Microholes for the production of gasoline direct injection nozzles were obtained by ultrashort pulsed laser machining in martensitic stainless steels. The inner surface analysis was carried out by a specifically conceived Scanning Probe Microscopy instrument and revealed the presence of periodic surface microstructures whose formation was studied as a function of process parameters (pulse energy, repetition rate, rotational speed, drilling strategy). Experiments demonstrated that geometrical features of the microstructures can be varied by a proper parameter selection and open the perspective for an optimized process enabling a reduction of coking accumulation during service life and a more effective atomization of the fuel jet.

Ultrashort pulsed laser drilling and surface structuring of microholes in stainless steels

L. Romoli;DINI, GINO;TANTUSSI, FRANCESCO;FUSO, FRANCESCO;
2014-01-01

Abstract

Microholes for the production of gasoline direct injection nozzles were obtained by ultrashort pulsed laser machining in martensitic stainless steels. The inner surface analysis was carried out by a specifically conceived Scanning Probe Microscopy instrument and revealed the presence of periodic surface microstructures whose formation was studied as a function of process parameters (pulse energy, repetition rate, rotational speed, drilling strategy). Experiments demonstrated that geometrical features of the microstructures can be varied by a proper parameter selection and open the perspective for an optimized process enabling a reduction of coking accumulation during service life and a more effective atomization of the fuel jet.
2014
Romoli, L.; Rashed, C. A. A.; Lovicu, G.; Dini, Gino; Tantussi, Francesco; Fuso, Francesco; Fiaschi, M.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/520269
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