Investigation on microstructural, physical and mechanical properties of AA6082/(SiC + + Graphite) hybrid composites

2018 ◽  
pp. 40-46 ◽  
Author(s):  
P. Sharma ◽  
V. Dabra ◽  
S. Sharma ◽  
D. Khanduja ◽  
N. Sharma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Uniform Distribution ◽  
Hybrid Composites ◽  
Ceramic Powder ◽  
Research Work ◽  
Physical And Mechanical Properties ◽  
Aluminium Matrix ◽  
Scanning Electron Micrographs ◽  
Weight Percentage

The current research work prominences on the development of hybrid aluminium (AA6082) matrix composites (HAMC) reinforced with different weight percentages of (silicon carbide (SiC) + graphite (Gr)) ceramic particulates by conventional stir casting process. The weight percentage of combined ceramic powder is varied from 5 to 15 wt. % in a stage of 5 wt. %. The microstructures, physical properties such as density and porosity as well as mechanical properties like hardness and tensile strength of the fabricated hybrid composites are analyzed. The scanning electron micrographs reveal the uniform distribution of (SiC + Gr) ceramic particulates in the aluminium matrix. The uniform distribution of reinforcement particles has also been verifed with the help of elemental maps of different element present in the hybrid composites. Density and porosity of hybrid composite increases from 2,69 to 2,72 g/cm3and from 0,37 to 1,20 %, both the hardness as well as ultimate tensile strength have enhanced from 49,5 to 85 VHN and from 161,5 to 187 MPa respectively with a reduction in percentage elongationfrom 8,6 to 5,3 with rise in weight percentage of (SiC + Gr) ceramic particulates in the aluminium matrix from 0 to 15 wt. % respectively.Ill. 8. Ref. 49. Tab. 1.

scholarly journals Effects of Addition of Prosopis Juliflora Fiber on the Physical and Mechanical Properties of Wood Dust and Coir Pith Particle Reinforced Phenol Formaldehyde Hybrid Composite

2017 ◽  
Vol 13 (10) ◽  
pp. 6558-6562
Author(s):  
A. Athijayamani ◽  
A.Sujin Jose ◽  
K. Ramanathan ◽  
S. Sidhardhan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flexural Strength ◽  
Hybrid Composites ◽  
Phenol Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Prosopis Juliflora ◽  
Wood Dust ◽  
Weight Percentage ◽  
Coir Pith

In this study, Wood Dust (WD)/Phenol Formaldehyde (PF) and Coir Pith (CP)/PF composites were hybridized with the Prosopis Juliflora Fiber (PJF) to obtain the hybrid composites. Composites were prepared by hand moulding technique. The weight percentage of particles and fibers are fixed in the ratio of 1:1. Mechanical properties such as tensile, flexural and impact strengths were evaluated as a function of the particle and fiber loadings. The results show that the properties of both the WD and CP composites obviously improved by the addition of the PJF. The improvement in WD/PF composites was obviously higher than the CP/PF composites for all loadings. The WD/PJF/PF hybrid composites exhibited better tensile (strength of 48.9 MPA and modulus of 1262.1 MPa, respectively), flexural (strength of 55.4 MPa and modulus of 1344.3 MPa, respectively), and impact properties (1.32 KJ/m2). 

Effect of Castor Oil Impregnation on the Physical and Mechanical Properties of Bacterial Cellulose

2012 ◽  
Vol 3 (1) ◽  
pp. 13-26
Author(s):  
Myrtha Karina ◽  
Lucia Indrarti ◽  
Rike Yudianti ◽  
Indriyati
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Bacterial Cellulose ◽  
Young’S Modulus ◽  
Castor Oil ◽  
Young's Modulus ◽  
Physical And Mechanical Properties ◽  
Scanning Electron Micrographs ◽  
Elongation At Break ◽  
Acetone Water

