Numerical simulation of the period of surface micro-protrusions generated on titanium and stainless steel targets by femtosecond laser irradiation

2020 ◽  
Vol 128 (12) ◽  
pp. 124903
Author(s):  
A. K. Singh ◽  
S. Sinha
Keyword(s):  
Numerical Simulation ◽  
Stainless Steel ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Femtosecond Laser Irradiation

Submillimeter Micropart Feeding Along an Asymmetric Femtosecond-Laser-Microfabricated Surface

2009 ◽  
Vol 3 (2) ◽  
pp. 151-156 ◽  
Author(s):  
Atsushi Mitani ◽  
◽  
Shinichi Hirai ◽  
Keyword(s):  
Stainless Steel ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Periodic Structures ◽  
Friction Angle ◽  
Femtosecond Laser Irradiation ◽  
Laser Technology ◽  
Feed Velocity ◽  
Inclined Surfaces ◽  
The Relationship

Femtosecond laser technology forms minute, stable gratings on such materials as silicon and stainless steel. Forming a periodic structure on the surfaces of sliding parts improves tribology characteristics because adhesion decreases with reductions in area of contact. Double-pulsed femtosecond laser irradiation generates periodic structures with asymmetric profiles, along which, as we have shown elsewhere, microparts such as ceramic chip capacitors and resistors can be fed using simple symmetric planar vibration. Microparts move unidirectionally because they adhere to these surfaces asymmetrically. In testing the feasibility of feeding 0402 capacitors 0.4 × 0.2 × 0.2 mm in size and 0.1 mg weighting along an asymmetric surface fabricated using double-pulsed femtosecond laser irradiation, we evaluated differences in the profiles of the two inclined surfaces, effects of decreased adhesion, the forward and backward coefficient of friction, and the bidirectional friction angle of 0402 capacitors. Based on feed experimental results, we assessed the relationship between drive frequency and feed velocity and, by calculating variations in feed velocity, feed stability.

scholarly journals Improving Tribological Properties of Stainless Steel Surfaces by Femtosecond Laser Irradiation

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 606
Author(s):  
Serguei P. Murzin ◽  
Valeriy B. Balyakin ◽  
Gerhard Liedl ◽  
Alexey A. Melnikov ◽  
Roland Fürbacher
Keyword(s):  
Stainless Steel ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Tribological Properties ◽  
Femtosecond Laser Irradiation ◽  
Test Scheme ◽  
Periodic Surface ◽  
Self Organized ◽  
The Coefficient Of Friction ◽  
Pin On Disk

A possibility of improving tribological properties by femtosecond laser irradiation on an example of a steel surface by creating regularly arranged micro-grooved textures that contain self-organized microstructures and nano laser-induced periodic surface structures (LIPSS) was determined. The friction coefficient of the treated surface of a sample of cold-rolled 1.4301 stainless steel was evaluated using a CSM Instruments SA tribometer according to a Pin-on-disk test scheme at a specific pressure of 1 MPa. It was found that the coefficient of friction was reduced by 35% compared to the initial grinded surface. Such laser treatment can find application for using parts in conditions of dry or boundary friction, mainly in units, in which the use of lubricant is unacceptable or extremely undesirable.

Generation of nano-bumps on transparent quartz glass surface under femtosecond laser irradiation

2008 ◽  
Author(s):  
Wei Guo ◽  
Zeng Bo Wang ◽  
Lin Li ◽  
Zhu Liu ◽  
Boris Luk’yanchuk ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Quartz Glass ◽  
Glass Surface ◽  
Femtosecond Laser Irradiation
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