A Comparative Study of EDD and PM-EDD in Producing Holes in Inconel 718 Alloy

2020 ◽  
Vol 833 ◽  
pp. 48-53
Author(s):  
Rahul Davis ◽  
Abhishek Singh ◽  
Sabindra Kachhap ◽  
Neeraj Nath
Keyword(s):  
Thermal Conductivity ◽  
Comparative Study ◽  
Electric Discharge ◽  
Inconel 718 ◽  
Elevated Temperatures ◽  
Removal Rate ◽  
Chemical Properties ◽  
Tool Electrode ◽  
Inconel 718 Alloy ◽  
Pulse On Time

In recent times, aerospace, chemical industries and nuclear plant have usually used Inconel 718 alloy because of its excellent mechanical and chemical properties at elevated temperatures. It falls under the category of difficult-to-cut materials due to its high toughness, poor thermal conductivity and high hardness. The set-ups for electric discharge drilling (EDD) and powder-mixed electric discharge drilling (PM-EDD) were developed, and experiments were conducted on them separately. This research shows a comparative study amid producing holes by EDD and PM-EDD in Inconel 718 alloy workpiece with copper tool electrode. SiC was used as an abrasive powder because of its better thermal conductivity in order to get properly mixed with dielectric in a separate tank. Output response was assessed in the form of material removal rate, under the influence of discharge current, duty factor, pulse-on-time and tool speed, as the input parameters.

Some Preliminary Experimental Investigations on Inconel-718 Alloy with Rotary Tool-Electrode Assisted EDM

2019 ◽  
Vol 969 ◽  
pp. 650-655
Author(s):  
Rakesh Kumar ◽  
Anand Pandey ◽  
Pooja Sharma
Keyword(s):  
Inconel 718 ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Experimental Investigations ◽  
Tool Electrode ◽  
Machining Performance ◽  
Inconel 718 Alloy ◽  
Study Results ◽  
Pulse On Time ◽  
Tool Rotation

In this paper, some preliminary experimental investigations have been reported for analysing the machining performance characteristics viz. Material Removal Rate (MRR) & Tool Wear Rate (TWR). Electrical Discharge Machining (EDM) of Inconel-718 alloy via helical threaded cryogenically treated rotary copper tool electrode is conducted. Impact of machining factors viz. peak current (Ip), pulse-on time (Ton), tool rotation (Nt) & hole depth (h) were investigated using Taguchi’s L9 (34) Orthogonal Array (OA). Optimum arrangements of factors for greatest MRR & least TWR were found in current study. Results predicts that Ip & Nt are two most affecting machining factors that affects MRR. Whereas Ip & Ton are two most affecting machining factors that affects TWR.

Analysis of Dimensional Accuracy (Over Cut) and Surface Quality (Roughness) in Electrical Discharge Machining of Inconel-718 Alloy

2019 ◽  
Vol 969 ◽  
pp. 644-649
Author(s):  
Rakesh Kumar ◽  
Anand Pandey ◽  
Pooja Sharma
Keyword(s):  
Inconel 718 ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Dimensional Accuracy ◽  
Work Piece ◽  
Tool Electrode ◽  
Affecting Factors ◽  
Inconel 718 Alloy ◽  
Electrical Discharge Drilling ◽  
Pulse On Time

Inconel-718 is a nickel based super alloy (difficult-to-cut material) used in aerospace industry. Analysis of machining performances viz. Over Cut (OC) & Surface Roughness (SR) for Inconel-718 through rotary Cu-pin tool electrode have been carried out. Peak current (Ip), pulse-on time (Ton), tool rotation (Nt) & hole depth (h) were used as input factors in Electrical Discharge Drilling (EDD) of Inconel-718 work-piece. Effect of input parameters on performance characteristics like OC & SR were found by Taguchi’s L9 (34) orthogonal array. It is reveals that Ip & h are most affecting factors that affects OC & SR. The Scanning Electron Microscope image was used to measure diameter of hole on work-piece after machining.