The effect of castor oil on the physical and mechanical properties of bacterial cellulose is described. Bacterial cellulose (BC) was impregnated with 0.5–2% (w/v) castor oil (CO) in acetone–water, providing BCCO films. Scanning electron micrographs revealed that the castor oil penetrated the pores of the bacterial cellulose, resulting in a smoother morphology and enhanced hydrophilicity. Castor oil caused a slight change in crystallinity indices and resulted in reduced tensile strength and Young's modulus but increased elongation at break. A significant reduction in tensile strength and Young's modulus was achieved in BCCO films with 2% castor oil, and there was an improvement in elongation at break and hydrophilicity. Impregnation with castor oil, a biodegradable and safe plasticiser, resulted in less rigid and more ductile composites.

scholarly journals The Influence of MMA Esterification on Interfacial Adhesion and Mechanical Properties of Hybrid Kenaf Bast/Glass Fiber Reinforced Unsaturated Polyester Composites

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2276
Author(s):  
Rozyanty Rahman ◽  
Syed Zhafer Firdaus Syed Putra ◽  
Shayfull Zamree Abd Rahim ◽  
Irwana Nainggolan ◽  
Bartłomiej Jeż ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Glass Fiber ◽  
Interfacial Adhesion ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Unsaturated Polyester ◽  
Research Work ◽  
Tensile Fracture ◽  
Kenaf Bast

The demand for natural fiber hybrid composites for various applications has increased, which is leading to more research being conducted on natural fiber hybrid composites due to their promising mechanical properties. However, the incompatibility of natural fiber with polymer matrix limits the performance of the natural fiber hybrid composite. In this research work, the mechanical properties and fiber-to-matrix interfacial adhesion were investigated. The efficiency of methyl methacrylate (MMA)-esterification treatments on composites’ final product performance was determined. The composite was prepared using the hand lay-up method with varying kenaf bast fiber (KBF) contents of 10, 15, 20, 25, 30, 35 (weight%) and hybridized with glass fiber (GF) at 5 and 10 (weight%). Unsaturated polyester (UPE) resin and methyl ethyl ketone peroxide (MEKP) were used as binders and catalysts, respectively. Scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR) were used to examine the effects of MMA-esterification treatment on tensile strength and morphology (tensile fracture and characterization of MMA-esterification treatment) of the composite fabricated. The tensile strength of MMA-treated reinforced UPE and hybrid composites are higher than that of untreated composites. As for MMA treatment, 90 min of treatment showed the highest weight percent gain (WPG) and tensile strength of KBF-reinforced UPE composites. It can be concluded that the esterification of MMA on the KBF can lead to better mechanical properties and adhesion between the KFB and the UPE matrix. This research provides a clear reference for developing hybrid natural fibers, thus contributing to the current field of knowledge related to GF composites, specifically in transportation diligences due to their properties of being lightweight, superior, and involving low production cost.

Effect of Reinforcements on Mechanical Properties of Nickel Alloy Hybrid Metal Matrix Composites Processed by Sand Mold Technique

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Kumaraswamy Jayappa ◽  
Vijaya Kumar ◽  
Gange Gowda Purushotham
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Hybrid Composites ◽  
Research Work ◽  
Weight Percent ◽  
Matrix Composites ◽  
Hybrid Metal Matrix Composites ◽  
Ni Alloy

Hybrid Metal Matrix Composites (HMMCs) have gained wide applications in aerospace, marine, and domestic areas because of its significant properties relative to external forces and enabling environment. In present research work, Ni-alloy selected as a matrix and Al2O3 of 40–80 μm and TiO2 of 1–5 μm were selected as reinforcements. The composites were prepared by keeping 9 wt. % of TiO2 as unvarying and Al2O3 is varied from 3 weight % to 12 weight % in steps of 3 weight %. Induction furnace is used for the casting of composites and mixing is done by using mechanical stirring at 160 rpm for a time period of 5 min. The prepared composites are then tested for their tensile and hardness as per the ASTM standards. The Scanning Electron Microscopy was used for microstructural study. From experimentation, it was observed that increment in the weight percentage of Al2O3 with constant TiO2 increases the mechanical properties of hybrid composites and proper stirring improves homogeneity in the composite material. The test results show that the addition of Al2O3 up to 9 weight percent increases in tensile strength compared to Ni alloy and tensile strength slowly decreases with the addition of Al2O3 and that the hardness values are directly proportional to the weight percent of the addition of Al2O3 / TiO2.

