Microstructural Analysis and Mechanical Properties of Pure Al–GNPs Composites by Stir Casting Method

Subbaiah, Venkata; Palampalle, Bhanu Prakash; Brahmaraju, K

doi:10.1007/s40032-018-0491-1

Cited by 13 publications

(6 citation statements)

References 17 publications

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“…Table 3 shows the estimated crystal size of different elements. 31,32 As the proportion of reinforcements i.e. Graphite and TiC increases in the AA6351 metal matrix, a decrease in the crystal size of TiC is observed.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Evaluation of phase, microstructural and mechanical characteristics in stir casted AA6351-Gr-TiC hybrid metal matrix composites

Ali,

Murtaza,

Gupta

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The demand for advanced materials with enhanced mechanical properties for various engineering applications has spurred research into hybrid metal matrix composites. This study aims to explore the influence of incorporating Gr-TiC reinforcement particles into the AA6351 metal matrix. The fabrication process involved adding different weight percentages of Gr-TiC (0.5-0.5, 1.0-1.0, 1.5-1.5, and 2.0-2.0 wt%) to the AA6351 metal matrix using the liquid metallurgy technique. Comprehensive analyses were conducted on the fabricated samples to assess their phase, microstructure, EDS, density, hardness, tensile strength and fractured morphology. X-ray diffraction analysis showed that the interfacial bonding between the matrix and reinforcement particles caused a preparatory stage of development. Moreover, scanning electron microscopy confirmed that the reinforcement particles were uniformly distributed throughout the aluminum matrix. Due to the presence of graphite and porosity in the fabricated samples, the density of the aluminum metal matrix decreased. The samples with a reinforcement proportion of 2.0 wt% graphite and 2.0 wt% TiC exhibited the lowest density of 2.61 gram/cc. The maximum levels of hardness, engineering ultimate tensile strength, and true ultimate tensile strength were observed at a weight percentage of 1.0 wt% for both Gr and TiC, with values of 85 HRC, 206.7 N/mm2, and 260.43 N/mm2 respectively.

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Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Evaluation of phase, microstructural and mechanical characteristics in stir casted AA6351-Gr-TiC hybrid metal matrix composites

Ali,

Murtaza,

Gupta

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Stir casting has been used for the manufacturing of pure aluminum GNPs composites because it has a lower initial cost than other fabrication techniques. The author detailed the manufacturing of Al-GNPs composites in his prior work [1]. Mechanical stirring was used to distribute the reinforcing phases in the molten matrix metal during the fabrication process.…”

Section: Composite Fabricationmentioning

confidence: 99%

“…Graphene's mechanical, physical, optical, and thermal properties make it an outstanding metal composite reinforcement material. Pure aluminum graphene nanoplatelets (GNPs) were reinforced in a base matrix (pure Al) with different weight percentages to form aluminum metal matrix composites using stir casting [1,2] powder metallurgy [3] and other techniques. The uniform distribution of graphene nanoplatelets [4,5] in the aluminum matrix improves mechanical properties significantly.…”

Section: Introductionmentioning

confidence: 99%

Selection of Optimal Material from Stir Cast Aluminum Graphene Nano Platelets Composites for Aerospace Applications

Palampalle¹,

Dharmalingam²,

Royal³

2022

Aluminium Alloys - Design and Development of Innovative Alloys, Manufacturing Processes and Applications

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Qualitative and quantitative requirements when selecting materials for different properties can be difficult and ambiguous. An insufficient variety of materials can lead to component malfunction and failure at any point during their service. Owing to the vast availability of dissimilar materials, material selection in the engineering design phase is difficult and elusive. This study presents an EDAS (Evaluation based on Distance from Average Solution) and VIKOR (VIse Kriterijumska Optimizacijakompromisno Resenje) techniques for effective material selection for aviation applications. In this research, the selection index value was calculated using the EDAS and VIKOR entropy-based weight techniques. The MADM (multi-attribute decision making) procedure also selects the best weight per cent combination among pure aluminum reinforced with GNPs (graphene nanoplatelets) for aircraft applications based on its physical and mechanical properties. The results demonstrate that 0.5 wt% GNPs reinforced in pure aluminum has the best combination of both physical and mechanical qualities, according to the EDAS and VIKOR multi-criteria decision-making methodologies. The composites were made using the stir casting technique. MATLAB R2020a is used to grade and compare the composite materials.

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“…Aluminum graphene nanoplatelet composites were fabricated by the stir casting method to increase the mechanical properties of aluminum. [15]. Heat transfer in condenser tank using Al2O3-DI water Nanofluids was analyzed in this experiment, and it was observed that nanofluid enhances the heat transfer and the convective heat transfer coefficient [16].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Heat Exchangers with Graphene as Al2O3 Nanofluid Coatings

Biswajit Choubey,

H.S. Sahu

2024

Int. J. Sci. Res. Comput. Sci. Eng. Inf. Technol

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A well-designed heat exchanger improves the effectiveness of the heat exchanger. A hairpin heat exchanger resembles a hairpin when a shell-and-tube heat exchanger with a single-pass unit is folded in half, which can be used where space is a constraint. Design, CFD analysis and evaluation of various parameters of hairpin heat exchanger with graphene layer and its comparison with hairpin heat exchanger without graphene layer is the main aim of this paper. The heat exchanger is modified with the addition of a graphene layer on both the side (inner and outer side) of the tube of the heat exchanger. Graphene is an allotropic form of carbon having a single layer of atoms distributed in a 2-D honeycomb lattice. The coefficient of thermal conductivity of graphene is very high as compared to other materials. In addition to it, nanofluid Al2O3 is introduced as cold fluid. Nanofluids are colloidal suspensions made of nanoparticles in some base fluid. ANSYS FLUENT 2020 has been used to model the geometry and to perform numerical simulation. Turbulent flow conditions were used to analyse the heat exchanger. CFD analysis has been done on hairpin heat exchangers using graphene layer. The results indicate that the high thermal conductivity of graphene increases rate of heat transfer, and the numerical value of convective heat transfer coefficient is also high.

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Microstructural Analysis and Mechanical Properties of Pure Al–GNPs Composites by Stir Casting Method

Cited by 13 publications

References 17 publications

Evaluation of phase, microstructural and mechanical characteristics in stir casted AA6351-Gr-TiC hybrid metal matrix composites

Evaluation of phase, microstructural and mechanical characteristics in stir casted AA6351-Gr-TiC hybrid metal matrix composites

Selection of Optimal Material from Stir Cast Aluminum Graphene Nano Platelets Composites for Aerospace Applications

Enhancing Heat Exchangers with Graphene as Al2O3 Nanofluid Coatings

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