Effect of High Pressure Coolant on Tool Wear Phenomenon during Machining of Titanium Alloy Ti6Al4V

Abstract:

Titanium alloys are referred to difficult-to-cut materials because of its some inferior properties like low thermal conductivity and high chemical reactivity. To improve machinability of these alloys one way is to use cutting fluids which removes the heat generated at the chip tool interface during the machining process. But coolant with low pressure and improper delivery is not able to break the vapor barrier created by high cutting temperature. The present work investigates the effect of using high pressure coolant system (50 Bar) on machinability of Ti6Al4V. The machinability was measured in terms of tool wear. The dominant tool wear mechanism was investigated by using scanning electron microscopy and energy dispersive X-ray analysis of worn out cutting tool surfaces. Abrasion wear on flank face and crater wear on the rake face was observed as a dominant tool wear mechanism. Along with this diffusion of titanium from the work surface to tool face is also confirmed.

• Periodical: Applied Mechanics and Materials (Volume 826)
• Pages: 93-98
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.826.93
• Online since: February 2016
• Authors: Pravin Pawar*, Sandip Patil, Swapnil Kekade, Swapnil Pawar, Rajkumar Prasad Singh
• Keywords: Abrasion, Chip-Tool Contact Length, Crater Wear, Tool Wear, Wedge Action

References

[1] S. Joshi, P. Pawar, A. Tewari, S. S. Joshi, Tool wear mechanism in machining of three titanium alloys with increasing βphase fraction, Proceedings of Institution of Mechanical Engineers, Part B : journal of Engineering Manufacture, March (2014).

DOI: 10.1177/0954405414522796

[2] E.O. Ezugwu, R.B. Da Silva, J. Bonney, A.R. Machado, Evaluation of the performance of CBN tools when turning Ti–6Al–4V alloy with high pressure coolant supplies, International Journal of Machine Tools & Manufacture, Vol. 45, pp.1009-1014, (2005).

DOI: 10.1016/j.ijmachtools.2004.11.027

[3] Rosemar B. da Silva, Álisson R. Machado, Emmanuel O. Ezugwu, John Bonney, Wisley F. Sales, Tool life and wear mechanisms in high speed machining of Ti–6Al–4V alloy with PCD tools under various coolant pressures, Journal of Materials Processing Technology, Vol. 213, p.1459– 1464, (2013).

DOI: 10.1016/j.jmatprotec.2013.03.008

[4] A B. Mohd Hadzley, R. Izamshah, A. Siti Sarah and M. Nurul Fatin, Finite Element Model of Machining with High Pressure Coolant for Ti-6Al-4V alloy, Procedia Engineering, , p.306–311, (2007).

DOI: 10.1016/j.proeng.2013.02.080

[5] Suresh Palanisamy, Stuart D. McDonald, Matthew S. Dargusch, Effects of Coolant pressure on chip formation while turning Ti6Al4V, International Jr. of Machine Tools and Manufacture, p.739–743, (2009).

DOI: 10.1016/j.ijmachtools.2009.02.010

[6] C. Courbon, D. Kramar, P. Krajnik, F. Pusavec, J. Rech , J. Kopac, Investigation of machining performance in high-pressure jet assisted turning of Inconel718: An Experimental Study, International Journal of Machine Tools & Manufacture, pp: 1114–1125, (2009).

DOI: 10.1016/j.ijmachtools.2009.07.010

[7] Subha Shree , Vijaya Ganesa Velan, and Padmakumar M, Experimental Investigation on Effect of High Pressure Coolant with various Cutting Speed and Feed on Surface Roughness in Cylindrical Turning of AISI 1060 Steel using Carbide Insert, Advanced Materials Research, Vols. 984-985, pp.3-8, , (2014).

DOI: 10.4028/www.scientific.net/amr.984-985.3

[8] Suleymana, Medeniyet, Taguchi DOE Analysis of Surface Integrity for High Pressure Jet Assisted Machining of Inconel 718, Procedia CIRP 13, pp.333-338, (2014).

DOI: 10.1016/j.procir.2014.04.056

[9] An Article on: Coolant and Lubricants Technology, www. effecientmanufacturing. in, (2013).