Optimization of Electrical Discharge Machining Process Parameters Using Desirability Approach

2012 ◽  
Vol 159 ◽  
pp. 176-180 ◽  
Author(s):  
P. Sengottuvel ◽  
S. Satish Kumar ◽  
D. Dinakaran
Keyword(s):  
Inconel 718 ◽  
Elevated Temperatures ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Nickel Content ◽  
Machining Process ◽  
Tool Geometry ◽  
Dielectric Fluid ◽  
Desirability Approach ◽  
Pulse On Time

Inconel 718 is a high nickel content super alloy having high strength at elevated temperatures and resistance to oxidation and corrosion. EDM process has many advantages over traditional manufacturing process during the machining of inconel 718. In this study experiments were conducted based on the L16 orthogonal array on inconel 718 material using tungsten-carbide (W-C) electrode tool material with kerosene as a dielectric fluid to determine the optimum EDM parameters along with circle(C), square(S), rectangle(R) and triangle (T) tool geometry which contribute to material removal rate (MRR), tool wear rate (TWR) &surface roughness (SR) in machining of inconel 718. Data were optimized using Desirability approach technique. Experimental results show that the current and pulse on time are most influencing parameters that are directly proportional to MRR and inversely proportional to TWR, SR. The rectangle tool geometry gave better results compared to other geometry

Study of Oxidation Degradation Eosin by Ferrate

2014 ◽  
Vol 989-994 ◽  
pp. 15-18
Author(s):  
Dang Sheng Li ◽  
Xi Liang Chen
Keyword(s):  
Wastewater Treatment ◽  
Comparative Study ◽  
Reaction Temperature ◽  
Elevated Temperatures ◽  
Removal Rate ◽  
Solution Ph ◽  
Oxidation Degradation

This paper presents a comparative study of the performance of ferrate (VI) towards wastewater treatment. The effects of solution pH, reaction temperature and amount of ferrate on the eosin removal rate were investigated. Results demonstrated that increasing the amount of ferrate (VI) and low acidity leads to good removal performance of ferrate towards eosin. So ferrate (VI) is an effective reagent for dyes treatment. The reaction temperature, however, has little influence on the removal rate which may be due to the degradation effects of ferrate at elevated temperatures.

Nano Graphite Powder Assisted Electric Discharge Machining Characteristics of ZM21 Magnesium Alloy

2015 ◽  
Vol 787 ◽  
pp. 406-410
Author(s):  
S. Santosh ◽  
S. Javed Syed Ibrahim ◽  
P. Saravanamuthukumar ◽  
K. Rajkumar ◽  
K.L. Hari Krishna
Keyword(s):  
Magnesium Alloy ◽  
Material Removal Rate ◽  
Electric Discharge ◽  
Material Removal ◽  
Removal Rate ◽  
Machining Parameters ◽  
Electric Discharge Machining ◽  
Zm21 Magnesium Alloy ◽  
Pulse On Time ◽  
Pulse Off Time

Magnesium alloys are used in many applications, particularly in orthopaedic implants are very difficult to machine by conventional processes because of their complex 3D structure and limited slip system at room temperature. Hence there is an inherent need for alternative processes for machining such intricate profiles. Electric Discharge Machining is growing rapidly in tool rooms, die shops and even in general shop floors of modern industries to facilitate complex machining for difficult-to-machine materials and provide better surface integrity. Therefore, the use of electric discharge machining on ZM21 magnesium alloy is attempted in this paper. Nanographite powder is added for machining zone to enhance the electrical conductivity of EDM oil by way it improves the machining performance. Machining parameters such as the current, pulse on time and pulse off time were process parameters to explore their effects on the material removal rate and tool wear rate. It is observed that, an increased material removal rate was due to the enhanced electrical and thermal conductivity of the EDM oil.

Optimization of Electric Discharge Machining Parameters of Al-7%Si-4%Mg with 20% of Red Mud Metal Matrix Composites

2014 ◽  
Vol 941-944 ◽  
pp. 1973-1976
Author(s):  
B. Geetha ◽  
K. Ganesan
Keyword(s):  
Surface Roughness ◽  
Wear Rate ◽  
Tool Wear ◽  
Material Removal Rate ◽  
Electric Discharge ◽  
Material Removal ◽  
Removal Rate ◽  
Tool Wear Rate ◽  
Peak Current ◽  
Pulse On Time

An investigation was carried out to find out the influence of process parameters on surface roughness (SR) and material removal rate (MRR) in electric discharge machine of Al-7%Si-4%Mg with 20% of red mud Metal Matrix Composites since electric discharge machining is a thermo-electric machining process, an electronic die sinking electric discharge machine was used to drill holes in the composite work piece, copper is used as tool material. Experiment was carried out to find surface roughness, material removal rate and tool wear rate by varying the peak current, flushing pressure of dielectric fluid and pulse on time. It was found that the surface roughness of composite metal increases with the increase peak current ,pulse on time and flushing pressure due larger and deeper craters on the drilled surface. It was also found that there was increase in metal removal rate with the increase in peak current and flushing pressure and slightly decreases with the increase in pulse on time due carbon deposits on the electrodes. Experimental analysis is carried using Taguchi’s Design of Experiment method with various parameters like peak current, flushing pressure of dielectric fluid and pulse on time to identify the key factors that influence the surface roughness, material removal rate and tool wear rate. It was found that the peak current was the most significant parameter that influences surface roughness, material removal rate and tool wear rate. The Taguchi experiments results confirm the actual results obtained from the numerical calculation.

