EXPERIMENTAL AND STATISTICAL ANALYSIS ON MACHINABILITY OF NIMONIC80A SUPERALLOY WITH PVD COATED CARBIDE

Year 2018, Volume: 36 Issue: 4, 1141 - 1152, 01.12.2018

Mehmet Erdi Korkmaz Mustafa Günay

Abstract

Nimonic80A is a new superalloy which is used in aerospace technology due to its resistance against high temperature and oxidation. This study addresses an investigation of machinability outputs on Nimonic80A superalloy, including cutting forces and surface roughness. Turning experiments on different cutting conditions with PVD coated carbide were carried out on CNC lathe to determine the cutting forces and surface roughness. Three different cutting parameters, namely cutting velocity, cutting depth and feed rate are used with three different levels. The effect levels of the cutting parameters are determined with analysis of variance (ANOVA) with 95% confidence level. Then, a regression model is applied to predict the results of cutting forces and surface roughness in the certain range of cutting conditions. The results show that the cutting depth has the highest significance on main cutting force (Fc) and feed force (Ff) while the feed rate has the highest significance on radial force (Fr) and surface roughness (Ra). The cutting velocity has much less effect onto cutting force when it improves surface roughness. Finally, the deviation between experimental and second order regression model results for Fc, Fr, Ff and Ra are calculated as 4.53%, 3.21%, 7% and 9.12%, respectively.

Keywords

Nimonic80A, turning, cutting force, surface roughness, regression model.

