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Hardness enhancement by laser modification of titanium under an auxiliary graphite layer

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Abstract

The present article investigates the effect of graphite powder layers on the titanium surface layer during the treatment by the laser-induced plasma-assisted ablation method. Previous research mainly focuses on studying the effect of laser action on the quality of glass plate processing, rather than observing the changes in the substrate morphology caused by the treatment. Varying laser radiation parameters allowed obtaining the arrays of structures and determining the diagram of hardness values depending on the parameters of laser exposure. The method of laser treatment to increase the hardness of the surface layer under a graphite powder layer in contact with a dielectric transparent layer has been proposed and tested; the method has demonstrated a tenfold increase in the hardness of the surface layer. The results can be used in the improvement of cutting tools performance and applied in mechanical engineering or metalworking.

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Funding

This research was supported by Priority 2030 Federal Academic Leadership Program. X.E., A.S., and K.R. also express their gratitude to the School of Physics and Technology, ITMO University, for the support of students' scientific and research projects.

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XAE conceptualization, methodology, validation, investigation, resources, writing—original draft, writing—review and editing, visualization, project administration, funding acquisition. KAR validation, investigation, resources, writing—review & editing, visualization, funding acquisition. ADS validation, investigation, resources, writing—review and editing, visualization, funding acquisition. SSM investigation (TEM analysis), resources (wearability setup), writing—review & editing. YRK investigation (TEM analysis), resources (wearability setup), writing—review and editing, IVN investigation (TEM analysis), resources (wearability setup), writing—review and editing. DAS conceptualization, methodology, data curation, supervision, funding acquisition.

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Correspondence to X. A. Egorova.

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Study of the structural-phase compositions has been supported by the Theme map for the FRC PCP MC RAS in accordance with the theme of the government assignment, the state registration number AAAA-A19-119111390022-2.

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Egorova, X.A., Rozanov, K.A., Sidorova, A.D. et al. Hardness enhancement by laser modification of titanium under an auxiliary graphite layer. Appl. Phys. A 129, 855 (2023). https://doi.org/10.1007/s00339-023-07119-6

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