Melt surface deformation during stainless steel laser cutting in vacuum and atmospheric pressure
Keywords:Cutting, deformation, laser, recoil pressure, surface tension.
The analysis of the recoil pressure generated during stainless steel laser beam irradiation is carried out. The threshold temperature from which the melted surface begins to be deformed is investigated. The corresponding melt expulsion velocity in vacuum and at atmospheric pressure is evaluated. We demonstrate that the recoil pressure contributes weakly to the lateral ejection of the molten material if the surface temperature is equal or is lower than that of the vaporization one at atmospheric pressure. This recoil pressure causes expulsion only only for surface temperatures which are very higher than the boiling point; this conclusion is not valid in vacuum. It is also shown that the initial stage of liquid metal ejection can be predicted by balancing the vapor recoil force with the surface tension force at the periphery of the liquid pool.
 S. I. Anisimov, "Vaporization of Metal Absorbing Laser Radiation", Sov. Phys, JETP 27 182-183; 1968.
 C. J. Knight. "Theoretical Modelling of Rapid Surface Vaporization with Back Pressure", AIAA J.; 17 5. Pp519-523, 1979.
 V. Semak and A. Matsunawa. "Role of the Recoil Pressure in Energy Balance During Laser Welding", Journal of Physics D: Applied Physics, Vol 30, p.2541, 1997.
 L I Kuznetsov. "Recoil momentum at a solid surface during developed laser ablation Quantum Electron", 23 1035-1038, 1994.
D J Lee, S H Jeong. "Analysis of recoil force during Nd: YAG laser ablation of silicon", Appl. Phys. A 79 1341-1344, 2004.
 A. Matsunawa and V. Semak. "Simulation of the Front Keyhole Wall Dynamics During Laser Welding", J of Physics D: Applied Physics, vol. 30, p.798, 1997.
 V. Semak, B. Damkroger, S. Kempkq. "Temporal Evolution of the Temperature Field in the Beam Interaction Zone during Laser Material Processing", J Phys.D: Appl. Phys, vol. 32, pp.1819-1825, 1999.
 Voisey, K. T., Kudesia, S. S., Rodden, W. S. O., Hand, D. P., Jones, J. D. C., & Clyne, T. W. "Melt ejection during laser drilling of metals", Materials Science and Engineering: A, 356 (1-2), pp 414-424. 2003.
 M. Aden, E Beyer, G Herziger, H Kunze. "Laser-induced vaporization of a metal surface", J. Phys. D: Appl. Phys. 25 57-65, 1992.
 M Aden, E Beyer, G Herziger. "Laser-induced vaporization of metal as a Riemann problem", J. Phys. D: Appl. Phys. 23 655-66, 1990.
 J P Bellot, H Duval, M Ritchie, A Mitchell, D Ablitzer. "Evaporation of Fe and Cr from Induction-stirred Austenitic Stainless Steel. Influence of the Inert Gas Pressure", ISIJ International, 41, 696-705, 2001.
 V. Semak, G A Knorovsky, D O MacCallum, R Allen Roach. "Effect of surface tension on melt pool dynamics during laser pulse interaction", J. Phys. D: Appl. Phys. 39 590-595, 2006.
 Koji Hirano, RÃ©my Fabbro, "possible explanations for different surface quality in laser cutting with 1 micron and 10 microns beams", Journal of Laser Applications, Vol. 24, NÂ°1, p.012006 (9 pages), 2012.
View Full Article:
How to Cite
LicenseAuthors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under aÂ Creative Commons Attribution Licensethat allows others to share the work with an acknowledgement of the work''s authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal''s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (SeeÂ The Effect of Open Access).