Correlation of structural and mechanical properties for Al-Al2O3-SiC hybrid metal matrix composites

2021 ◽  
pp. 002199832110115
Author(s):  
Naseem Ahamad ◽  
Aas Mohammad ◽  
Moti Lal Rinawa ◽  
Kishor Kumar Sadasivuni ◽  
Pallav Gupta
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Structural Characteristics ◽  
Base Material ◽  
Physical Property ◽  
Weight Percentage ◽  
Al Matrix

The aim of the present paper is to examine the outcome of Al2O3-SiC reinforcements on structural and mechanical behavior of Al matrix based hybrid composites. Al-Al2O3-SiC hybrid composite has been developed through stir casting with addition of ceramics i.e. Al2O3-SiC (2.5 wt.%, 5.0 wt.%, 7.5 wt.% and 10.0 wt.%) in relative and symmetrical proportion. The structural characteristics, i.e. phase, microstructure, EDS; physical property i.e. density and the mechanical properties, i.e. hardness, impact strength and tensile strength of fabricated specimens have been investigated. XRD represents the transitional phase formation among Al base material and Al2O3-SiC ceramic phases with inter-atomic bonding between them. SEM reveals that the Al2O3-SiC fragments has distributed symmetrically in Al matrix. EDS spectrum of various samples are in confirmation with the XRD results. Density of hybrid composite reduces with increase in weight percentage of ceramic reinforcements i.e. Al2O3-SiC because ceramic particle gains low density after preheating. Hardness of hybrid composites increases upto 5 wt.% variation of ceramic reinforcements i.e. Al2O3-SiC after that it decreases. Impact strength of hybrid composite has been increased with an increase in weight percentage of ceramic. Al-2.5 wt.% Al2O3-2.5 wt.% SiC shows maximum ultimate tensile strength. It is expected that the prepared hybrid composites will be useful for fastener studs.

scholarly journals Mechanical and Physical Properties of Polyester Reinforced Glass Fibre/Orange Peel Particulate Hybrid Composite

2019 ◽  
Vol 7 (1) ◽  
pp. 18-26
Author(s):  
Rabiu Onoruoiza Mamman ◽  
Aliyu Mohammed Ramalan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Bending Strength ◽  
Unsaturated Polyester ◽  
Glass Fibers ◽  
Physical And Mechanical Properties ◽  
Orange Peel ◽  
Constant Weight ◽  
Weight Percentage ◽  
Particulate Reinforcement

This study was focused on the development of hybrid composed using orange peel particulate dispersed in an unsaturated polyester resin reinforced with chopped strands of E-glass fibers. Orange peel particulate of about 350µm sieve size, of varying weight percentage (3, 6, 9,12 and 15) wt.% and E-glass fiber of constant weight percentage 25.1wt% was used as reinforcements in a polyester matrix. The effect of the orange peel particulate on the physical and mechanical properties of the resulting composite such as tensile strength, bending strength, impact strength and hardness strength was investigated. The results showed remarkable improvement in mechanical properties with increase in percentage of particulate reinforcement. Tensile strength varies from 50.0 to 62.6 MPa, Hardness values varies between 28.6 and 40.8HRB, Impact energy at room temperature, varies between 5.0 to 7.4 Joules, as a function of fiber weight fractions and the flexural strength varies from 74.0 to 85.2 MPa. The best mechanical properties were obtained at 15 Wt.% particulate reinforcements. The results of the physical tests show that the water absorption increases as the weight percentage of the particulate reinforcement increases and the same condition also holds for the density.

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.

Experimental Investigation of Mechanical Properties of Ceramic Reinforced Al-7075 Metal Matrix Hybrid Composites

2020 ◽  
Vol 979 ◽  
pp. 34-39
Author(s):  
K. Sudhindra Srinivas ◽  
M. Murali Mohan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Metal Matrix ◽  
Hybrid Composites ◽  
Experimental Studies ◽  
Stir Casting ◽  
Matrix Composites ◽  
Weight Percentage ◽  
Particulate Metal ◽  
Al 7075

