Multi-Objective Optimization on Drilling of Titanium Alloy (Ti6Al4V)

Abstract:

Titanium alloys present superior properties like resistance to corrosion, high strength to weight ratio etc, but possess poor machinability. Titanium alloy Ti-6Al-4V is the most commonly used titanium alloy in aerospace and medical device industries. Titanium and its alloys are notorious for their poor thermal properties and are classified as difficult-to-machine materials. Drilling is an important machining process since it is involved in nearly all titanium applications. It is desirable to develop optimized drilling processes for Ti and improve the hole characteristics such as hole diameter, circularity and exit burr of currently available processes. Due to the low machinability of the alloys under study, selecting the machining conditions and parameters is crucial. The range of spindle speed and feed rate, which provide a satisfactory tool life, is very limited. The hole quality (hole diameter and circularity), thrust force, torque and exit burr were evaluated at various spindle speeds, feed rates combinations. The optimized parameter is chosen using the multi-objective weighted sum optimization technique.

• Periodical: Materials Science Forum (Volume 763)
• Pages: 29-49
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.763.29
• Online since: July 2013
• Authors: A. Prabukarthi, V. Krishnaraj, M. Senthil Kumar
• Keywords: Drilling, Optimization, Ti-6Al-4V Titanium Alloy

References

[1] Arshinov,V and Alekseev ,G. (1976) Metal cutting theory and cutting tool design MIR publishers, Moscow.

[2] Cantero, J, L,Tardio,M,M, Cantelia,j, A, Marcos,M and Miguelez,M,H. (2005) 'Dry drilling of alloy Ti–6Al–4V', International Journal of Machine Tools & Manufacture, Vol. 45, pp.1246-1255.

DOI: 10.1016/j.ijmachtools.2005.01.010

[3] J. Campos Rubio, A. M. Abrao, P. E. Faria, A. Esteves Correia, and J. Paulo Davim,. (2004), 'Effects of high speed in the drilling of GFRP: Evaluation of the delamination factor', International Journal of Machine Tools and Manufacture,Vol. 48, pp.715-720.

DOI: 10.1016/j.ijmachtools.2007.10.015

[4] Dornfeld,D,A,. Kim,J,S,. Dechow,H,. Hewson,J. and Chen,L,J,. (1999), 'Drilling Burr Formation in Titanium Alloy, Ti-6Al-4V', CIRP, Vol. 48, No. 1, pp.73-76.

DOI: 10.1016/s0007-8506(07)63134-5

[5] Ezugwu,E,O, and Wang,Z,M,. (1997) 'Titanium alloys and their machinability – A Review', Journal of Processing Technology, Vol. 68, pp.262-274.

DOI: 10.1016/s0924-0136(96)00030-1

[6] Kim,D and Ramulu,M. (2004) 'Drilling process optimization for graphite /bismaleimide - titanium alloy stacks', Composite Structures, Vol.63, pp.101-114.

DOI: 10.1016/s0263-8223(03)00137-5

[7] Mustafizur Rahman, Zhi-Gang Wang, and Yoke-San Wong, 2006, 'A review on High-Speed Machining of Ti alloys', JSME ,Vol. 49, No.1,pp.11-20.

[8] Paulo Davim,J and Conceicao Antonio,C,A( 2001) 'Optimal drilling of particulate metal matrix composites based on experimental and numerical procedures', International Journal of Machine Tools and Manufacture, Vol. 41, pp.21-31.

DOI: 10.1016/s0890-6955(00)00071-7

[9] Paulo Davim, J and Pedro Reis, (2003) 'Drilling carbon fiber reinforced plastics manufactured by autoclave-experimental and statistical study', Materials and Design, Vol. 24, pp.315-324.

DOI: 10.1016/s0261-3069(03)00062-1

[10] Rui Li, Parag Hegde, and Albert J. Shih, (2007) 'High-throughput drilling of titanium alloys', International Journal of Machine Tools & Manufacture, Vol. 47, pp.63-74.

DOI: 10.1016/j.ijmachtools.2006.02.012

[11] Ramulu ,M,. Branson,T. and Kim,D.( 2001) 'A study on the drilling of composite and titanium stacks', Composite Structures, Vol. 54, pp.67-77.

DOI: 10.1016/s0263-8223(01)00071-x

[12] Ramulu,M , Rao,P,N and Kao,H (2002) 'Drilling of (Al2O3)p/6061 metal matrix composites', Journal of Materials Processing Technology, Vol. 124, pp.244-254.

DOI: 10.1016/s0924-0136(02)00176-0

[13] Ribeiro,M,V,. Moreira,M,R,V and Ferreira,J,R (2003) 'Optimization of titanium alloy (6Al–4V) machining', Journal of Materials Processing Technology, Vol. 143-144, p.458–463.

DOI: 10.1016/s0924-0136(03)00457-6

[14] Sharif,S and Rahim,E,A (2007) 'Performance of coated- and uncoated-carbide tools when drilling titanium alloy - Ti–6Al-4V', Journal of Materials Processing Technology, Vol. 185, pp.72-76.

DOI: 10.1016/j.jmatprotec.2006.03.142

[15] Ugo. Enemuoh,E, Sherif EI Gizawy,A and Chukwujekwu Okafor,A (2001), 'An approach for development of damage free drilling of carbon fiber reinforced thermosets', International Journal of Machine Tools and Manufacture, Vol. 41, pp.1795-1814.

DOI: 10.1016/s0890-6955(01)00035-9

[16] Velayudham,A,. Krishnamurthy,R,. and Soundarapandian,T,. (2005) 'Evaluation of drilling characteristics of high volume fraction fibre glass reinforced polymeric composite', International Journal of Machine Tools and Manufacture, Vol. 45, pp.399-406.

DOI: 10.1016/j.ijmachtools.2004.09.012