Measurement of Microchannels Produced in Aa6351/Rutile Composite by Wire-Edm

Sreeraj, P.; Kumaran, S. Thirumalai; Kumar, Satish; Uthayakumar, M.; Pethuraj, M.

doi:10.1142/s0218625x20500341

Cited by 8 publications

(3 citation statements)

References 30 publications

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“…[4]. Precision machining methods for SiC ceramic microstructures mainly include mechanical machining [5,6], micro electric discharge [7], and wet etching technology [8]. However, there exists lots of unacceptable disadvantages on the fabricating of ceramic workpieces into functional microstructures by conventional machining techniques, mainly including severe tool wear, subsurface damage, low material removal rates, insu cient machining quality and so on [9,10].…”

Section: Introductionmentioning

confidence: 99%

Investigation on high-aspect-ratio silicon carbide ceramic microchannel by using waterjet-assisted laser micromachining

Han,

Tong,

et al. 2024

Preprint

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The difficult-to-cut characteristics of silicon carbide (SiC) ceramic has limited its processing quality and forming process of functional surfaces. Comparing to direct laser machining (DLM), waterjet-assisted laser micromachining (WJALM) is an alternative technique for SiC ceramic that is capable of reducing thermal-induced damages. In this paper, high-aspect-ratio (HAR) microchannels are fabricated on silicon carbide ceramic by WJALM, and its effectiveness is verified through comparative experiments with DLM. The effects of parametric combination of waterjet and laser parameters on machining responses of geometric structural features and sidewall surface quality are investigated by controlled variable experiments. Results revealed that HAR microchannels with almost no recast layers could be obtained when SiC workpiece was fabricated by a nanosecond laser under the flowing water medium layer. And higher average laser power of 27W, lower scanning speed of 600m/s and medium waterjet velocity of 12/16m/s contributed to larger aspect ratio, more ablation area and superior sidewall quality of HAR microchannels.

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Section: Introductionmentioning

confidence: 99%

Investigation on high-aspect-ratio silicon carbide ceramic microchannel by using waterjet-assisted laser micromachining

Han,

Tong,

et al. 2024

Preprint

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“…The work identified that the methodology adopted can be successfully utilised for the evaluation process of the Al-GNP composites. Sreeraj et al [19] worked on the wire EDM of Al6351-10% rutile composite for machining of microchannels in the electronic circuits. The work aimed at optimization of the kerf width, kerf depth, and the surface roughness using the Taguchi method and GRA with PCA technique to develop a hybrid evaluation model for the optimization of the output parameters.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Kerf Width and Surface Roughness of Al6351 Based Composite in Wire-Cut Electric Discharge Machining Using Mathematical Modelling

et al. 2022

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The machining of composite materials has been an area of intense research for the past couple of decades due to its wide range of applications, from automobiles to air crafts or from boats to nuclear systems. Non-conventional machining, especially electric discharge machining (EDM), is found to be a good machining option for meeting the required outputs. To overcome the challenges of machining complex shapes, wire electric discharge machining (WEDM) was developed. Al6351 composites was observed to be extensively used in nuclear applications. Therefore, identifying the kerf width and surface roughness are important criteria for the dimensional accuracy of the final product. The present work aims at predicting the behavior of the two major machining parameters which are kerf width and surface roughness of Al6351 composites in wire EDM by creating a mathematical model using ANOVA for different combinations of the reinforcements and comparing the variations in the coefficients for different combinations of reinforcements. The developed model has been validated by conducting similar set of experiments in Al6351-5% SiC-1% B4C hybrid composite. From the work, it was identified that pulse on time and current are the major contributing factor for kerf width and wire feed rate was observed to be contributing to the surface roughness. The validation results show an average variation of 8.17% for kerf width and 11.27% for surface roughness. The work can be successfully utilized for prediction of the kerf width and surface roughness of the composites manufactured with Al6351 as the base matrix material.

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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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Measurement of Microchannels Produced in Aa6351/Rutile Composite by Wire-Edm

Cited by 8 publications

References 30 publications

Investigation on high-aspect-ratio silicon carbide ceramic microchannel by using waterjet-assisted laser micromachining

Investigation on high-aspect-ratio silicon carbide ceramic microchannel by using waterjet-assisted laser micromachining

Prediction of Kerf Width and Surface Roughness of Al6351 Based Composite in Wire-Cut Electric Discharge Machining Using Mathematical Modelling

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

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