The epidemic adoption of particulate metal matrix composites (MMCs) for engineering applications has been delay by the high cost of producing components of even minimally complex shape. The aluminum-based composites find its applications widely in transport, aerospace, marine, automobile and mineral processing industries, owing to their improved strength, stiffness and wear resistance properties. This paper, presents the overview of the addition of different reinforcements to aluminium alloy. The reinforcements are added to the Al7075 by using stir casting method. Effect of these reinforcements like Titanium carbide (TiC) and silicon (Si) influencing on the mechanical properties like tensile strength, hardness was studied. Research relevant to these factors which influence particles distribution were noticed by conducting the experimental studies of Al7075 hybrid composites.The mechanical properties and the microstructure of Al–TiC-Si metal matrix composite has shown the significant improvement in Hardness and Tensile strength, with increase in TiC and Si particles in weight percentage of composites.

Effect of TiO2 Nanofillers on Mechanical Properties of PVC/ENR/TiO2 Nanocomposites

2014 ◽  
Vol 911 ◽  
pp. 105-109 ◽  
Author(s):  
Nur Azrini Ramlee ◽  
C.T. Ratnam ◽  
N.H. Alias ◽  
T.A. Tengku Mohd
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Uv Light ◽  
Research Work ◽  
Physical And Mechanical Properties ◽  
Shore Hardness ◽  
Long Term Stability ◽  
Insignificant Difference ◽  
Irradiation Dose Rate

Addition of nanoparticles currently in polymer blends has brought tremendous transformation in polymer engineering field. Incorporation of TiO2 nanofillers is believed to enhance the physical and mechanical properties of PVC/ENR blends due to its excellent characteristics including non-toxicity, long term stability and UV light discoloration resistance. The main objective of this research work is to introduce titanium dioxide (TiO2) nanofillers in a range of 0 - 6 phr into polyvinyl chloride (PVC) and epoxidized natural rubber (ENR) blends. Modification on mechanical properties of PVC/ENR blends has successfully been carried via irradiation crosslinking technique. The addition of TiO2 nanofillers has improved the tensile strength and hardness of the nanocomposites. Nevertheless, at higher loading of 6 phr, the results obviously showed an insignificant difference of performances for both tensile strength and shore hardness properties. Upon radiation of 50 kGy, the increase in Ts of the PVC/ENR blends with addition of 4 phr TiO2 was found to be optimum before the Ts value drops with higher exposure to irradiation dose rate. Gel fraction of irradiated PVC/ENR/TiO2 nanocomposites indicates the nanocomposites are crosslinked upon electron beam irradiation. Degree of crosslink was also increased with the addition of 4 phr and 6 phr TiO2.

Mechanical and Tribological Properties of A7075/ SiC/ B4C Hybrid Composite Fabricated by Stir and Squeeze Casting Method

2021 ◽  
Vol 882 ◽  
pp. 77-88
Author(s):  
K. Sekar
Keyword(s):  
Tensile Strength ◽  
Uniform Distribution ◽  
Squeeze Casting ◽  
Hybrid Composites ◽  
Base Alloy ◽  
Casting Process ◽  
Dry Sliding Wear ◽  
Weight Percentage ◽  
Micro Particles ◽  
Mild Wear

Aluminium alloys are having lightweight, high strength, good corrosive resistance, and toughness. In this paper, A7075/B4C/SiC Hybrid Composites fabricated with different wt. % of reinforcement materials by using stir and squeeze casting process. The SEM Microstructure have shown that uniform distribution of reinforcement particles in the A7075 matrix reinforced with 1 % wt. % B4C and 1 % wt. % SiC. The Mechanical properties of A7075/B4C/SiC Hybrid Composites were studied Composite A7075/B4C/SiC reinforced with 1 % wt. B4C and 1 % wt. SiC has shown more compressive and tensile strength compared to base alloy. The compressive strength of the composite increased 39.73 % and the tensile strength is increased 36.67 % compared to base alloy. From the dry sliding wear studies, the Composite with 1 B4C wt. % have shown less weight loss and coefficient of friction at all conditions due to the uniform distribution of the micro-particles within the matrix surfaces. Worn surface morphology has revealed that severe wear of A7075 base alloy became mild wear by preparing composite with 1 % wt. SiC, 0.5 wt. % B4C and then mild wear became less wear with shallow grooves by increasing reinforcement weight percentage of B4C from 0.5 to 1.

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