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Multi-Response Optimization Of High Speed Turning Parameters Of Superalloy Inconel 718 Material Using Taguchi Method Based Grey Relational Analysis

Sathyanarayana B*, G. Ranga Janardhana**, D. Hanumantha Rao***

* Department of Mechanical Engineering, VNR Vignana Jyothi Institute of Engineering & Technology, Hyderabad, India.

** Principal, College of Engineering, J N T U, Vizayanagaram, India.

*** Professor, Department of Mechanical Engineering, MVSR Engineering College, Hyderabad, India.

Periodicity:May - July'2011
DOI : https://doi.org/10.26634/jme.1.3.1492

Abstract

Nickel-based superalloy, Inconel 718 is widely used in aircraft industry due to its exceptional thermal resistant retaining mechanical properties up to 700°C. On the other hand, it is very difficult to machine, due to their high shear strength, work hardening tendency, highly abrasive carbide particles, tendency to weld and form build-up edge and low thermal conductivity. This paper presents a hybrid optimization approach for determination of the optimum turning process parameters which minimize the Surface Roughness and Tool flank wear together in CNC High Speed turning of Inconel 718 nickel based super alloy using Sandvik make uncoated tungsten carbide cutting tool SNMG 120408 H13A. An exhaustive experimental study has been conducted with various process parameters like speed, feed and depth of cut with three levels each. Thus, an orthogonal array L₉ has been adopted to accommodate the factors at their respective levels. The surface roughness and tool flank wear are considered as process performances. A multi-response optimization has been carried out by using Taguchi method based Grey Relational Analysis (GRA). Also the significant process parameters have been found out for the above process optimization by performing an ANOVA. Confirmation tests with the optimal levels of cutting parameters are carried out in order to illustrate the effectiveness of the method. Validations of the modeled equations are proved to be well within the agreement with the experimental data.

Keywords

Inconel 718, Multi-Response Optimization, Grey Relational Analysis, Taguchi method, ANOVA.

How to Cite this Article?

B. Satyanarayana, G. Ranga Janardhana and D. Hanumantha Rao (2011). Multi-Response Optimization Of High Speed Turning Parameters Of Superalloy Inconel 718 Material Using Taguchi Method Based Grey Relational Analysis. i-manager’s Journal on Mechanical Engineering, 1(3), 49-60. https://doi.org/10.26634/jme.1.3.1492

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