Characterization, corrosion and failure strength analysis of Al7075 influenced with B4C and Nano-Al2O3 composite using online acoustic emission

Prema, C. Emmy; Suresh, S.; Ramanan, G.; Sivaraj, M.

doi:10.1088/2053-1591/ab6257

Cited by 14 publications

(9 citation statements)

References 43 publications

(32 reference statements)

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“…This rapid collapse, known as cavitation, generates shock waves and high temperatures within the melt. Furthermore, degassing and particle dispersion were caused by shock waves [19]. During the UST, the tiny hotspots created by cavitation remained just a few nanoseconds within the liquid melt.…”

Section: Fabrication and Testing Of Compositesmentioning

confidence: 99%

“…The argon gas was continually fed into the crucible to prevent a reaction between the molten material and atmospheric gas. The presence of particles significantly increases the viscosity of the molten liquid during sonication [19]. Consequently, to ensure a smoother flow of the melt into the preheated steel die, a higher casting temperature of 800°C was employed as a result of the effective ultrasonic processing [6].…”

Section: Fabrication and Testing Of Compositesmentioning

confidence: 99%

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Mechanical and microstructure behaviour of WSC/SiC/Al composites synthesized with and without ultrasonic treatment

Pragathi

Elansezhian

Sundaram

et al. 2023

Materials Science and Technology

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In this research, aluminium composites were fabricated using two alternative casting methods namely, traditional stir casting and ultrasonic-aided stir casting technique. The aluminium composites were manufactured by reinforcing them with three different concentrations of waste spent catalyst and silicon carbide (0.5, 1.0, and 1.5 wt-%), respectively. The microstructural and mechanical behaviour of aluminium composites synthesised using both methods were studied and compared. The microstructure of the aluminium composite obtained by the stir casting technique with ultrasonic treatment resulted in a homogeneous dispersion of reinforcement particles and grain size refinement. Moreover, the overall test results showed that the ultrasonic-aided stir-casting technique improves the microstructure and mechanical behaviour of the composites when compared to the traditional stir-casting approach.

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Section: Fabrication and Testing Of Compositesmentioning

confidence: 99%

Section: Fabrication and Testing Of Compositesmentioning

confidence: 99%

Mechanical and microstructure behaviour of WSC/SiC/Al composites synthesized with and without ultrasonic treatment

Pragathi

Elansezhian

Sundaram

et al. 2023

Materials Science and Technology

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“…Synthetic ceramics are used as primary reinforcements as they possess a superior strength compared to other types of reinforcements. On the other hand, the secondary reinforcement reduces the cost and the weight of the hybrid composite as they are freely available and have a lower density [16,17]. The combination of synthetic ceramics with industrial waste leads to lightweight, inexpensive, high-strength hybrid composites, which makes them suitable for advanced applications [18,19].…”

Section: Introductionmentioning

confidence: 99%

“…It also shows better interfacial bonding and excellent wear performance when reinforced with aluminum. Moreover, hardness of B 4 C is just below that of diamond (9.5+ in Mohs' scale) and possesses good thermal conductivity of 30-42 Wm −1 K −1 , good thermal stability, a very high melting point of 2,445 • C, and high electrical conductivity of 140(s) at 25 • C [9,17,18,21,22,29,30]. Furthermore, incorporation of boron carbide with Al7075 enhances the specific strength, specific stiffness, mechanical properties, and wear resistance of the composite [23,31].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation, Modeling, and Optimization of Wear Parameters of B4C and Fly-Ash Reinforced Aluminum Hybrid Composite

Sahu

2020

Front. Phys.

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Lightweight and high-wear performance materials are currently in demand for various advanced applications in areas such as aerospace and automobiles. These demands can be achieved by hybrid aluminum matrix composites (HAMCs), as they possess excellent mechanical and tribological properties which can be customized using more than one reinforcement. Boron carbide (8 wt.%) and fly-ash (2 wt.%) reinforced hybrid aluminum 7075 composite was successfully fabricated using a stir-casting route. Wear is a crucible phenomenon that occurs over the interaction of surfaces and affects the performance of the material. To investigate wear behavior of developed HAMC, dry sliding wear tests were conducted based on the central composite design, taking the specific wear rate as a response parameter. Modeling of wear parameters is crucial, as it helps to predict the value of the wear response at the given set of input parameters without performing experimentation. Response surface method (RSM) was used for the modeling of wear parameters to develop an empirical model of specific wear rate in terms of load, sliding speed, and sliding distance. The high value of the coefficient of determination (R 2 = 0.9894) illustrates the goodness of fit of the developed model. Moreover, the optimal condition of wear parameters was determined as 20 N load, 1.5 m/s sliding speed, and 500 m sliding distance; the predicted value of specific wear rate in this set of parameters is 0.2 × 10 −5 mm 3 /N-m. The validation test at optimal conditions was performed and the specific wear rate was found to be 0.205 × 10 −5 mm 3 /N-m, which shows good agreement with the predicted value. The worn-out surface and debris were analyzed using scanning electron microscope (SEM) images and electron dispersive spectrums (EDS) to completely explore the mechanism of wear.

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“…Aluminum possesses striking properties that make it an extremely important engineering material. Some of these properties include high electrical and thermal conductivity and high reflectivity [1,2]. Aluminum owes high corrosion resistance because of the tenacious oxide film (Al 2 O 3 ) which occurs naturally on its surface [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the effect of processing parameters on densification, microstructure and hardness of selective laser melted 7075 aluminium alloy

Mbakaan²,

Barki

2020

Mater. Res. Express

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The 7075 aluminum alloy of the 7xxx series largely used for structures in modern aircraft has been successfully fabricated using selective laser melting (SLM) technology. The morphology of the initial 7075 aluminum alloy powders was characterized by a Zeiss Evo 50 Scanning electron microscope (SEM). Energy Dispersive x-ray (EDX) spectrometer attached to SEM was used as a tool to obtain the chemical composition of the powders. Processing parameters including scan speed, hatch distance and constant laser power (100 and 150 W) effect on densification, microstructure and hardness were investigated. The initial powder particles were found to be elongated and non-spherical and composed of Al, Zn, Mg, Cu, and Ag without Si. The result of the influence of processing parameters on properties of the as-built samples by SLM technology indicates that higher densification of parts can be gained using higher laser power and lower laser scan speed and hatch distance due to significant reduction in the number of pores. Two major types of pores including metallurgical and keyhole pores have been identified with the keyhole pores dominating the samples processed by low laser power of 100 W. The keyhole pores increase in size at a high scan speed and hatch distances. By using higher laser power of 150 W, the keyhole pores reduced significantly while metallurgical pores appear. The result of the hardness test conducted on the samples shows that high values of hardness can be achieved with low scan speed.

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Characterization, corrosion and failure strength analysis of Al7075 influenced with B₄C and Nano-Al₂O₃ composite using online acoustic emission

Cited by 14 publications

References 43 publications

Mechanical and microstructure behaviour of WSC/SiC/Al composites synthesized with and without ultrasonic treatment

Mechanical and microstructure behaviour of WSC/SiC/Al composites synthesized with and without ultrasonic treatment

Experimental Investigation, Modeling, and Optimization of Wear Parameters of B4C and Fly-Ash Reinforced Aluminum Hybrid Composite

Experimental investigation of the effect of processing parameters on densification, microstructure and hardness of selective laser melted 7075 aluminium alloy

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