites have been fabricated through liquid metallurgy route (Stir Casting method) using Al2O3 and B4C as reinforcement materials. The effect of weight percentage of reinforcement materials on mechanical properties of the composites have been studied by varying the weight percentage of Al2O3 as 3, 6, 9, 12 and 15% while keeping constant weight percentage of B4C (3%). The as-cast microstructure, tensile strength, micro and macro hardness of the fabricated hybrid composites have been studied. The mechanical properties of the prepared composites were increased with increasing the weight percentage of the reinforcement in the composite. The maximum tensile strength, micro-hardness and macro-hardness of 309 MPa, 140 VHN, and 112 BHN, respectively, were obtained for a hybrid Al7075 matrix composite containing 15% Al2O3 and 3% B4C.

scholarly journals A simple stir casting technique for the preparation of in situ Fe-aluminides reinforced Al-matrix composites

2016 ◽  
Vol 8 ◽  
pp. 529-532 ◽  
Author(s):  
Susanta K. Pradhan ◽  
Subhranshu Chatterjee ◽  
Amitava Basu Mallick ◽  
Debdulal Das
Keyword(s):  
Stir Casting ◽  
Matrix Composites ◽  
Casting Technique ◽  
Al Matrix Composites ◽  
Al Matrix
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