scholarly journals Effect of Boron Carbide Powder Mixed into Dielectric Fluid on Electrical Discharge Machining of Titanium Alloy

2014 ◽  
Vol 5 ◽  
pp. 1957-1965 ◽  
Author(s):  
Murahari Kolli ◽  
Adepu Kumar
Keyword(s):  
Titanium Alloy ◽  
Boron Carbide ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Dielectric Fluid ◽  
Carbide Powder

scholarly journals Multi-Objective Optimization of Process Parameters for Powder Mixed Electrical Discharge Machining of Inconel X-750 Alloy Using Taguchi-Topsis Approach

2021 ◽  
Vol 71 (1) ◽  
pp. 1-18
Author(s):  
Basha Shaik Khadar ◽  
Raju M. V. Jagannadha ◽  
Kolli Murahari
Keyword(s):  
Boron Carbide ◽  
Process Parameters ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Optimization Technique ◽  
Dielectric Fluid ◽  
Carbide Powder ◽  
Powder Concentration ◽  
Pulse On Time ◽  
Pulse Off Time

Abstract The paper investigates the influence of boron carbide powder (B4C) mixed in dielectric fluid on EDM of Inconel X-750 alloy. The process parameters selected as discharge current (Ip), pulse on time(Ton), pulse off time(Toff), boron carbide(B4C) powder concentration to examine their performance responses on Material Removal Rate (MRR), Surface Roughness(Ra) and Recast Layer Thickness (RLT).In this study, o examine the process parameters which influence the EDM process during machining of Inconel X-750 alloy using combined techniques of Taguchi and similarity to ideal solutions (TOPSIS).Analysis of variance (ANOVA) was conducted on multi-optimization technique of Taguchi-TOPSIS. ANOVA results identified the best process parameters and their percentages. It developed the mathematical equation on Taguchi-TOPSIS performance characteristics results. The multi optimization results indicated that Ip and Toff are more significant parameters; V, and Ton parameters are less significant. Finally, surface structures were studied at optimized EDM conditions by using scanning electron microscope (SEM).

An intelligent approach to optimize the electrical discharge machining of titanium alloy by simple optimization algorithm

2020 ◽  
pp. 095440892096468
Author(s):  
Anshuman Kumar Sahu ◽  
Joji Thomas ◽  
Siba Sankar Mahapatra
Keyword(s):  
Titanium Alloy ◽  
Boron Carbide ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Optimal Solution ◽  
Machining Parameters ◽  
Machining Performance ◽  
Intelligent Approach ◽  
Pulse On Time

Electrical discharge machining (EDM) is a thermo-electrical process that can be conveniently utilized for generating complex shaped profiles on hard-to-machine conductive materials using metallic tool electrodes. In this work, composite tools made of copper-tungsten-boron carbide (Cu-W-B4C) manufactured by powder metallurgy (PM) route are used during machining of titanium alloy (Ti6Al4V). The effect of four input machining parameters viz. current, pulse-on-time, duty cycle and percentage of tungsten and boron carbide on material removal rate (MRR), tool wear rate (TWR) and surface roughness (Ra) is studied. A novel meta-heuristic approach such as simple optimization (SOPT) algorithm has been used for single and multi-objective optimization. The pareto-optimal solutions obtained by SOPT have been ranked by VIKOR method to find out the best suitable optimal solution. Analysis of experimental data suggests vital information for controlling the machining parameters to improve the machining performance.

Surfactant and graphite powder–assisted electrical discharge machining of titanium alloy

2016 ◽  
Vol 231 (4) ◽  
pp. 641-657 ◽  
Author(s):  
Murahari Kolli ◽  
Adepu Kumar
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Graphite Powder ◽  
Recast Layer ◽  
Dielectric Fluid ◽  
Recast Layer Thickness

Surfactant and graphite powder–assisted electrical discharge machining was proposed and experiments were performed on titanium alloy in this investigation. Analysis was carried out to observe changes in dielectric fluid behaviour, material removal rate, surface roughness, recast layer thickness, surface topography and energy-dispersive X-ray spectroscopy. It was found out that the addition of surfactant to dielectric fluid (electrical discharge machining oil + graphite powder) improved the material removal rate and surface roughness. It was noticed to have reduced the recast layer thickness and agglomeration of graphite and sediment particles. Biface material migrations between the electrode and the workpiece surface were identified, and migration behaviour was powerfully inhibited by the mixing of surfactant. Surfactant added into dielectric fluid played an important role in the discharge gap, which increased the conductivity, and suspended debris particles in dielectric fluid reduced the abnormal discharge conditions of the machine and improved the overall machining efficiency.

Formation of Nitrides and Carbides on Titanium Alloy Surface through EDM

2012 ◽  
Vol 576 ◽  
pp. 7-10 ◽  
Author(s):  
Mohammed Baba Ndaliman ◽  
Ahsan Ali Khan ◽  
Mohammad Yeakub Ali
Keyword(s):  
Titanium Alloy ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Surface Characteristics ◽  
Urea Solution ◽  
Dielectric Fluid ◽  
Wear Property ◽  
Surface Wear ◽  
Micro Hardness ◽  
Ceramic Compounds

In this investigation, electrical discharge machining (EDM) was done with Cu-TaC powder metallurgy (PM) electrode and urea solution dielectric fluid. The main objective is to improve the surface wear property of Ti-6Al-4V alloy through the formation of hard ceramic compounds on its surface during EDM. The experiments were conducted with peak current, Ip(3.5, 5.5 A) and pulse duration, ton(3.3, 5.3 µsec) as the machining variables. The outputs investigated are surface characteristics and micro-hardness. The formation of nitrides, carbides and oxides of tantalum and titanium on the EDMed surface was confirmed. The highest micro-hardness of 902.2 Hv was obtained with Ipof 5.5 A and tonof 3.3 µsec.

