Surface Quality of Ti-6Al-4V Titanium Alloy Parts Machined by Laser Cutting

  • A. Boudjemline College of Engineering, University of Hail, Saudi Arabia
  • M. Boujelbene College of Engineering of Hail, University of Hail, Saudi Arabia
  • E. Bayraktar LISMMA, Supméca – Institut Supérieur de Mécanique de Paris, France
Volume: 10 | Issue: 4 | Pages: 6062-6067 | August 2020 |


This paper investigates high power CO2 laser cutting of 5mm-thick Ti-6Al-4V titanium alloy sheets, aiming to evaluate the effects of various laser cutting parameters on surface roughness. Using multiple linear regression, a mathematical model based on experimental data was proposed to predict the maximum height of the surface Sz as a function of two laser cutting parameters, namely cutting speed and assist-gas pressure. The adequacy of the proposed model was validated by Analysis Of Variance (ANOVA). Experimental data were compared with the model’s data to verify the capacity of the proposed model. The results indicated that for fixed laser power, cutting speed is the predominant cutting parameter that affects the maximum height of surface roughness.

Keywords: laser cutting, titanium alloy, cutting speed, gas pressure, maximum height of surface roughness


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S. Anjum, M. Shah, N. A. Anjum, S. Mehmood, and W. Anwar, "Machining and Surface Characteristics of AISI 304L After Electric Discharge Machining for Copper and Graphite Electrodes in Different Dielectric Liquids," Engineering, Technology & Applied Science Research, vol. 7, no. 4, pp. 1765-1770, Aug. 2017. DOI:

B. E. Aoud, M. Boujelbene, E. Bayraktar, S. B. Salem, and A. Boudjemline, "Experimental Comparison of the Microstructure and Surface Roughness in CO2 Laser Cutting of the Titanium Alloy Ti-6Al-4V and the Pure Titanium Ti," Mechanics of Composite, Hybrid and Multifunctional Materials, vol. 5, 5, pp. 249-255, Oct. 2018. DOI:

D. Aroussi, B. Aour, and A. S. Bouaziz, "A Comparative Study of 316L Stainless Steel and a Titanium Alloy in an Aggressive Biological Medium," Engineering, Technology & Applied Science Research, vol. 9, no. 6, pp. 5093-5098, Dec. 2019. DOI:

M. Boujelbene, "Influence of the CO2 laser cutting process parameters on the Quadratic Mean Roughness Rq of the low carbon steel," Procedia Manufacturing, vol. 20, pp. 259-264, Jan. 2018. DOI:

M. Boujelbene, "Investigation and modeling of the tangential cutting force of the Titanium alloy Ti-6Al-4V in the orthogonal turning process," Procedia Manufacturing, vol. 20, pp. 571-577, Jan. 2018. DOI:

M. Boujelbene, "Process Capability and Average Roughness in Abrasive Water Jet Cutting Process of Stainless Steel," Engineering, Technology & Applied Science Research, vol. 8, no. 3, pp. 2931-2936, Jun. 2018. DOI:

S. Chaki and S. Ghosal, Assisted Oxygen (LASOX) Cutting: A Soft Computing Based Approach. Cham, Switzerland: Springer, 2019. DOI:

J. P. Davim, Machining of Titanium Alloys. Berlin, Germany: Springer-Verlag, 2014. DOI:

M. Douiri, M. Boujelbene, E. Bayraktar, and S. B. Salem, "A Study of the Surface Integrity of Titanium Alloy Ti-6Al-4V in the Abrasive Water Jet Machining Process," Mechanics of Composite, Hybrid and Multifunctional Materials, vol. 5, pp. 221-228, Oct. 2018. DOI:

A. K. Dubey and V. Yadava, "Laser beam machining-A review," International Journal of Machine Tools and Manufacture, vol. 48, no. 6, pp. 609-628, May 2008. DOI:

A. K. Dubey and V. Yadava, "Multi-objective optimisation of laser beam cutting process," Optics & Laser Technology, vol. 40, no. 3, pp. 562-570, Apr. 2008. DOI:

M. A. Elfghi and M. Gunay, "Mechanical Properties of Powder Metallugry (Ti-6Al-4V) with Hot Isostatic Pressing," Engineering, Technology & Applied Science Research, vol. 10, no. 3, pp. 5637-5642, Jun. 2020.

E. O. Ezugwu, "Key improvements in the machining of difficult-to-cut aerospace superalloys," International Journal of Machine Tools and Manufacture, vol. 45, no. 12, pp. 1353-1367, Oct. 2005. DOI:

K. A. Ghany and M. Newishy, "Cutting of 1.2mm thick austenitic stainless steel sheet using pulsed and CW Nd:YAG laser," Journal of Materials Processing Technology, vol. 168, no. 3, pp. 438-447, Oct. 2005. DOI:

A. S. Guldibi and H. Demir, "Aging Effect on Microstructure and Machinability of Corrax Steel," Engineering, Technology & Applied Science Research, vol. 10, no. 1, pp. 5168-5174, Feb. 2020. DOI:

K. Gupta and R. F. Laubscher, "Sustainable machining of titanium alloys: A critical review," Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, vol. 231, no. 14, pp. 2543-2560, Dec. 2017. DOI:

K. Jarosz, P. Löschner, and P. Niesłony, "Effect of Cutting Speed on Surface Quality and Heat-affected Zone in Laser Cutting of 316L Stainless Steel," Procedia Engineering, vol. 149, pp. 155-162, Jan. 2016. DOI:

D. J. Kotadiya, J. M. Kapopara, A. R. Patel, C. G. Dalwadi, and D. H. Pandya, "Parametric analysis of process parameter for Laser cutting process on SS-304," Materials Today: Proceedings, vol. 5, no. 2, Part 1, pp. 5384-5390, Jan. 2018. DOI:

K. Kumar, D. Zindani, and J. P. Davim, Advanced Machining and Manufacturing Processes. Cham, Switzerland: Springer, 2018. DOI:

S. A. Lesik, Applied Statistical Inference with MINITAB®, Second Edition. Boka Raton, FL, USA: CRC Press, 2018. DOI:

C. Leyens and M. Peters, Titanium and Titanium Alloys: Fundamentals and Applications. Weinheim, Germany: Wiley-VCH, 2003. DOI:

P. G. Mathews, Design of Experiments with MINITAB. Milwaukee, WI, USA: ASQ Quality Press, 2005.

Ż. A. Mierzejewska, R. Hudák, and J. Sidun, "Mechanical Properties and Microstructure of DMLS Ti6Al4V Alloy Dedicated to Biomedical Applications," Materials, vol. 12, no. 1, p. 176, Jan. 2019. DOI:

I. Miraoui, M. Boujelbene, and E. Bayraktar, "Effects of Laser Cutting Main Parameters on Microhardness and Microstructure Changes of Stainless Steel," Advanced Materials Research, vol. 664, pp. 811-816, Feb. 2013. DOI:

I. Miraoui, M. Boujelbene, and E. Bayraktar, "Analysis of Roughness and Heat Affected Zone of Steel Plates Obtained by Laser Cutting," Advanced Materials Research, vol. 974, pp. 169-173, Jun. 2014. DOI:

I. Miraoui, M. Boujelbene, and E. Bayraktar, "Analysis of cut surface quality of sheet metals obtained by laser machining: thermal effects," Advances in Materials and Processing Technologies, vol. 1, no. 3-4, pp. 633-642, Feb. 2016. DOI:

D. C. Montgomery, Design and Analysis of Experiments. Hoboken, NJ, USA: John Wiley & Sons, 2017.

D. C. Montgomery, E. A. Peck, and G. G. Vining, Introduction to Linear Regression Analysis, 5th ed. Hoboken, NJ, USA: John Wiley & Sons, 2012.

D. C. Montgomery and G. C. Runger, Applied Statistics and Probability for Engineers. Hoboken, NJ, USA: John Wiley & Sons, 2010.

M. M. Noor, "Prediction Modelling of Surface Roughness for Laser Beam Cutting on Acrylic Sheets," Advanced Materials Research, vol. 83-86, pp. 793-800, Dec. 2009. DOI:

A. K. Pandey and A. K. Dubey, "Modeling and optimization of kerf taper and surface roughness in laser cutting of titanium alloy sheet," Journal of Mechanical Science and Technology, vol. 27, no. 7, pp. 2115-2124, Jul. 2013. DOI:

N. Rajaram, J. Sheikh-Ahmad, and S. H. Cheraghi, "CO2 laser cut quality of 4130 steel," International Journal of Machine Tools and Manufacture, vol. 43, no. 4, pp. 351-358, Mar. 2003. DOI:

K. Rajesh, V. V. M. K. Raju, S. Rajesh, and N. S. K. Varma, "Effect of process parameters on machinability characteristics of CO2 laser process used for cutting SS-304 Stainless steels," Materials Today: Proceedings, vol. 18, pp. 2065-2072, Jan. 2019. DOI:

B. T. Rao, R. Kaul, P. Tiwari, and A. K. Nath, "Inert gas cutting of titanium sheet with pulsed mode CO2 laser," Optics and Lasers in Engineering, vol. 43, no. 12, pp. 1330-1348, Dec. 2005. DOI:

A. Riveiro, F. Quintero, F. Lusquiños, R. Comesaña, and J. Pou, "Influence of assist gas nature on the surfaces obtained by laser cutting of Al-Cu alloys," Surface and Coatings Technology, vol. 205, no. 7, pp. 1878-1885, Dec. 2010. DOI:

L. D. Scintilla, G. Palumbo, D. Sorgente, and L. Tricarico, "Fiber laser cutting of Ti6Al4V sheets for subsequent welding operations: Effect of cutting parameters on butt joints mechanical properties and strain behaviour," Materials & Design, vol. 47, pp. 300-308, May 2013. DOI:

O. A. Shams, A. Pramanik, and T. T. Chandratilleke, "Thermal-Assisted Machining of Titanium Alloys," in Advanced Manufacturing Technologies: Modern Machining, Advanced Joining, Sustainable Manufacturing, K. Gupta, Ed. Cham, Switzerland: Springer, 2017, pp. 49-76. DOI:

L. Shanjin and W. Yang, "An investigation of pulsed laser cutting of titanium alloy sheet," Optics and Lasers in Engineering, vol. 44, no. 10, pp. 1067-1077, Oct. 2006. DOI:

W. M. Steen and J. Mazumder, Laser Material Processing, 4th ed. London, UK: Springer Science & Business Media, 2010. DOI:

D. Teixidor, J. Ciurana, and C. A. Rodriguez, "Dross formation and process parameters analysis of fibre laser cutting of stainless steel thin sheets," The International Journal of Advanced Manufacturing Technology, vol. 71, no. 9, pp. 1611-1621, Apr. 2014. DOI:

C. Veiga, J. P. Davim, and A. J. R. Loureiro, "Review on machinability of titanium aloys: The process perspective," Reviews on Advanced Materials Science, vol. 34, no. 2, pp. 148-164, 2013.

B. S. Yilbas, S. S. Akhtar, E. Bayraktar, and Z. M. Gasem, "Laser Cutting of Thin Aluminum and Silicon Alloy: Influence of Laser Power on Kerf Width," Advanced Materials Research, vol. 445, pp. 442-447, Jan. 2012. DOI:


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