Effect of Process Parameters in Electric Discharge Machining of Ti-6Al–4V Alloy by Three Different Tool Electrode Materials

2012 ◽  
Vol 488-489 ◽  
pp. 876-880 ◽  
Author(s):  
Manoj Kumar Kuttuboina ◽  
A. Uthirapathi ◽  
Singaravelu D. Lenin
Keyword(s):  
Process Parameters ◽  
Electrode Material ◽  
Electrode Materials ◽  
Metal Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Copper Electrode ◽  
Tool Electrode ◽  
Good Surface ◽  
Pulse On Time

The effect of process parameters namely peak current, pulse on time and flushing pressure on electrical discharge machining (EDM) of titanium alloy (Ti–6Al–4V) were investigated by using three different tool electrode materials namely copper, brass, and aluminium. Kerosene is used as dielectric. The process parameters for machining Ti6Al4V are varied at three levels by using Taguchi's orthogonal array table. The responses such as Metal Removal Rate (MRR), Tool Wear Rate (TWR), and Surface Roughness (SR) are measured and the most significant parameter was confirmed by ANOVA (Analysis Of Variance). The test result shows that copper electrode material possesses higher MRR, less TWR as compared to brass and aluminium. Brass and copper tools has good surface finish as compared with aluminium. The finest electrode material for machining of Ti6Al4V alpha beta alloy in EDM process was in the order of copper, brass and aluminium.

scholarly journals Comparative Analysis of Machining Characteristics of EDM and ECM during Machining of Ti-6Al-4V

2021 ◽  
Vol 23 (2) ◽  
Author(s):  
Banwait S.S. ◽  
◽  
Sanjay S ◽  
Keyword(s):  
Surface Roughness ◽  
Material Removal Rate ◽  
Electric Discharge ◽  
Material Removal ◽  
Removal Rate ◽  
Electric Discharge Machining ◽  
Pulse On Time ◽  
Surface Finish Effect ◽  
Machining Characteristics

The present work explains the machining of Titanium alloy using Electric Discharge Machining & Electro-Chemical Machining. This work aims to analyze the role of Current, Pulse on Time, Voltage and hence optimize the Material Removal Rate and Surface Roughness in Electric Discharge Machining. In the same way, it also aims to analyze the role of Concentration, Feed, and Voltage and optimize the Material Removal Rate and Surface Roughness in Electro-Chemical Machining. The various approaches like Taguchi & Analysis of Variance are executed to study the performance characteristics of the input parameters on the output parameters. The whole work is followed by a validation test and hence confirming the obtained values. Thus, it reveals the acceptability of the model. The work tells that Material Removal Rate and Surface Finish effect is more in Electro-Chemical Machining as compared to Electric Discharge Machining. For Material Removal Rate, Current and Feed are more responsible parameters for Electric Discharge Machining. In the same way; electrolyte concentration and Feed are more responsible parameters for Electro-Chemical Machining respectively.

scholarly journals Multi-Objective Optimization of Aluminium Powder-mixed EDM process using GRA and TOPSIS Technique based on Fuzzy AHP approach

2021 ◽  
Vol 19 (5) ◽  
pp. 437-447
Author(s):  
Fahad Kazi ◽  
C.A Waghmare ◽  
M.S Sohani
Keyword(s):  
Material Removal Rate ◽  
Electric Discharge ◽  
Material Removal ◽  
Removal Rate ◽  
Fuzzy Ahp ◽  
Dielectric Fluid ◽  
Work Piece ◽  
Electric Discharge Machining ◽  
Aluminium Powder ◽  
Pulse On Time

Electric discharge machining is an advanced machining technique. Spark is initiated between the tool and work piece interface which has a gap between them. Low material removal rate as well as low surface finish is a major concern of this process. Therefore, Powder mixed electric discharge machining is developed. In PMEDM process, powders like silicon, aluminium, chromium, manganese, etc. are circulated along with dielectric fluid in a particular proportion. In this present study, aluminium powder is mixed in the dielectric fluid. The responses such as material removal rate, tool wear rate and surface roughness are measured by considering current, pulse on time and aluminium powder concentration as process parameters. Response surface methodology along with Fuzzy AHP TOPSIS and Grey relational analysis are used for optimization.

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