Abstract
Steel moulds are widely used as forming tools during the fabrication of fibre reinforced thermoplastic composite parts. The aim of this work is to study sub-micron laser-induced surface modifications which help to control interfacial properties, such as undesirable sticking, between the composite polymer and the steel mould material.
Stainless steel (AISI 430) samples were machined with a laser with wavelength of λ = 515 nm and 7 ps pulse duration. The periodicity of the Laser-induced Periodic Surface Structures (LIPSS) was determined, via fast Fourier transform of scanning electron microscope images, as a function of input parameters, such as effective number of laser pulses, pulse energy and accumulated fluence.
Above a certain threshold, LIPSS appear over a broad range of fluences. Spatial frequencies were found to be between about λ/10 and ~λ for laser pulse energies of up to ~1 µJ. First results from experiments on interaction of composite polymers and steel moulds are also shown.
Stainless steel (AISI 430) samples were machined with a laser with wavelength of λ = 515 nm and 7 ps pulse duration. The periodicity of the Laser-induced Periodic Surface Structures (LIPSS) was determined, via fast Fourier transform of scanning electron microscope images, as a function of input parameters, such as effective number of laser pulses, pulse energy and accumulated fluence.
Above a certain threshold, LIPSS appear over a broad range of fluences. Spatial frequencies were found to be between about λ/10 and ~λ for laser pulse energies of up to ~1 µJ. First results from experiments on interaction of composite polymers and steel moulds are also shown.
Original language | English |
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Publication status | Published - 24 Jun 2019 |
Event | Lasers in Manufacturing 2019 - International Congress Center Munich, Munich, Germany Duration: 24 Jun 2019 → 27 Jun 2019 https://www.wlt.de/lim/index.html |
Conference
Conference | Lasers in Manufacturing 2019 |
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Abbreviated title | LiM 2019 |
Country/Territory | Germany |
City | Munich |
Period | 24/06/19 → 27/06/19 |
Other | As a part of the World of Photonics Congress |
Internet address |