Ageing Kinetics in Carbon Nanotube Reinforced Aluminium Alloy AA6063

Kashyap, K. T.; Puneeth, K.B.; Ram, A. Vishwath; Koppad, Praveennath G.

doi:10.4028/www.scientific.net/msf.710.780

Cited by 18 publications

(4 citation statements)

References 7 publications

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“…Nanoindentation studies showed increase in the value of Young's modulus by 21% and 22% and nanohardness by 43% and 54% by addition of 1 wt% and 2 wt% to the AA 6061 alloy. Kashyap et al [20] studied the aging behavior of multiwalled carbon nanotubes (MWCNT) reinforced AA6063 nanocomposite synthesized by powder metallurgy technique. With the increase in the MWCNT content, the aging curves showed the faster kinetics owing to generation of dislocations due to coefficient of thermal mismatch.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of copper nanocomposites reinforced with uncoated and nickel coated carbon nanotubes

Koti¹,

George²,

Shakiba³

et al. 2018

FME Transactions

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Carbon nanotubes have emerged as potential reinforcement material for metallic matrices since their discovery in 1991 by Japanese scientist Sumo Iijima. It is observed that carbon nanotubes were comprised of multifunctional properties and were ideal reinforcement material for metallic matrices. In the present work we report the development of carbon nanotubes with multi-walls reinforced commercial purity copper nanocomposites. The carbon nanotubes content was varied from 0.25 to 1.0 wt% in the copper matrix nanocomposites. Here, carbon nanotubes were also nickel coated for improving the interfacial bonding with the copper matrix. In order to obtain the good dispersion of carbon nanotubes in the copper matrix, both materials were subjected to ultrasonication and blending process using ball milling. Further sintered nanocomposites were subjected to upsetting forging process, which involves densification and shape change simultaneously. Microstructure studies were conducted using scanning and transmission electron microscopes to study the dispersion of carbon nanotubes. The effect of carbon nanotubes on the mechanical properties like microhardness and tensile strength of copper matrix nanocomposites is studied in detail.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of copper nanocomposites reinforced with uncoated and nickel coated carbon nanotubes

Koti¹,

George²,

Shakiba³

et al. 2018

FME Transactions

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show abstract

“…Among the widely used micron size particulates to reinforce aluminium matrix were TiB 2 , TiC, Si 3 N 4 , SiC, Al 2 O 3 and B 4 C [1][2][3]. But since last couple of decades lot of research is going on reinforcing them with nanosize materials such as Al 2 O 3 , CNT and graphene [4,5]. Due to their small size and large surface area, these nanosize materials have very high level of interactions at the interface due to which most of the physical and mechanical properties are enhanced.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Studies on Powder Metallurgy and Stir Cast Processed Al7075/SiC Nanocomposites

2019

ijeat

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In present study corrosion studies were conducted on Al7075/SiC nanocomposites processed by powder metallurgy and stir casting techniques. The weight percentage of SiC nanoparticles was varied from 1% to 4% for preparing the nanocomposites. The corrosion studies were conducted by means of salt spray technique by following ASTM B117 standard in which samples were immersed in highly corrosive environment of 3.5% NaCl. The weight losses of Al7075 alloy and its nanocomposites showed that with the increase in test duration from 12 to 96 hours, the weight losses of all nanocomposites increased significantly. Powder metallurgy processed nanocomposites showed higher weight loss when compared to those processed using cast route. Corroded surface analysis revealed pitting corrosion as main corrosion mechanism for all materials processed using both the processing techniques. Overall for as cast materials the localized corrosion in form of micro-pits were observed while in case of powder metallurgy processed materials the corrosion was spread over entire surface

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“…The incorporation of particulate reinforced ceramic hard particles like silicon carbide, boron carbide, aluminum oxides, silicates such as Beryllium aluminum silicates (Be3Al2 (SiO3)6), nickel silicide (Si3N4), magnesium silicide (Mg2Si) etc. into the Al matrix enhance its properties like physical and mechanical properties of the composites and make them a low cost, inherent isotropic and better candidate material for various engineering applications [11,16]. Aluminum alloys are largely reinforced -with ceramic materials which are in the form of micron size particles, fibers, or whiskers.…”

Section: Introductionmentioning

confidence: 99%

Tribological Behavior and Hardness Properties of Heat Treated Al 7075-Beryl-Graphene Hybrid Metal Matrix Composites

Patil*¹,

Haneef²

2019

IJRTE

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The emerging technologies and trends of the present generation require downsizing the unwieldy structures to lightweight structures. Aluminum matrix composites are tailored candidate materials for aerospace applications due to their outstanding greater strength to weight ratio and low wear rate. In this study, Al7075 alloy-Beryl-Graphene hybrid composites are developed by using stir casting process. Graphene weight percentage was varied from 0 wt. % to 2 wt. % in steps of 0.5 wt. %. Whereas for Beryl 6 wt. % is used thorough out the study. The casted specimens were heat-treated at T6 solutionizing temperature of 530±5oC for 8 hours. After the heat treatment the specimen are quenched in boiling Water and Ice. The microstructure of the newly developed hybrid MMCs has been investigated by TEM and SEM. The microstructural study reveals the uniform distribution of reinforcement into matrix materials. The hardness and wear behavior of matrix and hybrid composites before and after heat treatment examined by Brinell hardness test and Pin-on-disc test machine respectively. The heat-treated Al7075-Beryl-Graphene hybrid composites significantly improved the hardness and low wear rate compared to base matrix Al7075 alloy

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Ageing Kinetics in Carbon Nanotube Reinforced Aluminium Alloy AA6063

Cited by 18 publications

References 7 publications

Mechanical properties of copper nanocomposites reinforced with uncoated and nickel coated carbon nanotubes

Mechanical properties of copper nanocomposites reinforced with uncoated and nickel coated carbon nanotubes

Corrosion Studies on Powder Metallurgy and Stir Cast Processed Al7075/SiC Nanocomposites

Tribological Behavior and Hardness Properties of Heat Treated Al 7075-Beryl-Graphene Hybrid Metal Matrix Composites

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