Volume 8, No. 2, March 2019

General Information

  • ISSN: 2278-0149 (Online)
  • Abbreviated Title:  Int. J. Mech. Eng. Robot. Res.  
  • Editor-in-Chief: ​Prof Richard (Chunhui) Yang, Western Sydney University, Australia
  • Associate Editor: Prof. B.V. Appa Rao, Andhra University; Prof. Ian McAndrew, Capitol Technology University, USA
  • Managing Editor: Murali Krishna. B
  • DOI: 10.18178/ijmerr
  • Abstracting/Indexing: Scopus (since 2016), CNKI, Google Scholar, Crossref, etc.
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International Journal of Mechanical Engineering and Robotics Research
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Modeling and Optimization of Machining High Performance Nickel Based Super Alloy Nimonic C-263 Using Die Sinking EDM

Rama Bhadri Raju Chekuri 1, Ramakotaiah Kalluri 1, Jamaleswara Kumar Palakollu 1, and Rajesh Siriyala 2
1. Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur District, India
2. Sagi Rama Krishnam Raju Engineering College, Bhimavaram, A.P, 534204, India

Abstract—EDM is a renowned non-conventional machining process capable of producing precise tolerance on difficult to cut materials. However, machinability aspects of prodigious materials like Nimonic C-263 are yet to be explored. Thus, in the current study, various die sinking EDM process parameters are analyzed with reference to responses like material removal rate, tool wear rate, surface roughness and radial over cut on Nimonic C-263 super alloy. The machining parameters considered are Current (C), Pulse on-time (Ton), Pulse off-time (Toff) and Flushing Pressure (FP). The response variables observed are Material Removal rate (MRR), Tool Wear Rate (TWR), Surface Roughness (SR) and Radial Overcut (ROC). TAGUCHI L25 orthogonal array is considered for experimental design and fine grained graphite as tool electrode during experimentation. Multiple regression analysis is performed on each response to develop mathematical model which are later used to predict the responses using optimal parameters. The results revealed, current as an influential process parameter affecting all the responses. The models are verified by validation experiments.

 
Index Terms—Electrical discharge machining, Nimonic C-263, metal removal rate, tool wear rate, surface roughness, radial over cut, Taguchi method and regression models

Cite: Rama Bhadri Raju Chekuri, Ramakotaiah Kalluri, Jamaleswara Kumar Palakollu, and Rajesh Siriyala, "Modeling and Optimization of Machining High Performance Nickel Based Super Alloy Nimonic C-263 Using Die Sinking EDM," International Journal of Mechanical Engineering and Robotics Research, Vol. 8, No. 2, pp. 196-201, March 2019. DOI: 10.18178/ijmerr.8.2.196-201