Structure Peculiarities of the Surface Layers of Structural Steel under Laser Alloying

Berdnikova, О.М.; Kushnarova, Olga; Bernatskyi, Artemii; Alekseienko, T.; Polovetskyi, Yevhen; Khokhlov, M.A.

doi:10.1109/nap51477.2020.9309615

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…The appearance of large phase formations, however, may promote the development of dislocation clusters with their higher density. Such a structural state may lead to the formation of zones of deformation localization and an abrupt increase in the level of local internal stresses in these structural zones [23]. This, in turn, will lead to cracking in the deposited layer material.…”

Section: Methodsmentioning

confidence: 99%

Features of the Stress–Strain State of 3D Metal Objects Produced by Additive Microplasma Deposition of the Powder of a Fe–Cr–Ni–B–Si System

Korzhyk,

Gao,

Khaskin

et al. 2024

Applied Sciences

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The objective of this study was the additive microplasma powder deposition of 3D metal products. The regularities of the influence of technological parameters of additive microplasma deposition of spatial objects using the powder filler material of a Fe–Cr–Ni–B–Si system on the formation of the microstructure and stress–strain state of 3D product material were studied in this work. Product walls with a layered metal structure with a deposited layer height of about 650 µm and 3.0–3.5 mm thickness were formed as a result of additive microplasma deposition of the HYF–103 powder of a Fe–Cr–Ni–B–Si system. The deposited metal ensured a high ultimate strength (above 600 MPa). The finite element method was used to derive the solution of the thermomechanical problem of additive deposition of 3D prototypes («cylinder», «triangular prism», «square prism», «reverse cone», «straight cone») with HYF–103 powder. The equivalent stresses of the highest magnitude (565 MPa) were predicted in the model sample of the “reverse cone” type, and the lowest stresses (552 MPa) were present in the sample of the “straight cone” type. For all the models, the maximal values of radial movements corresponded to the range of 0.22–0.28 mm. The respective technological mode of deposition was selected to minimize the stress–strain state of the produced 3D objects.

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Section: Methodsmentioning

confidence: 99%

Features of the Stress–Strain State of 3D Metal Objects Produced by Additive Microplasma Deposition of the Powder of a Fe–Cr–Ni–B–Si System

Korzhyk,

Gao,

Khaskin

et al. 2024

Applied Sciences

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show abstract

“…In contrast to laser hardening, the process of laser alloying and laser cladding of materials on the base of the processed product leads to changes in the chemical composition and surface quality, forming a purposeful structure of the surface layer with a given set of properties. In particular, laser surface alloying consists in saturating the material with alloying elements by the diffusion of a pre-applied layer under the influence of a laser beam (10 5 -10 6 W/cm 2 ) [6]. It is shown that the laser surface alloying technology contributes to an increase in the wear resistance of iron-carbon alloys by 1.5-3.0 times [7].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Surface quality improvement of steel parts by combined laser-ultrasonic treatment: determination algorithm of technological parameters

Lesyk

Dzhemelinskyi

Mordyuk

et al. 2023

EEJET

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To provide the quality of the surface layer and improve operational properties, a combined laser-ultrasonic surface hardening and finishing technology of steel products is proposed. This work is devoted to determining the range of rational parameters of laser heat treatment and ultrasonic impact treatment for enhancing the complex hardening process of AISI 1045 steel and AISI D2 steel. Laser surface transformation hardening was carried out with a constant temperature strategy using a fiber laser and scanning optics at a heating temperature of 1200–1,300 °C and a processing speed of 40–140 mm/min. Ultrasonic surface hardening and finishing were performed on technological equipment with an amplitude of ultrasonic vibration of 18 μm and a load of the ultrasonic tool of 50 N. The ultrasonic treatment duration varied from 60 to 180 s. The results showed that laser-ultrasonic treatment leads to an increase in the hardening intensity by more than 200 %, forming a hardening depth of 200–440 μm. Combined treatment leads to a significant increase in wear resistance due to the formation of ultrafine-grained martensitic microstructure with hardness (58–60 HRC5) in the near-surface layer. The combined laser-ultrasonic hardening process control algorithm for surface treatment of structural and tool steels is proposed, limiting the heating temperature, the duration of laser (ultrasonic) exposure, and the vibration amplitudes of the ultrasonic horn. Laser-ultrasonic treatment will allow the formation of a surface layer with a given set of properties, providing increased wear and corrosion resistance. The developed technology can be used for surface hardening and finishing of large-sized steel products in the mechanical engineering industry.

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Optimization of T-Joints Laser Robotic Welding Procedure Parameters from AISI 321 Stainless Steel

Khokhlov

Bernatskyi

Berdnikova

et al. 2022

Smart Technologies in Urban Engineering

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Structure Peculiarities of the Surface Layers of Structural Steel under Laser Alloying

Cited by 6 publications

References 11 publications

Features of the Stress–Strain State of 3D Metal Objects Produced by Additive Microplasma Deposition of the Powder of a Fe–Cr–Ni–B–Si System

Features of the Stress–Strain State of 3D Metal Objects Produced by Additive Microplasma Deposition of the Powder of a Fe–Cr–Ni–B–Si System

Surface quality improvement of steel parts by combined laser-ultrasonic treatment: determination algorithm of technological parameters

Optimization of T-Joints Laser Robotic Welding Procedure Parameters from AISI 321 Stainless Steel

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