Laser Micromachining of Titanium Alloy in Water with Different Temperatures

Abstract:

Underwater laser machining process has been employed as an alternative process to ablate materials with minimum thermal damage. Though many studies provide comprehensive investigations to enable the understanding of laser-water-material interactions during the laser ablation process in water, the effect of water temperature on the ablation performance has not been revealed yet. To cope with this challenge, this paper presents the roles of water temperature on cut dimensions in the underwater laser micromachining of titanium alloy (Ti-6Al-4V). The effects of laser power, traverse speed and number of laser passes were also examined in this study, where groove width and depth were measured and analyzed. The experimental results showed that a deep cut can be produced by using slow traverse speed with multiple-pass technique. However, using too high laser power can cause a shallow cut due to the large formation of recast in the laser-ablated area. According to the findings of this study, the laser energy density of about 750 J/mm² can provide the deepest cut among the other conditions examined in this study.

• Periodical: Key Engineering Materials (Volume 777)
• Pages: 333-338
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.777.333
• Online since: August 2018
• Authors: Taweeporn Wuttisarn*, Viboon Saetang, Chaiya Dumkum
• Keywords: Laser, Micromachining, Temperature, Titanium Alloy, Water

References

[1] W. Charee, V. Tangwarodomnukun, C. Dumkum, Laser ablation of silicon in water under different flow rates, Int J Adv Manuf Technol. 78 (2015) 19.

DOI: 10.1007/s00170-014-6625-6

[2] B. Kim, R. Iida, D.H. Doan, F. Kazuyoshi, Mechanism of nanosecond laser drilling process of 4H-SiC for through substrate vias, Appl. Phys. A 123 (2017) 392.

DOI: 10.1007/s00339-017-0986-2

[3] G. Li, S. Hu, H. Tang, B. Chen, Laser repeat drilling of aluminum ceramics in static water, Int J Adv Manuf Technol (2018).

[4] V. Tangwarodomnukun, T. Wuttisarn, Evolution of milled cavity in the multiple laser scans of titanium alloy under a flowing water layer, Int J Adv Manuf Technol 92 (2017) 293-302.

DOI: 10.1007/s00170-017-0125-4

[5] M. A. Jafarabadi, M. H. Mahdieh, Single and double long pulse laser ablation of aluminum induced in air and water ambient, Appl. Surf. Sci. 396 (2017) 732-739.

DOI: 10.1016/j.apsusc.2016.11.018

[6] I. Nicolae, M. Bojan, C. Viespe, D. Miu, Repetition rate effects in picosecond laser microprocessing of aluminum and steel in water, Micromachines 8 (2017) 316.

DOI: 10.3390/mi8110316

[7] A. Kanitz, J.S. Hoppius, M. Fiebrandt, P. Awakowicz, C. Esen, A. Ostendorf, E.L. Gurevich, Impact of liquid envirnment on femtosecond laser ablation, Appl. Phys. A 123 (2017) 674.

DOI: 10.1007/s00339-017-1280-z

[8] Z. Zhai, W. Wang, X. Mei, K. Wang, H. Yang, Influence of plasma shock wave on the morphology of laser drilling in different environments, Optics Communications. 390 (2017) 49-56.

DOI: 10.1016/j.optcom.2016.12.066

[9] M. Trtica, J. Stasic, D. Batani, R. Benocci, V. Narayanan, J. Ciganovic, Laser assisted surface modification of Ti-implant in air and water environment, Appl. Surface Science 428 (2018) 669-675.

DOI: 10.1016/j.apsusc.2017.09.185