Int. J. of Nanomanufacturing   »   2010 Vol.6, No.1/2/3/4

 

 

Title: Experimental and theoretical investigation of the ablation mechanisms during femptosecond laser machining

 

Author: P. Stavropoulos, A. Stournaras, K. Salonitis, G. Chryssolouris

 

Addresses:
Laboratory for Manufacturing Systems and Automation, Department of Mechanical Engineering and Aeronautics, University of Patras, Patras 265 00, Greece.
Laboratory for Manufacturing Systems and Automation, Department of Mechanical Engineering and Aeronautics, University of Patras, Patras 265 00, Greece.
Laboratory for Manufacturing Systems and Automation, Department of Mechanical Engineering and Aeronautics, University of Patras, Patras 265 00, Greece.
Laboratory for Manufacturing Systems and Automation, Department of Mechanical Engineering and Aeronautics, University of Patras, Patras 265 00, Greece

 

Abstract: In this work, a theoretical model based on molecular dynamics (MD) simulations and experimentation results of the femptosecond laser (FS) ablation, are applied for the description of ultrashort laser ablation of metals, with emphasis being given to the understanding of the material removal. The ablation of Fe with the use of 100 fs laser pulses, at a wavelength of 775 nm, is studied. Computational and experimental results have revealed that within the investigated laser fluences range (0.01 to 30 J/cm²), four different ablation areas accompanied by different ablation mechanisms, are distinguished. The threshold of the actual ablation has been determined to be at 0.1 J/cm². The ablation depth as a function of the laser fluence and the ablation threshold value have been evaluated and compared with the experimental data available.

 

Keywords: laser ablation; femtosecond laser machining; molecular dynamics; simulation; nanomanufacturing; nanotechnology; material removal.

 

DOI: 10.1504/IJNM.2010.034772

 

Int. J. of Nanomanufacturing, 2010 Vol.6, No.1/2/3/4, pp.55 - 65

 

Available online: 22 Aug 2010

 

 

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