Cutting and thrust forces in face turning of Ti6Al4V under various cutting environments

Year 2021, Volume: 39 Issue: 1, 39 - 44, 01.03.2021

Alper Uysal

Abstract

Ti6Al4V alloys are widely applicable in aerospace, military, automotive, medical etc. industries due to their inherent properties such as high temperature resistance, high strength to weight ratio, dimensional stability, great corrosion endurance etc. However, there are some challenges on machining of Ti6Al4V becaus e of their high hardness, elevated cutting temperature at cutting zone, chemical reaction between cutting tool and workpiece. For these reasons, the studies related to machining of these alloys have been conducting. In the presented experimental study, fac e turning tests were performed on Ti6Al4V alloy under dry, minimum quantity lubrication (MQL) and cryogenic (liquid nitrogen, LN 2 ) conditions at various cutting speeds. During machining experiments, cutting and thrust forces were measured. Based on the force results, the cutting forces reduced with increase of the cutting speed in three cutting environments. Additionally, the minimum cutting forces were achieved under MQL condition whereas the maximum cutting forces were obtained under dry cutting.

Keywords

Ti6Al4V, face turning, c utting forces, c ryogenic, MQL

References

• [1] Yuan S. M., Yan L. T., Liu W. D., Liu Q., Effects of cooling air temperature on cryogenic machining of Ti–6Al–4V alloy. J Mater Process Tech 2011;211:356-62.
• [2] Machai C., Iqbal A., Biermann D., Upmeier T., Schumann S., On the effects of cutting speed and cooling methodologies in grooving operation of various tempers of β-titanium alloy. J Mater Process Tech 2013;213:1027-37.
• [3] Sales W. F., Schoop J., Jawahir I. S., Tribological behavior of PCD tools during superfinishing turning of the Ti6Al4V alloy using cryogenic, hybrid and flood as lubri-coolant environments. Tribol Int 2017;114:109-20.
• [4] Benjamin D. M., Sabarish V. N., Hariharan M. V., Raj D. S., On the benefits of sub-zero air supplemented minimum quantity lubrication systems: An experimental and mechanistic investigation on end milling of Ti-6-Al-4-V alloy. Tribol Int 2018;119:464-73.
• [5] Umbrello D., Rotella G., Fatigue life of machined Ti6Al4V alloy under different cooling conditions. CIRP Ann - Manuf Techn 2018;67:99-102.
• [6] Damir A., Shi B., Attia M. H., Flow characteristics of optimized hybrid cryogenic-minimum quantity lubrication cooling in machining of aerospace materials. CIRP Ann - Manuf Techn 2019;68:77-80.
• [7] Gross D., Bigelmaier M., Meier T., Amon S., Ostrowicki N., Hanenkamp N., Investigation of the influence of lubricating oils on the turning of metallic materials with cryogenic minimum quantity lubrication. Proc CIRP 2019;80:95-100.
• [8] Rubio E. M., Bericua A., de Agustina B., Marin M. M., Analysis of the surface roughness of titanium pieces obtained by turning using different cooling systems. Proc CIRP 2019;79:79-84.
• [9] Shokrani A., Al-Samarrai I., Newman S. T., Hybrid cryogenic MQL for improving tool life in machining of Ti-6Al-4V titanium alloy. J Manuf Process 2019;43:229-43.
• [10] Al-Ghamdi K. A., Iqbal A., Hussain G., Machinability comparison of AISI 4340 and Ti-6Al-4V under cryogenic and hybrid cooling environments: A knowledge engineering approach. P I Mech Eng B - J Eng 2015;229(12):2144-64.
• [11] Sun S., Brandt M., Dargusch M. S., Machining Ti-6Al-4V alloy with cryogenic compressed air cooling. Int J Mach Tool Manu 2010;50(11):933-42.
• [12] Bermingham M. J., Kirsch J., Sun S., Palanisamy S., Dargusch M. S., New observations on tool life, cutting forces and chip morphology in cryogenic machining Ti-6Al-4V. Int J Mach Tool Manu 2011;51(6):500-11.
• [13] Dhananchezian M,, Kumar M, P., Cryogenic turning of the Ti-6Al-4V alloy with modified cutting tool inserts. Cryogenics 2011;51(1):34-40.
• [14] Bermingham M. J., Palanisamy S., Kent D., Dargusch M. S., A comparison of cryogenic and high pressure emulsion cooling technologies on tool life and chip morphology in Ti-6Al-4V cutting. J Mater Process Tech 2012;212(4):752-65.
• [15] Shokrani A., Dhokia V., Newman S. T., Comparative investigation on using cryogenic machining in CNC milling of Ti-6Al-4V titanium alloy. Mach Sci Technol 2016;20(3):475-94.
• [16] Ayed Y., Germain G., Melsio A. P., Kowalewski P., Locufier D,. Impact of supply conditions of liquid nitrogen on tool wear and surface integrity when machining the Ti-6Al-4V titanium alloy. Int J Adv Manuf Tech 2017;93:1199-206.
• [17] Mia M., Dhar N.R., Influence of single and dual cryogenic jets on machinability characteristics in turning of Ti-6Al-4V. P I Mech Eng B - J Eng 2019;233(3):711-26.
• [18] Jamil M, Khan AM, Hegab H, Hong L, Mia M, Gupta MK, He N. Effects of hybrid Al2O3-CNT nanofluids and cryogenic cooling on machining of Ti-6Al-4V. Int J Adv Manuf Tech 2019;102:3895-909.
• [19] Sartori S., Taccin M., Pavese G., Ghiotti G., Bruschi S., Wear mechanisms of uncoated and coated carbide tools when machining Ti6Al4V using LN2 and cooled N2. Int J Adv Manuf Tech 2018;95:1255-64.