STUDY ON THE MACHINABILITY CHARACTERISTICS DURING HIGH-SPEED TURNING OF INCONEL 718 WITH PVD COATED TOOL
Keywords:
Inconel 718, High speed machining, JMP Statistical softwareAbstract
Nickel-based Superalloy, Inconel 718 is difficult-to-cut material due to its properties like low thermal conductivity, work hardening etc. and retains its strength at high temperatures. This paper presents an optimization approach for determination of the optimum cutting parameters which minimize the machinability characteristics such as Surface Roughness and Temperature in High Speed turning of Inconel 718 using SECO make PVD coated tungsten carbide tool SNMG 120408 TS 2000. An exhaustive experimental study has been conducted with various cutting parameters like speed, feed and depth of cut with three levels each. Optimization has been carried out by using Taguchi method. Also the significant cutting parameters have been found out for the 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. JMP statistical software was used to compare the results. Validations of the modeled equations are proved to be well within the agreement with the experimental data.
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References
Loria E A (1992), “Recent Development in the Progress of Superalloy 718”, Journal of Materials Processing Technology, Vol. 44(6), 33–36.
Ezugwu E O, Bonney J and Yamane Y (2003), “An Overview of the Machinability of Aeroengine Alloys”, Journal of Materials Processing Technology, Vol. 134(2), 233–253.
Rahman M, Seah W K H and Teo T T (1997), “The Machinability of Inconel 718”, Journal of Materials Processing Technology, Vol. 63(1-3), 199–204.
Sharman A R C, Amarasinghe A and Ridgway K (2008), “Tool Life and Surface Integrity Aspects When Drilling and Hole Making in Inconel 718”, Journal of Materials Processing Technology, Vol. 200(1-3), 424–432.
Choudhury I A and El-Baradie M A (1998), “Machinability of Nickel-Base Super Alloys: A General Review”, Journal of Materials Processing Technology, Vol. 77(1–3), 278–284.
Choudhury I A and El-Baradie M A (1999), “Machinability Assessment of Inconel 718 by Factorial Design of Experiment Coupled With Response Surface Methodology”, Journal of Materials Processing Technology, Vol. 95(1-3), 30–39.
Liao Y S and Shiue R H (1996), “Carbide Tool Wear Mechanism in Turning of Inconel 718 alloy”, Wear, Vol. 193(1), 16–24.
Abhay Bhatt, Helmi Attia, Vargas R and Thomson V (2010), “Wear mechanisms of WC coated and uncoated tools in finish turning of Inconel 718”, Tribology International, Vol. 43(5-6), 1113–1121.
Phadke M S (1989), “Quality engineering using robust design”, Prentice-Hall, Englewood Cliffs, NJ.
Ross P J (1988), “Taguchi techniques for quality engineering”, McGraw-Hill, New York.
Davim J P (2001), “Journal of Materials Processing Technology”, Vol. 117, 347-353.
Yang W H and Tarng Y S (1998), “Journal of Materials Processing Technology”, Vol. 84, 122-129.
JMP documentation at SAS publishers.
