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Surface modification of ASP 30 steel induced by femtosecond laser with 1014 and 1013 W/cm2 intensity in vacuum

Published online by Cambridge University Press:  18 August 2017

M. Trtica*
Affiliation:
Institute of Nuclear Sciences “Vinča”, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia
J. Limpouch
Affiliation:
Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, CZ-115 19 Prague, Czech Republic
P. Gavrilov
Affiliation:
Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, CZ-115 19 Prague, Czech Republic
P. Hribek
Affiliation:
Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, CZ-115 19 Prague, Czech Republic
J. Stasic
Affiliation:
Institute of Nuclear Sciences “Vinča”, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia
G. Brankovic
Affiliation:
Institute for Multidisciplinary Research, University of Belgrade, Kneza Viseslava 1, 11030 Belgrade, Serbia
X. Chen
Affiliation:
Wenzhou University, School for Mechanical and Electrical Engineering, Wenzhou City, PC 325035, People's Republic of China
*
Address correspondence and reprint requests to: M. Trtica, Institute of Nuclear Sciences “Vinča”, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia. E-mail: [email protected]

Abstract

A study of ASP 30 steel surface modification with high intensity Ti:sapphire laser, operating at 804 nm wavelength and pulse duration of 60 fs, in vacuum ambient, is presented. ASP 30 steel surface variations were studied at laser intensities of 1014 and 1013 W/cm2. The steel target specific surface changes and phenomena observed are: (i) Creation of craters at 1014 W/cm2 intensity; (ii) formation of periodic surface structures only at the reduced intensity of 1013 W/cm2; (iii) chemical surface changes registered only at higher laser intensity, and (iv) occurrence of plasma in front of the surface, including its emission in X-ray region. It can be concluded from this study that the reported laser intensities can effectively be applied for ASP 30 steel surface modification. Careful choosing of laser intensity and pulse count can lead to precise superficial material removal, for example laser intensity ~1013 W/cm2 and low pulse count can lead to ultra-precise surface processing. Generally, femtosecond laser surface modification of ASP 30 steel is non-contact and very rapid compared with traditional modification methods.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2017 

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