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ND:YAG Laser Pulses Ablation Threshold of Stainless Steel 304

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DOI: 10.4236/msa.2015.67065    2,921 Downloads   3,488 Views   Citations

ABSTRACT

Laser processing and laser surface texturing in multiple fields have become a popular topic of study in recent decades. Understanding the principles behind the laser irradiation mechanism is an essential step in choosing the most effective process parameters. Through this study, the effects of power and pulse duration on the structure and surface pattern of stainless steel type 304 were examined, and optimized laser parameters were introduced for desired laser penetration and heat-affected areas on the surface. The analyzed sample was prepared by using variations of pulse durations and different pulsed energies. Looking at the trend of change of non-dimensional temperature along the surface, thickness, and center of the sample, the effects of pulse duration and intensity (corresponding to energy) were observed. Upon considering all the aspects of the irradiated spots, such as heat-affected area diameter, surface patterns, and penetration depth, the advantages and disadvantages of short and long pulse durations are mapped out clearly. Also, a new method to obtain the ablation threshold of stainless steel is introduced, and a thorough analytical solution is obtained.

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Radmanesh, M. and Kiani, A. (2015) ND:YAG Laser Pulses Ablation Threshold of Stainless Steel 304. Materials Sciences and Applications, 6, 634-645. doi: 10.4236/msa.2015.67065.

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