Influence of Multiwall Carbon Nanotubes (MWCNT) on Wear and Coefficient of Friction of Aluminium (Al 7075) Metal Matrix Composite

2018 ◽  
Vol 5 (2) ◽  
pp. 7748-7757 ◽  
Author(s):  
Omkar Aranke ◽  
Chaitanya Gandhi ◽  
Nikhil Dixit ◽  
P. Kuppan
Keyword(s):  
Carbon Nanotubes ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Coefficient Of Friction ◽  
Metal Matrix ◽  
Multiwall Carbon Nanotubes ◽  
Al 7075 ◽  
Multiwall Carbon

scholarly journals Microstructure evaluation, thermal and mechanical characterization of hybrid metal matrix composite

2018 ◽  
Vol 25 (6) ◽  
pp. 1187-1196 ◽  
Author(s):  
Shyam Lal ◽  
Sudhir Kumar ◽  
Zahid A. Khan
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Casting Process ◽  
Xrd Analysis ◽  
Stir Casting ◽  
Al 7075 ◽  
Dta Analysis ◽  
Hybrid Metal Matrix Composite ◽  
7075 Alloy

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.

Microstructural Studies of Aluminium 7075-Silicon Carbide-Alumina Metal Matrix Composite

2014 ◽  
Vol 984-985 ◽  
pp. 194-199 ◽  
Author(s):  
B. Rajeswari ◽  
K.S. Amirthagadeswaran ◽  
K. Ramya
Keyword(s):  
Silicon Carbide ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Stir Casting ◽  
Optical Microscope ◽  
Homogeneous Distribution ◽  
Modern Development ◽  
Al 7075 ◽  
Composite Samples

The modern development in the field of science and technology has created a demand for many advanced engineering materials. In recent days, aluminium related metal matrix composite is a probable material for many applications such as transport, aerospace, marine and automobile applications. In this paper, experiments were conducted on composite having various weight fractions of SiC and Al2O3particulates fabricated by stir casting method. Characterization studies were conducted on the Al 7075 alloy and composite samples to assess the hardness and microstructural properties. Final samples were tested for hardness using vickers hardness machine. Microstructure examination was conducted by optical microscope. Microstructure of the composite samples reveals the presence and homogeneous distribution of reinforcements in the Al 7075 matrix. The hardness of aluminium metal matrix composites was increased due to the addition of silicon carbide and alumina reinforcements.

Mechanical Properties and Microstructural Behavior of a Metal Matrix Composite Processed by Severe Plastic Deformation Techniques

MRS Advances ◽  
2015 ◽  
Vol 1 (58) ◽  
pp. 3865-3870 ◽  
Author(s):  
Shima Sabbaghianrad ◽  
Terence G. Langdon
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Room Temperature ◽  
High Pressure Torsion ◽  
Average Grain Size ◽  
Al 7075 ◽  
7075 Alloy

ABSTRACTA severe plastic deformation (SPD) technique was applied to an Al-7075 alloy reinforced with 10 vol.% Al2O3. This processing method of high-pressure torsion (HPT) was performed at room temperature under a pressure of 6.0 GPa through a total number of up to 20 turns. The metal matrix composite (MMC) showed a significant grain refinement from an initial average grain size of ∼8 μm to ∼300 nm after processing by HPT through 20 turns which led to an increase in the average values of Vickers microhardness at room temperature.

Investigation of flexural and impact strength of carbon nanotube reinforced AA7075 metal matrix

2018 ◽  
Vol 7 (2) ◽  
pp. 764
Author(s):  
Pothamsetty Kasi V Rao ◽  
B Raghu Kumar ◽  
B Sudheer Kumar ◽  
G Phanindra Swamy ◽  
Y Ganga Raju ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Impact Strength ◽  
Flexural Strength ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Casting Process ◽  
Stir Casting ◽  
Pure Metal ◽  
Mechanical Tests

Metal matrix nano-composites are grabbing more attention by many researchers in the recent years as they exhibit outstanding properties when compared to pure metal alloys. In the present study Aluminium Alloy 7075 was selected as the matrix and carbon nanotubes was selected as reinforcing element to investigate the percentage enhancement of flexural strength and impact strength of metal matrix composite. Stir casting process was selected to fabricate the specimens. The multi walled carbon nanotubes with different weight percentages (0.5, 1.0, 2.0, 5.0 wt %) were selected to prepare the AA7075-CNT metal matrix composite.  Microstructure and dispersion of CNT was examined using Scanning Electron Microscope (SEM) with EDX. The experimental results of mechanical tests showed that if the MWCNTs particle content increases considerably flexural strength and impact strength also increases about 125% and 90% respectively. Thus the AA7075-CNT metal matrix can be used in automobile and aerospace applications under high load conditions.

Tool wear and cutting force investigations during turning 15 wt% SiCp-Al 7075 metal matrix composite

2020 ◽  
Vol 26 ◽  
pp. 854-859
Author(s):  
Diptikanta Das ◽  
Sandeep Kumar Pradhan ◽  
Ashok Kumar Sahoo ◽  
Amlana Panda ◽  
Mantra Prasad Satpathy ◽  
...  
Keyword(s):  
Tool Wear ◽  
Cutting Force ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Al 7075

Nano and macromechanical properties of aluminium (A356) based hybrid composites reinforced with multiwall carbon nanotubes/alumina fiber

2016 ◽  
Vol 51 (11) ◽  
pp. 1631-1642 ◽  
Author(s):  
JSS Babu ◽  
A Srinivasan ◽  
CG Kang
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Hybrid Composites ◽  
Multiwall Carbon Nanotubes ◽  
Matrix Composites ◽  
Weight Percentage ◽  
Continuous Stiffness Measurement ◽  
Multiwall Carbon

Nano-microhybrid reinforced metal matrix composites are the novel combination of composite system which enhanced the mechanical properties of the metal matrix composites. The aim of this study is to determine the nano- and macromechanical properties of aluminium (A356)-based hybrid composites reinforced with multiwall carbon nanotubes and alumina short fibers (Al2O3sf). Hybrid preforms were developed initially, by a combination of multiwall carbon nanotubes and Al2O3sf with total volume fractions of 10%, 15% and 20% and by varying the weight percentage of multiwall carbon nanotubes such as 1%, 2% and 3%. The fabricated hybrid preforms were then infiltrated with aluminium alloy (A356), and the microstructure and mechanical properties of the composites were evaluated. The distribution of multiwall carbon nanotubes within the array of the Al2O3sf network which exists in clusters was found to be relatively good. The mechanical properties such as the hardness and tensile strength of Al-based hybrid metal matrix composites were found to be improved by up to 2 wt% of multiwall carbon nanotubes. The causative reason for this is attributed to a combined effect of both multiwall carbon nanotubes and Al2O3sf, which contributed to better load sharing between the fibers and the Al matrix, and also accounted for the resistance of dislocation movements caused by the presence of the multiwall carbon nanotubes. In addition, the continuous stiffness measurement method was also used to evaluate the nanomechanical properties of the composites. The results showed that the influence of multiwall carbon nanotubes highlighted the properties on a nanoscale.

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