Teirumnieks, Edmunds

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Preferred name
Teirumnieks, Edmunds
Official Name
Teirumnieks, Edmunds
Alternative Name
Edmunds Teirumnieks
Main Affiliation
Email
edmunds.teirumnieks@rta.lv
ORCID
Scopus Author ID
56323300300
Researcher ID
GDR-2698-2022

Research Output

Now showing 1 - 2 of 2
  • Publication
    Effect of Laser Marking Speed, Power and Pitch on Hardness and Roughness of Aisi 304l
    (2023)
    Lazov, Lyubomir 
    ;
    Teirumnieks, Edmunds 
    ;
    Emil Yankov
    ;
    Nikolay Angelov
    ;
    Adijāns, Imants 
    ;
    Antons, Pacejs 
    In this study, an experiment was conducted to change the technological properties of the surface by infra-red laser marking. The influence of power, speed and raster step was investigated. These parameters during laser marking of AISI 304L steel have a significant change on the microhardness and surface roughness. It was found that high stiffness is achieved at higher powers and small pitch. An analysis of the results showed that as the raster step increases, the roughness of the marked sample decreases. The influence of linear energy density and overlap factor on the process was also investigated. The microhardness of the treated surfaces increases with an increase in the linear energy density and the overlap coefficient, and in the first case the dependence is almost linear, and in the second - non-linear.
  • Publication
    INVESTIGATION OF SURFACE ROUGHNESS OF CARBON STEEL MACHINED PARTS AFTER NANOSECOND FIBER LASER MARKING
    (2023)
    Petar Tsvyatkov
    ;
    Emil Yankov
    ;
    Lazov, Lyubomir 
    ;
    Teirumnieks, Edmunds 
    ;
    Pīgožnis, Kārlis 
    Laser marking with a nanosecond fiber laser is one of the most common ways to permanently mark various engineering materials. The roughness of the machined surface and its observation is essential to evaluate the impact on the contrast of the marking as well. Experimental studies of the roughness obtained as a result of the laser marking, were inspected using a 3D measuring laser microscope OLYMPUS LEXT OLS5100. Analysis of the graphical dependence of the roughness function on the four process parameters: laser power, frequency, speed of marking and step.