Role of SiC on Mechanical, Tribological and Thermal Expansion Characteristics of B4C/Talc-Reinforced Al-6061 Hybrid Composite

Kumar, C. Ramesh; Malarvannan, R. Ravi Raja; Jaiganesh, V.

doi:10.1007/s12633-019-00243-0

Cited by 40 publications

(9 citation statements)

References 20 publications

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“…The experimental validation test has been conducted at the optimal set of parameters, and specific wear rate was further calculated. The specific wear rate for this test was achieved as 0.205 × 10 −5 mm 3 /N-m, which shows a better performance than elsewhere [81,82]. The comparison of the predicted and experimental SWR is shown in Table 9.…”

Section: Validationmentioning

confidence: 78%

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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Section: Validationmentioning

confidence: 78%

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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“…Strengthening Mechanism: Increasing the values of mechanical properties for Al6061 and nano silica composite was observed in experimental, and those values were theoretically analyzed with Orowan strengthening mechanism. The enhancement of properties was observed due to the obstruction of crack propagation under loading conditions [32][33][34][35]. The obstruction of crack was due to the grain re nement and dislocation movement during compaction and sintering process, it implies that Orowan mechanism has effect in this aspect.…”

Section: Hardnessmentioning

confidence: 99%

Influence of Nano-Silica in Al6061 Composites on Mechanical and Material Properties prepared through Powder Metallurgy

Kumar¹,

Nath²,

Babu³

2021

Preprint

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The influence of composites preparation methods in the aerospace industry has evolved quite new challenges achieving better and desired properties. In this context, this work deals with the preparation of nano silica-based composite through the powder metallurgy technique. The composites prepared were tested for material characterization with morphological, X-Ray diffraction, and mechanical characterization with hardness, tensile strength, density, and porosity tests. The results revealed that the nano-silica has interfacial interaction with aluminum alloy. The strength of Al6061 nano-silica composite has the effect of sintering and compaction processes. Crystallization of Al6061 composite has been influenced by sintering time for nano-silica reinforcement. A compound was formed during the ball milling process during the blending of Al6061 and nano-silica powders was examined and detailed through material characterization. It revealed the structure as a mesoporous structure which created a route for better-impregnated bearing material. Al6061 nano-silica impregnated bearing with porous structure holds the lubricating fluid which is serving the purpose of self-lubrication and self-cooling by dissipating the heat generated during the running conditions. The strengthening mechanism like the Orowan effect and dislocation density strengthening enhanced the process and revealed the effect on nano-silica content. The wettability of silica was improved through binder in PM and the preheating process of powders. Hardness incremented up to 21% of base alloy through the PM technique.

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“…Even though these composites possess good wear resistance, they are subjected to oxidation or corrosion due to prolonged usage and exposure to the atmosphere. To overcome this issue, naturally available minerals such as Bauxite [ 7 ], Rutile [ 8 ], Talc [ 9 ], and Mica [ 10 ] can be used as reinforcements. Sillimanite (Al 2 SiO 5 ) is one such mineral that has high hardness, modulus, corrosion resistance, thermal stability, and a low thermal expansion coefficient [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of the Surface Topography and Tribological Properties of Reinforced Aluminum Matrix Composite

Niemczewska-Wójcik

Pethuraj²,

Uthayakumar

et al. 2022

Materials

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Due to their excellent synergistic properties, Aluminum Matrix Composites (AMC) have achieved a high degree of prominence in different industries. In addition to strength, the wear resistance of materials is also an important criterion for numerous applications. The wear resistance depends on the surface topography as well as the working conditions of the interacting parts. Therefore, extensive experiments are being conducted to improve the suitability of engineering materials (including AMC) for different applications. This paper presents research on manufactured aluminum metal matrix composites reinforced with 10 wt.% of Al2SiO5 (aluminum sillimanite). The manufactured and prepared samples were subjected to surface topography measurements and to tribological studies both with and without lubricant using a block-on-ring tester. Based on the results, analyses of the surface topography (i.e., surface roughness parameters, Abbott–Firestone curve, and surface defects) as well as of the tribological characteristics (i.a. friction coefficient, linear wear, and wear intensity) were performed. Differences in the surface topography of the manufactured elements were shown. The surface topography had a significant impact on tribological characteristics of the sliding joints in the tests where lubrication was and was not used. Better tribological characteristics were obtained for the surfaces characterized by greater roughness (determined on the basis of both the profile and surface texture parameters). In the case of tribological tests with lubrication, the friction coefficient as well as the wear intensity was significantly lower compared to tribological tests without lubrication. However, lower values of the friction coefficient and wear intensity were still recorded for the surfaces that were characterized by greater roughness. The obtained results showed that it is important to analyze the surface topography because surface characteristics influence tribological properties.

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Role of SiC on Mechanical, Tribological and Thermal Expansion Characteristics of B4C/Talc-Reinforced Al-6061 Hybrid Composite

Cited by 40 publications

References 20 publications

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

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

Influence of Nano-Silica in Al6061 Composites on Mechanical and Material Properties prepared through Powder Metallurgy

Characteristics of the Surface Topography and Tribological Properties of Reinforced Aluminum Matrix Composite

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