INVESTIGATION ON INFLUENCE OF

ELECTRO DISCHARGE MACHINING

PARAMETERS ON SUPER ALLOYS

Presented by:

Vaishali Prajapati (10PGME013)

Under Guidance of:

Avadhoot U Rajurkar,Associate Professor,Mech. Engg. Dept

SUPERALLOYS

ApplicationsThey are extensively used in Gas turbine engines, Turbocharger engines,Poppet valves for piston engines of diesel & gasoline

type,Rocket motors, Space crafts & Aerospace,Nuclear reactors, Pumps & Tooling,Biomedical,Bomb casing, Heat exchanger Tubing

SUPERALLOYSPropertiesHigh temperature strength through solid solution

strengthening,Oxidation and corrosion resistant by formation of

protective layers,Fatigue life work hardening tendency, Phase stability,Poor machinability,High temperature creep resistanceLow thermal conductivityBiological compatibilityLow weight Resist pitting and degradation allowing

Machining of super alloysWhy EDM ???Conventional machining methods have no

solution,Independent of hardness & toughness of

material,Independent of properties of material,No cutting forces involved,Microstructure alteration can be

prevented by optimum machining parameters,

High accuracy attainable,

Machining of Super alloys Problems while edm of super alloys

(Objectives of Present Work)

Control over machining process,Formation of Recast layer,Unavailability of database for parameter

selection,Retardation of progress in machining,Uncertainty of surface quality,Control over dimensions,

Objectives and MethodologyMethodology

Machining of super alloy by electrodes - Cu, Gr & Cu-W,

Decision of machining strategy and parameter range for decided combinations,

Analysis of surface after machining,Preparation of prediction model for response

parameters,Application of Neural Networks for training

and implementation of prediction model.

Project Plan

ProgressLiterature ReviewMaterial SelectionLocating Suppliers

REFERENCES Ahmet Hascalık & Ulas Caydas, A comparative study of surface integrity of Ti–6Al–4V alloy machined by

EDM and AECG, Journal of Materials Processing Technology, 190 (2007) 173–180

Anil Kumar, Maheshwari Sachin, Sharma Chitra & Beri Naveen, Analysis of Machining Characteristics in Additive Mixed Electric Discharge Machining of Nickel-Based SuperAlloy Inconel 718, Materials and Manufacturing Processes, 26:8, 1011-1018

Bozdana A T, Yilmaz O, Okka M A, Filiz İ H, A comparative experimental study on fast hole EDM of Inconel 718 and Ti-6Al-4V, 5th International Conference and Exhibition on Design and Production of MACHINES and DIES/MOLDS, Aydin, TURKEY

Bilbé T B, McGeough J A & Antonelli M, Investigation of unconventional methods of machining through multilayered material components, www.lifelong.ed.ac.uk/CAPE2011/proc/bilbe.pdf

Garg M P, Jain Ajai, Gian , Investigation of the Effect of Process Parameters in Wire EDM of High Temperature Titanium Alloy 6-2-4-2, Proc. of the 5th International Conference on Advances in Mechanical Engineering (ICAME-2011), June 06-08, 2011, SVNIT, Surat

Md. Ashikur Rahman Khan, M. M. Rahman, K. Kadirgama, M.A. Maleque and Rosli A. Bakar, Artificial Intelligence Model to Predict Surface Roughness of Ti-15-3 Alloy in EDM Process, World Academy of Science, Engineering and Technolog,y 74, 2011 page no.198-202

Muthu Kumar, Suresh Babu, Venkatasamy and Raajenthiren, Optimization of the WEDM Parameters on Machining Incoloy800 Super alloy with Multiple Quality Characteristics, International Journal of Engineering Science and Technology, Vol. 2(6), 2010, 1538-1547

Nevagi S P & Dabade U A, Some Study on Die Sinking EDM of Inconel-718, Proc. of the 5th International Conference on Advances in Mechanical Engineering (ICAME-2011), June 06-08, 2011, SVNIT, Surat

Oguzhan Yilmaz & M. Ali Okka, Effect of single and multi-channel electrodes application on EDM fast hole drilling performance, Int J Adv Manuf Technol, (2010) 51:185–194

REFERENCES

Pecas P & Henriques E, Electrical discharge machining using simple and powder-mixed dielectric: The effect of the electrode area in the surface roughness and topography, Journal of Materials Processing Technology, 200 (2008) 250–258

Prabhu S, AFM surface investigation of Inconel 825 with multi wall carbon nano tube in electrical discharge machining process using Taguchi analysis, ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING, Vol. XI 2011 No. 1

Pradhan B B, Masanta M, Sarkar B R & Bhattacharyya B, Investigation of electro-discharge micro-machining of titanium super alloy, Int J Adv Manuf Technol (2009) 41:1094–1106

Rahman M M, Ashikur Rahman Md. Khan, Kadirgama K, Noor M M and Bakar Rosli A, Modeling of Material Removal on Machining of Ti-6Al-4V through EDM using Copper Tungsten Electrode and Positive Polarity, International Journal of Mechanical and Materials Engineering, 1:3 2010

Salman O¨zlem, M. Cengiz Kayacan, Evolutionary programming method for modeling the EDM parameters for roughness, Journal of Materials Processing Technology, 200 (2008) 347–355

Sharman A R C, Amarasinghe A, Ridgway K, Tool life and surface integrity aspects when drilling and hole making in Inconel 718, Journal of Materials Processing Technology, 200 (2008) 424–432

Tolga Bozdana A, Oguzhan Yilmaz, M. Ali Okka, I. Huseyin Filiz, Mathematical modeling of EDM hole drilling using response surface methodology, www1.gantep.edu.tr/~oyilmaz/Bozdana_AT_021109.pdf

THANK YOU