Machinability of titanium alloy through electric discharge machining

Ahmed, Naveed; Ishfaq, Kashif; Moiduddin, Khaja; Ali, Rizwan; Al-Shammary, Naif

doi:10.1080/10426914.2018.1532092

Cited by 70 publications

(36 citation statements)

References 19 publications

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“…Higher MRR is achieved using brass tube than the copper tube, as the presence of Niobium aids the process (keeping the conductivity factor higher). Furthermore, Ti-6Al-4V with brass and copper tubes yields higher MRR than the Inconel 718 with brass and copper tubes [2,7,8], as the occurrence of abnormal sparking (like arcing) and more number of carbon particles in rapid-EDM of Inconel 718 are noticed which is shown in Fig. 7.…”

Section: Effect Of Machining Parameters On Mrrmentioning

confidence: 91%

“…11. The OC varies in the order of capacitance followed by current, off-time and on-time for Ti-6Al-4V [2,3,[5][6][7]. Moreover, OC varies in the order of current followed by capacitance, off-time and on-time for Inconel 718 [11,12].…”

Section: Effect Of Machining Parameters On Ocmentioning

confidence: 96%

“…The TWR mainly depends on the current and the order of significance of other machining parameters for each of the combinations of the workpiece, and tool materials are indicated in Table 6. In rapid-EDM, the TWR increases with an increase in current and capacitance attributing to the raise in temperature [1][2][3][4][5][6]. The frequency discharge is higher in copper tubes in comparison with brass tubes.…”

Section: Effect Of Machining Parameters On Twrmentioning

confidence: 99%

“…This is a dominating factor in the reduction in TWR, as copper tubes can withstand higher melting temperatures compared to brass tubes. Furthermore, in rapid-EDM of superalloys using copper tubes, an on-time increase will decrease the TWR initially, but further it starts increasing due to contact and adhesion of eroded particles onto the tool surface [2,8]. In rapid-EDM, off-time increase will reduce TWR due to proper removal of debris in a continuous cycle.…”

Section: Effect Of Machining Parameters On Twrmentioning

confidence: 99%

“…Primarily, superalloys offer extraordinary mechanical properties, high strength-to-weight ratio, high corrosion resistance and surface stability in hot and cold working temperature. These properties have led to broad applications in aerospace, automobile, chemical, power plant, marine and medical industries [1][2][3][4]. However, during machining of superalloys using conventional methods witnessed drawbacks, in the form of excessive tool wear causing an adhesion phenomenon with the tool material, minimal heat transfer during the machining cycle.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Analysis of high aspect ratio small holes in rapid electrical discharge machining of superalloys using Taguchi and TOPSIS

Rajamanickam

Prasanna

Sastry

2020

J Braz. Soc. Mech. Sci. Eng.

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The main aim of this paper is to perform high aspect ratio small holes using rapid electrical discharge machining (rapid-EDM) of superalloys, namely Ti-6Al-4V and Inconel 718 with the tool materials like brass tubes and copper tubes. For employing the above-said materials, the performance characteristics such as material removal rate (MRR), tool wear rate (TWR) and overcut (OC) have been studied. In these investigations, DOE-Taguchi's L9 orthogonal array has been utilized to build an experimental layout with the machining parameters such as current, on-time, off-time and capacitance. From the analysis, it is confirmed that there was a 40% increase in MRR, 282% decrease in TWR and 56% decrease in OC for rapid-EDM of Ti-6Al-4V material using the brass tubes than the copper tubes. Further, it is also validated that there is a 61% increase in MRR, 6% drop of TWR and 33% increase in OC for rapid-EDM of Inconel 718 material using brass tubes than the copper tubes. So, this comparative study has concluded that the machining of Ti-6Al-4V using brass tube has produced a maximum of MRR and minimum of TWR and OC. In Taguchi analysis, the individual effect of machining parameters on MRR, TWR and OC was studied. In addition, optimum combinations of machining parameters for MRR, TWR and OC were also discussed. Furthermore, multi-objective optimization was executed using TOPSIS to find good combination of machining parameters.

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Section: Effect Of Machining Parameters On Mrrmentioning

confidence: 91%

Section: Effect Of Machining Parameters On Ocmentioning

confidence: 96%

Section: Effect Of Machining Parameters On Twrmentioning

confidence: 99%

Section: Effect Of Machining Parameters On Twrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Analysis of high aspect ratio small holes in rapid electrical discharge machining of superalloys using Taguchi and TOPSIS

Rajamanickam

Prasanna

Sastry

2020

J Braz. Soc. Mech. Sci. Eng.

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A Sustainable Die-Sinking Electrical Discharge Machining of Ti6Al4V Using Jatropha Bio-Dielectric

Das¹,

Paul²,

Doloi³

2022

Lecture Notes in Mechanical Engineering

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Surface modification of Ti-6Al-4 V by gas–liquid mixed EDM

Zhang

Wang

et al. 2022

Int J Adv Manuf Technol

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Ti-6Al-4V alloy is widely used in many elds due to its excellent properties. However, its further applications is limited by its low hardness and poor wear resistance. In this paper, gas-liquid mixed electrical discharge machining (EDM) process was applied for surface modi cation of Ti-6Al-4V alloy.The multi-hole electrode was adopted to ow nitrogen to mix nitrogen with special spark oil. The effect of different parameters (peak current and pulse duration) on surface morphology, cross section morphology, micro hardness and wear resistance were investigated. The results indicated that the gas-liquid mixed EDM process has better performance on sample surface with fewer pores and shallow craters. A continuous and thick recast layer was obtained by gas-liquid mixed EDM process and N element was migrated to the sample surface from nitrogen gas. The XRD results demonstrated that TiN hard phase was formed on the sample surface, thus the micro hardness was nearly three times higher than that of the matrix, reaching 1329.5HV, and the wear resistance is improved accordingly. The surface of Ti-6Al-4V alloy was modi ed by gas-liquid mixed EDM process.formation of TiN hard layer on the sample surface, which has better wear resistance [29, 30]. This is consistent with the improvement of micro hardness discussed in Section 3.4. ConclusionsIn this paper, the machining properties of Ti-6Al-4V ally by gas-liquid mixed EDM process were investigated. The main conclusions can be drawn:1. The gas-liquid mixed EDM process can obtain smoother surface morphology with less pores as compared with EDM process.2. The recast layer of gas-liquid mixed EDM is more continuous and thicker than that of EDMed surface and its microstructure is mainly granular and dendritic.3. X-ray diffraction analysis reveals that the hard phase of TiN is formed on the gas-liquid mixed EDMed surface. The average surface micro hardness increases from 315 HV to 1329.5 HV.4. The micro hardness of gas-liquid mixed EDMed surface is improved by almost 65.9% as compared to that of EDM. With the increase of depth from the surface, the micro hardness decreases gradually until it reaches the matrix hardness.5. Wear test shows that the gas-liquid mixed EDM process enhances the wear resistance of titanium alloy and realizes the surface modi cation of titanium alloy.

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Machinability of titanium alloy through electric discharge machining

Cited by 70 publications

References 19 publications

Analysis of high aspect ratio small holes in rapid electrical discharge machining of superalloys using Taguchi and TOPSIS

Analysis of high aspect ratio small holes in rapid electrical discharge machining of superalloys using Taguchi and TOPSIS

A Sustainable Die-Sinking Electrical Discharge Machining of Ti6Al4V Using Jatropha Bio-Dielectric

Surface modification of Ti-6Al-4 V by gas–liquid mixed EDM

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