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Investigation of the Mechanism of Nanostructuring of Near-Surface Titanium Layers under the Influence of Nanosecond Laser Pulses

Abstract

The microstructure of the near-surface layers of submicrocrystalline commercial titanium of grade VT1-0 after laser treatment under a layer of water with nanosecond pulses with an irradiation power density of F = 2 GW/cm2 has been studied. The effect of significant refinement of the initial submicrocrystalline structure to a nanostructured state in a thin near-surface layer with a thickness of about 1 μm thick is revealed. The possibility that nanostructuring of the near-surface layers involves physical mechanisms associated with phase recrystallization or rotational dynamic recrystallization is considered.

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ACKNOWLEDGMENTS

The author is grateful to G.V. Odintsova and Yu.Yu. Karlagina, employees of the International Scientific Laboratory of Laser Micro- and Nanotechnologies and Systems (ITMO University, St. Petersburg, Russia) for their assistance in performing laser treatment experiments.

Funding

The main part of the study, which relates to the investigation of the structural and phase state of commercial titanium, was supported by the Russian Science Foundation, grant no. 19-12-00221. The part of the study that relates to the preparation of thin foils (lamellas) from the specified local regions of the sample was carried out under financial support from the Russian Foundation for Basic Research (grant no. 19-32-90017) on the equipment of the Centers for Collective Use at the Federal Research Center Crystallography and Photonics, Russian Academy of Sciences, and at National University of Science and Technology “MISiS.”

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Correspondence to A. Yu. Tokmacheva-Kolobova.

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Translated by O. Kadkin

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Tokmacheva-Kolobova, A.Y. Investigation of the Mechanism of Nanostructuring of Near-Surface Titanium Layers under the Influence of Nanosecond Laser Pulses. Tech. Phys. Lett. 47, 143–146 (2021). https://doi.org/10.1134/S1063785021020139

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Keywords:

  • titanium
  • pulsed laser processing
  • microstructure
  • nanostructuring.