Fabrication and Investigation of Damping Properties of Nano Particulate Composites

Umashankar, K S; Gangadharan, K. V.; Desai, Vijay; Shivamurthy, B.

doi:10.4236/jmmce.2010.99059

Cited by 8 publications

(4 citation statements)

References 13 publications

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“…Dynamic behaviors of the composite materials and structures were investigated in order to improve the damping behavior at high temperatures [ 12 , 13 , 14 ]. Many authors have investigated dynamic characteristics of composite materials and structures using free vibration methods [ 15 , 16 , 17 , 18 , 19 , 20 ]. Adding reinforcement particles to the metal matrix composites can change their mechanical and dynamic properties.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics Study for Surface Composite of AMMNCs Matrix Fabricated by Friction Stir Process

Moustafa

2018

Materials

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In the present work, Aluminum Metal Matrix Surface Nano Composites (AMMSNCs) were manufactured using Friction Stir Processing (FSP). Moreover, the fabricated surface composite matrix was exposed to a different number of tool passes with different processing parameters. The tensile test and microstructure examinations were used to study the mechanical properties of the composite surface. The dynamic properties were predicted using modal analysis and finite element methods. After this, dynamic characterization was achieved by combining the numerical and experimental methods to investigate the effects of changing the number of passes on the natural frequency and the damping capacity of the AMMSNCs manufactured using FSP. The results indicated that the damping capacity and dynamic behavior improved with an increased number of FSP passes.

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Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics Study for Surface Composite of AMMNCs Matrix Fabricated by Friction Stir Process

Moustafa

2018

Materials

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“…[5][6][7][8][9][10].Vibration damping is one of the important requirements of the material when using it as machine base, frame, mountings and other supports. If the material's resistance to vibration or absorption of vibration energy is predominant, the ill effects in the mechanical systems will be greatly minimized [11][12][13][14].Vibration properties like damping factor and natural frequency of the Aluminium based composites were investigated by many researchers and reported that the reinforcements enhances the natural frequency and damping factor [13][14][15][16][17]. Mechanical behaviour like tensile, compression and flexural behaviour is analyzed with tungsten carbide reinforced aluminium composites [2] but no one reported wear and vibration analysis of tungsten carbide reinforcements with AA6061 aluminium alloy.…”

Section: Boronmentioning

confidence: 99%

Analysis of Damping and Wear Characteristics of Tungsten Carbide reinforced AA6061 Composites

Kumar¹,

Suresh²,

G.selvakumar³

et al. 2021

IRJASH

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In this research, vibration damping property and dry sliding wear resistance of tungsten carbide reinforced aluminium AA6061 composites were investigated. The fabrications of test specimen were carried out using stir casting method. Three samples were taken for study with percentage of reinforcements as 0%, 4% and 8% of tungsten carbide by volume fraction. The samples are cut and machined to cylindrical pin as per ASTM standard for pin-on-disc wear analysis. Another set of samples with rectangular cross section is used as beam for experimental modal analysis using Impact hammer test to study the damping factor and natural frequency. Based on the test results, it was found that there is minimum wear resistance in reinforced alloy when compared to unreinforced alloy and also reinforced alloy had improved coefficient of friction. From the impact hammer test, the result shows that reinforced alloy had high natural frequency and improved damping factor when compared with unreinforced alloy. The hard ceramic tungsten carbide particulate improves the resistance to wear as well as improved the damping behaviour. This research can be helpful in many industrial application, heavy machineries, automotive applications This material can be developed to use as machine base, chassis where wear resistance and vibration damping needs to predominantly monitored.

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“…The sintered material thus obtained was extruded through the die to obtain a product having a 10 mm diameter. The drawing speed during the extrusion process was maintained at 1.2 mm/second with an applied pressure of 21 MPa [8,9]. X-ray Diffractometer (XRD) (JEOL -JDX-8P) analysis of the procured LM6 alloy and the fabricated nanocomposites was carried out.…”

Section: Specimen Preparationmentioning

confidence: 99%

Dry sliding wear characteristics of multi-walled carbon nanotubes reinforced Al-Si (LM6) alloy nanocomposites produced by powder metallurgy technique

Shivaramu¹,

U²,

Umashankar³

2020

Mater. Res. Express

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The present work involved the production of Metal Matrix Composites (MMCs) of Aluminium Silicon (Al-Si) alloy reinforced with Multi Walled Carbon Nano Tubes (MWCNTs) using Powder Metallurgy (PM) process. MWCNTs with concentrations of 0, 0.25, 0.5, 0.75 and 1.0 wt% were used. Validation of dispersion nature, existence and chemically stable of MWCNTs carried out using Transmission Electron Microscope (TEM), X-ray Diffractometer (XRD) and Energy Dispersive Spectrum (EDS) for fabricated composites. Sliding wear investigations were investigated in accordance with the ASTM G99-95a standard. Test variables such as sliding distance, load and speed were examined. Under a given load with sliding distance, the wear rate was found to reduce by varying disc rotation speed between 250 to 750 rpm. The rate of wear is dropped suddenly with the increment in sliding distance from 500 m to 1000 m. However, for 1500 m sliding distance, the wear rate increased linearly for all nanocomposites. The reinforcement of 0.25 wt% and 0.5 wt% of MWCNTs shown lower wear resistance and further addition of 0.75 wt% MWCNTs shown enhanced wear resistance but the addition of reinforcement of above 0.75 wt% resulted in slightly higher wear rate. The wear resistance enhanced due to the excellent properties of reinforcement particles. The Scanning Electron Microscope (SEM) was used for identifying the kind of wear mechanism.

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Fabrication and Investigation of Damping Properties of Nano Particulate Composites

Cited by 8 publications

References 13 publications

Dynamic Characteristics Study for Surface Composite of AMMNCs Matrix Fabricated by Friction Stir Process

Dynamic Characteristics Study for Surface Composite of AMMNCs Matrix Fabricated by Friction Stir Process

Analysis of Damping and Wear Characteristics of Tungsten Carbide reinforced AA6061 Composites

Dry sliding wear characteristics of multi-walled carbon nanotubes reinforced Al-Si (LM6) alloy nanocomposites produced by powder metallurgy technique

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