Effect of stationary femtosecond laser irradiation on substructures' formation on a mold stainless steel surface

Pavel Bizi-Bandoki 1 Stéphane Valette 1 Eric Audouard 2 Stéphane Benayoun 1
1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes
2 LHC - Laboratoire Hubert Curien [Saint Etienne]
Abstract : Nano-scale and micro-scale laser-induced periodic surface structures (ripples), pores and splash-like structures with different formation thresholds fluence have been observed after stationary multiple linearly polarized femtosecond laser irradiations on a molding stainless steel. Nano-scale structures exhibit a formation threshold fluence lower than that of micro-scale ripples. When increasing both power density and number of pulses, nano-scale ripples are only sensitive to the latter, showing a 15% decrease of their spatial period in the range of used values. Micro-scale ripples respond to these two laser parameters by an increase followed by a decrease of their spatial period. The two types of ripples exhibit behavior differences that show that micro- and nano-scale ripples are the results of two distinct mechanisms.
Keywords : Surface morphology Ripples Ripples formation threshold fluence Pores Splashes Fluence regimes Incubation Femtosecond Mold steel
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Journal articles
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https://hal-ujm.archives-ouvertes.fr/ujm-00983505
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Submitted on : Friday, April 25, 2014 - 1:55:36 PM
Last modification on : Wednesday, July 25, 2018 - 2:05:31 PM

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UNIV-ST-ETIENNE | EC-LYON | LTDS | LAHC | ENTPE | IOGS | PARISTECH

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Pavel Bizi-Bandoki, Stéphane Valette, Eric Audouard, Stéphane Benayoun. Effect of stationary femtosecond laser irradiation on substructures' formation on a mold stainless steel surface. Applied Surface Science, Elsevier, 2013, 270, pp.197. ⟨10.1016/j.apsusc.2012.12.168⟩. ⟨ujm-00983505⟩

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