Structural variations on the surface of metallic products at laser marking

Konchus, Darina A.; Pryakhin, E. I.; Sivenkov, A. V.

doi:10.17580/cisisr.2021.02.18

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…Технологические режимы маркировки НБК отрабатывали на изделиях из медных и титановых сплавов, широко применяемых в машиностроении. Выбор материалов для исследования обусловлен химическим составом и теплофизическими свойствами сплавов, позволяющими формировать цветные оксидные слои при лазерной маркировке [9][10][11]. Для получения цветовых палитр и определения технологических режимов маркировки основных цветовых оттенков выбрали следующие материалы: латунь Л59, медь М1, титановый сплав ВТ1-0 и алюминиевый сплав Д16 [12][13][14].…”

Section: материалы и методы исследованияunclassified

Features of colour ultradense multidimensional nanobarcodes created on the surface of items made of non-ferrous metals and their alloys

Petkova,

Ganzulenko

2023

tsm

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The authors of this paper developed an original method to create colour matrix codes aimed at counterfeit protection of items, preventing unauthorized use of information, verifying the authenticity of items, ensuring their clear identification, increasing the ID capacity (text, graphical, audio and video information and other digital data) approximately by 5 times and creating a machine-readable template image of such ID. The proposed colour code helps transform the known black-and-white nanobarcode into a multi-dimensional colour code applied to a two-dimensional matrix or increase the nanobarcode capacity by several times. Multi-dimensional colour matrix codes enable to increase the amount of data contained in the colour code due to the use of a graphical two-dimensional matrix to which all layers of binary-coded data are applied. It is possible to create digital codes and apply codes to metal surface by printing or laser marking. Definition of reference colour cells ensures that the code will be read and decoded even if the technical characteristics of printers and scanners differ. The obtained colour palettes and databases of laser marking regimes applicable to titanium, copper and aluminium alloys ensure reproducibility of the main colours for all the mentioned materials. Through the use of four or eight colours in the colour matrix code instead of merely black and white in the two-dimensional one, the code capacity can be increased to two or three bits of information depending on the number of colour layers. By making use of four or eight stable colours, including the background colour, one can create two-and three-layer colour matrix codes on the surface of each of the above listed materials. Candidate of Technical Sciences E. V. Larionova took an active part in the work, who formulated the principles of creating a 3-dimensional color nanobarkode.

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Section: материалы и методы исследованияunclassified

Features of colour ultradense multidimensional nanobarcodes created on the surface of items made of non-ferrous metals and their alloys

Petkova,

Ganzulenko

2023

tsm

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Rationale for Choice of the Laser Marking Modes for Corrosion-Resistant Metals and Alloys

Petkova,

Ganzulenko,

Gorbatyuk

et al. 2023

Metallurgist

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Two-dimensional code marking and coloration mechanism on titanium alloy surfaces via laser gas nitriding

Li,

Sun,

et al. 2024

Appl. Opt.

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In this study, a nanosecond laser marking machine was employed to nitride the surface of a Ti-6Al-4V alloy in a nitrogen-rich environment. Consequently, a crack-free and uniform nitriding layer was successfully achieved. Furthermore, a 2D code with enhanced contrast was imprinted on the sample, and subsequently, a durability test was conducted to assess its performance. The impacts of laser power (ranging from 9 to 11 W), scanning speed (17 to 23 mm/s), and line spacing (20 to 40 µm) on the surface morphology, thickness, and color alteration of the nitride layer were systematically investigated through experimental analysis. Utilizing a spectrophotometer, scanning electron microscope, optical microscope, energy dispersive spectroscopy instrument, and other advanced equipment, we further delved into the underlying mechanism of surface color change during laser gas nitriding of a Ti-6Al-4V alloy. Results indicate that an increase in laser power and a decrease in line spacing and scanning speed lead to the generation of higher energy densities on the material surface, intensifying ablation and causing the formation of more molten material. Consequently, this results in the development of more complex surface structures, thicker nitride layers, and lower reflectance. The surface microstructure of the nitride layer exhibits similarities and variations, and the thickness of the nitride layer differs, leading to distinct light absorption and reflection properties on its surface. Consequently, the nitride-layer surfaces prepared under varying laser parameters exhibit diverse contrasts.

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Structural variations on the surface of metallic products at laser marking

Cited by 3 publications

References 10 publications

Features of colour ultradense multidimensional nanobarcodes created on the surface of items made of non-ferrous metals and their alloys

Features of colour ultradense multidimensional nanobarcodes created on the surface of items made of non-ferrous metals and their alloys

Rationale for Choice of the Laser Marking Modes for Corrosion-Resistant Metals and Alloys

Two-dimensional code marking and coloration mechanism on titanium alloy surfaces via laser gas nitriding

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