References

• ⦁ Kalpakjian S., Schmid S.R., (2003) Manufacturing Processes for Engineering Materials. Prentice Hall, New Jersey, 404-460.
• ⦁ Yurtkuran H., (2013) Modeling of cutting forces and surface roughness of turning of DIN 1.2344 steel, Master Thesis, Karabük University, 40-45.
• ⦁ Zhang H., Li J.K., Guan Z.W. et al, (2018) Electron beam welding of Nimonic 80A: Integrity and microstructure evaluation. Vacuum 151: 266-274.
• ⦁ Korkmaz M.E., Günay M., (2018) Identification of Constitutive Model Parameters for Nimonic 80A Superalloy. Trans. Indian. I. Metals. 71(12):2945-2952.
• ⦁ Makuch N., Kulka M., (2016) Fracture toughness of hard ceramic phases produced on Nimonic 80A-alloy by gas boriding. Ceram. Int. 42(2, Part B):3275-3289.
• ⦁ Thellaputta G.R., Chandra P.S., Rao C.S.P., (2017) Machinability of Nickel Based Superalloys: A Review. Materials Today: Proceedings 4:3712–3721.
• ⦁ Narita, H., (2013) A Study of Automatic Determination of Cutting Conditions to Minimize Machining Cost. Procedia CIRP 7:217 – 221.
• ⦁ Torres-Trevino L.M., Escamilla I., Gonzalez B. et al, (2013) Modeling cutting machining process using symbolic regression α-β. Int J Adv Manuf Technol 67:2351–2366.
• ⦁ Kamaraj A.B., Jui S.K., Cai Z., Sundaram M.M., (2015) A mathematical model to predict overcut during electrochemical discharge machining. Int J Adv Manuf Technol 81:685–691.
• ⦁ Dilbag S.P., Rao, V., (2007) A surface roughness prediction model for hard turning process. Int J Adv Manuf Technol, 32:1115–1124.
• ⦁ Yurtkuran H., Korkmaz M.E., Günay M., (2016) Modelling and Optimization of the Surface Roughness in High Speed Hard Turning with Coated and Uncoated CBN Insert. Gazi University Journal of Science 29(4):987-995.
• ⦁ Kannan A., Esakkiraja K., Nataraj M., (2013) Modeling and Analysis for Cutting Temperature in Turning of Aluminium 6063 Using Response Surface Methodology. J Mech Civil Eng 9(4):59-64.
• ⦁ Yu Z., Gao Q.J., Chen, D.F., (2015) Study on mathematical model of cutting force in micromachining. Int J Model Simul Sci Comput 06:1550039.
• ⦁ Kumar R., Sahoo A.K., Das R.K. et al, (2018) Modelling of Flank wear, Surface roughness and Cutting Temperature in Sustainable Hard Turning of AISI D2 Steel. Procedia Manufacturing 20:406–413.
• ⦁ Boujelbene M., (2018) Investigation and modeling of the tangential cutting force of the Titanium alloy Ti-6Al-4V in the orthogonal turning process. Procedia Manufacturing 20:571–577.
• ⦁ Saini S., Ahuja I.S., Sharma V.S., (2013) Modelling the effects of cutting parameters on residual stresses in hard turning of AISI H11 tool steel. Int J Adv Manuf Technol 65:667-678.
• ⦁ Koyee R.D., Heisel U., Eisseler R., Schmauder S., (2014) Modeling and optimization of turning duplex stainless steels. J Manuf Process 16:451–467.
• ⦁ Teimouri, R., Amini, S., Mohagheghian, N., (2017) Experimental study and empirical analysis on effect of ultrasonic vibration during rotary turning of aluminum 7075 aerospace alloy, J Manuf Process 26,1–12.
• ⦁ Kumar R.., Sahoo A.K., Mishra P.C., Das R.K., Comparative study on machinability improvement in hard turning using coated and uncoated carbide inserts: part II modeling, multi-response optimization, tool life, and economic aspects. Adv Manuf https://doi.org/10.1007/s40436-018-0214-0.
• ⦁ Kosaraju, S., Anne, V.G., (2013) Optimal machining conditions for turning Ti-6Al-4V using response surface methodology. Adv Manuf 1:329–339.
• ⦁ Mishra G., Srivastava A., Verma A.S., Niranjan R.S., (2018) Optimization of the Radial Cutting Force in Turning Operation of Inconel718. Asian J Sci Tech, 09(3):7705-7707.
• ⦁ Yalçın B., (2015) Surface Roughness and Cutting Forces in Turning of Tool Steel with Mixed Ceramic and Cubic Boron Nitride Cutting Tools, T Can Soc Mech Eng, 39(2): 323-336.
• ⦁ Günay M., Korkmaz M.E., Yaşar N., (2017) Finite Element Modeling of Tool Stresses on Ceramic Tools in Hard Turning. Mechanika 23(3):432-440.
• ⦁ Korkmaz M.E., Günay M., (2018) Finite Element Modelling of Cutting Forces and Power Consumption in Turning of AISI 420 Martensitic Stainless Steel, Arab J Sci Eng 43:4863-4870.
• ⦁ Popov A., Dugin A., (2015) Effect of uncut chip thickness on the ploughing force in orthogonal cutting. Int J Adv Manuf Technol 76:1937–1945.
• ⦁ Kalyan C., Samuel G.L., (2015) Cutting mode analysis in high speed finish turning of AlMgSi alloy using edge chamfered PCD tools, J Mater Process Technol 216:146–159.
• ⦁ Waldorf D.J., (2006) A Simplified Model for Ploughing Forces in Turning. J Manuf Process, 8(2):76-82.
• ⦁ Shi Z.Y., Liu Z.Q., Guo Y.B., (2011) Proceedings of the ASME 2011 International Mechanical Engineering Congress & Exposition, IMECE2011, November 11-17, Denver, Colorado, USA.
• ⦁ Yaka, H., Demir, H., Gök, A., (2017) Optimization of the Cutting Parameters Affecting the Surface Roughness on Free Form Surfaces, Sigma Journal of Engineering and Natural Sciences, 35 (2), 323-331.
• ⦁ Penteado R.B., Oliveira R.B.T., Ribeiro M.V., Silva M.B., (2015) Application of Taguchi Method in Turning Process of a Superalloy NIMONIC 80A to Improve the Surface Roughness, Int J Innov Res Eng & Man, 2(5): 81-88.