Parametric Optimization of Boron Carbide Powder Added Electrical Discharge Machining of Titanium Alloy

2014 ◽  
Vol 592-594 ◽  
pp. 678-683 ◽  
Author(s):  
Murahari Kolli ◽  
Adepu Kumar
Keyword(s):  
Titanium Alloy ◽  
Boron Carbide ◽  
Current Pulse ◽  
Discharge Current ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Taguchi Technique ◽  
Discharge Current Pulse ◽  
Powder Concentration ◽  
Pulse On Time

The present study deals with the Taguchi technique applied to determine the optimal process parameters of Boron Carbide (B4C) powder mixed electrical discharge machining (EDM) of Titanium alloy. The performance characteristics like material removal rate (MRR) and surface roughness (SR) were experimentally explored for various input parameters such as discharge current, pulse on time, pulse off time and B4C powder concentration in dielectric fluid. The planned optimal setting parameters were conducted and verified through experiments and analyzed using Taguchi technique. Analysis of variance (ANOVA) revealed that discharge current, pulse on time and B4C powder concentration in dielectric are most important parameters affecting both the performance parameters.

Optimization Electro Discharge Machining of Ti-6Al-4V Alloy with Silicon Carbide Powder Mixed

2012 ◽  
Vol 566 ◽  
pp. 466-469 ◽  
Author(s):  
Mohsen Saboktakin Rizi ◽  
Gholam Reza Razavi ◽  
Mojtaba Ostadmohamadi ◽  
Ali Reza Havaie
Keyword(s):  
Thermal Conductivity ◽  
Silicon Carbide ◽  
Titanium Alloy ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Carbide Powder ◽  
Electric Discharge Machining ◽  
Electro Discharge Machining ◽  
Positive Effect ◽  
Silicon Carbide Powder

The Ti-6Al-4V alloy is the most important and widely used titanium alloy which enjoys the welding, forging and machining capabilities. However brittle at high temperatures and low thermal conductivity caused restrictions to deformation and machining of this alloy. So advanced methods machining such as Electrical discharge machining has been developed for titanium and its alloys. One of the ways to improve the performance of electrical discharge machining method is to add the powder to the dielectric. Depending on the type of powder used the different results are achieved. In this study the effect of silicon carbide powder on electrical discharge machining of titanium alloys has been studied. Results suggest that the addition of silicon carbide powder in an electric discharge machining method reduces the roughness and rate filings will be taken. The experimental results showed that the addition of silicon carbide powder will have a positive effect on reducing corrosion of the electrode.

A Study on Influence of Input Parameters on Surface Roughness in PMEDM Cylindrical Shaped Parts

2021 ◽  
Vol 1018 ◽  
pp. 65-70
Author(s):  
Tran Thi Hong ◽  
Bui Thanh Danh ◽  
Nguyen Van Cuong ◽  
Le Hong Ky ◽  
Nguyen Hong Linh ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Dielectric Fluid ◽  
Carbide Powder ◽  
Improve Quality ◽  
Input Parameters ◽  
Edm Process ◽  
Optimum Input

In electrical discharge machining (EDM) powder material can be mixed into the dielectric fluid to improve quality of machining surface of components. Therefore, finding suitable input parameters of this process becomes an important task. This paper presents a methodology to find the optimum input factors of the EDM process when adding nanosilicon carbide powder into the dielectric fluid for processing cylindrical shaped parts. In this research, the Taguchi method was used for experiment design in order to investigate the effect of the input parameters on the surface roughness. Also, optimum input factors for minimum surface roughness (RS) was proposed. The result from the deviation of SRbetween the analysis and the experiment demonstrates that the optimum input parameters are helpful to predict the value of surface roughness. Therefore, this can increase the economic and technical effectiveness in EDM process.

Performance analysis of Cu-W-B4C composite tool during electrical discharge machining of titanium alloy

2020 ◽  
pp. 095440622095159
Author(s):  
Anshuman Kumar Sahu ◽  
Siba Sankar Mahapatra
Keyword(s):  
Titanium Alloy ◽  
Boron Carbide ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Crack Density ◽  
Tool Material ◽  
Work Piece ◽  
Machining Parameters ◽  
Weight Percentage ◽  
Pulse On Time

Electrical discharge machining (EDM) is broadly used in machining of parts having intricate shapes made of difficult-to-machine materials. During EDM, tool fabrication time through conventional machining processes is generally excessively high. Therefore, alternate tool material and fabrication strategy is sought to reduce machining lead time. In this work, composite tools made of copper, tungsten and boron carbide have been prepared through powder metallurgy (PM) route. The performance of these tools is studied during machining of titanium alloy work piece. The input parameter considered are tool material parameters such as weight percentage of tungsten and boron carbide in the tool and machining parameters like peak current, pulse-on-time and duty cycle. The performance of these tools are evaluated considering the performance measures such as material removal rate (MRR), tool wear rate (TWR), average surface roughness (Ra), surface crack density (SCD), white layer thickness (WLT) and micro-hardness (MH). It is observed that the tool materials have been transferred onto the machined surface forming a hard layer with increased weight percentage of oxygen and carbon during machining. The PM tools exhibit similar performance as solid copper tool with respect to MRR, TWR and surface integrity.

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