Characteristic evaluation of Al2O3/CNTs hybrid materials for micro-electrical discharge machining

Tak, Hyun-Seok; Ha, Chang-Seung; Lee, Hojun; Lee, Hyungwoo; Jeong, Young-Keun; Kang, Myung Chang

doi:10.1016/s1003-6326(11)61055-8

Cited by 28 publications

(5 citation statements)

References 9 publications

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“…Seok et al [9] aimed for characteristic evaluation of (Al 2 O 3 )/ (CNTs) hybrid composites for micro-electrical discharge machining (EDM). Catalytic chemical vapour deposition method was used to produce Alumina matrix composites reinforced with CNTs.…”

Section: Die Sink Edm On Compositesmentioning

confidence: 99%

Electrical Discharge Machining of the Composites- A Literature Review

Prasad¹

2014

IJRET

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The use of unconventional machining techniques in shaping metal matrix composites (MMCs) has generated considerable interest as the manufacturing of complicated die contours. Metal matrix composites are advanced materials having high specific strength, good wear resistance, and high thermal expansion coefficient. Electrical discharge machining is a best process to make complicated shapes on the difficult to machine materials. The current paper presents a review of the research work done in electrical discharge machining (EDM) on MMCs. The review is categorized in to two stages namely wire cut EDM on composites and EDM on composites .This literature review helps to identify the suitable process parameters and their ranges in machining of composites.

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Section: Die Sink Edm On Compositesmentioning

confidence: 99%

Electrical Discharge Machining of the Composites- A Literature Review

Prasad¹

2014

IJRET

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“…The study contributes to expanding the materials available for tool electrodes in EDM, potentially offering advantages in specific machining scenarios. Seok et al [19] investigated the use of hybrid Al2O3/CNT composites for μ-EDM applications. They found that while increasing the CNT content improved the electrical conductivity of the composites, it also led to the formation of CNT tangles, causing challenges in machining accuracy.…”

Section: Introductionmentioning

confidence: 99%

Investigation of effect of thickness in micro drilling of Ti-6Al-4V alloy using tungsten copper electrode

Sawant,

Patil

2024

Eng. Res. Express

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The effectiveness and precision of electric discharge machining (EDM) in fabricating holes in challenging materials rely on the careful choice of suitable tools, materials, and process parameters. Nevertheless, the productivity and material removal rate (MRR) of the EDM process impacted by unstable machining conditions and inadequate removal of debris, especially when drilling holes with high aspect ratios. This study focused on examining how various machining conditions influenced the response variables TWR, MRR, and hole taper (HT) were investigated for with different thickness of plates, namely 0.5 mm(W1), 1 mm (W2), and 1.5 mm (W3) of Ti-6Al-4V. The Taguchi based L9 orthogonal array used to design the experiment and the obtained results were subjected to analysis using Analysis of Variance (ANOVA). The effective implementation of appropriate flushing techniques, efficient debris evacuation, and consistent maintenance of machining conditions resulted in enhanced performance for rotary micro EDM (µ-EDM). However, the µ-EDM process is influenced by numerous operating parameters. The findings revealed that the percentage contribution of capacitance and electrode rotation speed (ERS) is more significant compared to voltage. Specifically, for the W3 workpiece, capacitance displayed utmost MRR 0.01894 mm3/min, which is 51.12% and 63.10% greater than the W1 and W2 workpieces respectively. In contrast, the W1 workpiece exhibited the least TWR of 0.000193 mm3/min, which was 50.61% and 67.24% lower than the W2 and W3 workpieces respectively. The W1 workpiece enhanced accuracy as it significantly reduced the HT as compared to the W2 and W3 workpieces. Scanning Electron Microscopy (SEM) was utilized to investigate how workpiece thickness and process parameters influence the surface quality of micro-holes during manufacturing. Through SEM analysis, present study examined the effects of voltage, capacitance, ERS and thickness of the workpiece on the micro-hole surfaces, enabling a deeper understanding of their impact on the final product's quality.

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“…[6] Al2O3-carbon nanotubes-MgO [7] LM-6 alloy-2wt.% SiC+4wt.% B4C, LM-6 alloy-4wt.% SiC+2wt.% B4C [8] Al 4032-6% TiC-2% h-BN [9] LM13 Al alloy-5wt% TiC-10wt% ZrB2…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, harder materials require a higher pulse current [8]. On the other hand, composites containing electrically conductive materials such as carbon nanotubes lead to violent sparks and lack of dimensional accuracy [7]. To the best of the authors' knowledge, Al-10% SiC micro-SiC nano hybrid composites [4] have not been studied under EDM.…”

Section: Introductionmentioning

confidence: 99%

Thermal modelling and Parametric optimization for Machining of Aluminum (Al-10%SiCmicro-SiCnano) based hybrid composite using Spark Erosion

Arif

Khan

Hasan

2023

Preprint

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In this study, the authors divided the work into two parts. The first part involved the development and validation of a thermal model for Electric Discharge Machining (EDM) using Ansys software. This model took into consideration various factors such as Gaussian heat flux, spark radius, fraction of heat transferred as a equation of pulse on time and pulse current, latent heat in specific heat values and temperature dependent thermal conductivity properties. Three different values of fraction of heat transferred to workpiece (Fc) were used in simulation to determine which one is better at correctly predicting MRR and SR. The second part involved the parametric study of the experimental results using ANOVA, main effect plot and grey relational analysis. The workpiece in this study was Al-based hybrid composites, which were manufactured using stir casting. Three composite materials, Al-10%SiCmicro-3%SiCnano, Al-10%SiCmicro-4.5%SiCnano, Al-10%SiCmicro-6%SiCnano were considered. The EDM process was accomplished using a L9 orthogonal array, and the performance parameters were measured in terms of MRR, TWR, SR, Dilation in hole diameter, and Hole taper. The results showed that the Fc value calculated using the Shabdard's function [1] provided the best prediction of MRR and SR, with a MRR ratio range of 1.20-8.00, followed by Fc taken from Dibitonto [2] (MRR ratio range -0.28-12.95) than Fc calculated from Ming et al. [3] (MRR ratio range 0-18.56). The results showed that the dilation in hole diameter and Hole taper increased with an increase in the percentage of SiC nano-particles, while TWR increased with an increase in the pulse current and Hole taper decreased with increase in pulse on time. The best EDM machining results were obtained at 6A pulse current, 20 pulse on time, and 6% SiC nano-particles in the hybrid composite. A validation experiment was also performed, and it was found that the MRR, dilation in hole diameter, and Hole taper improved at 6% SiC nano-particles, 6A pulse current, and 30 pulses on time.

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Characteristic evaluation of Al2O3/CNTs hybrid materials for micro-electrical discharge machining

Cited by 28 publications

References 9 publications

Electrical Discharge Machining of the Composites- A Literature Review

Electrical Discharge Machining of the Composites- A Literature Review

Investigation of effect of thickness in micro drilling of Ti-6Al-4V alloy using tungsten copper electrode

Thermal modelling and Parametric optimization for Machining of Aluminum (Al-10%SiCmicro-SiCnano) based hybrid composite using Spark Erosion

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