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Research Article

Surface modifications of biometallic CP-Ti and Ti-13Nb-13Zr alloy by picosecond Nd:YAG laser

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  • Received: 21 February 2020Revised: 7 April 2020Accepted: 9 April 2020Available online: 12 April 2020
  • The effect of picosecond Nd:YAG laser irradiation on chemical and morphological surface characteristics of the commercially pure titanium (CP-Ti) and Ti-13Nb-13Zr alloy in the air and argon atmosphere was studied for different laser output energy values. During the interaction of laser irradiation with investigated materials, part of the energy was absorbed on the target surface influencing the surface modifications. Laser beam interaction with the target surface resulted in various morphological alterations and as a result crater formation and presence of microcracks and hydrodynamic structures were observed. Moreover, different chemical changes on the target materials surfaces were induced resulting in the titanium oxide formation in the irradiation affected area and consequently increasing the irradiation energy absorption. Due to the higher energy absorption at the site of the interaction, the dimensions of the surface damaged area increased. Consequently, surface roughness increased. Appearance of the surface oxides also leads to the increase of the material hardness in the surface-modified area. Observed chemical and morphological changes were more pronounced after laser irradiation of the Ti-13Nb-13Zr alloy surface.
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Surface modifications of biometallic CP-Ti and Ti-13Nb-13Zr alloy by picosecond Nd:YAG laser

  • Corresponding author:

    Ivana Cvijović-Alagić    E-mail: ivanac@vinca.rs

  • 1.  Institute of Nuclear Sciences „Vinča“, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia
  • 2. Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia

Abstract: The effect of picosecond Nd:YAG laser irradiation on chemical and morphological surface characteristics of the commercially pure titanium (CP-Ti) and Ti-13Nb-13Zr alloy in the air and argon atmosphere was studied for different laser output energy values. During the interaction of laser irradiation with investigated materials, part of the energy was absorbed on the target surface influencing the surface modifications. Laser beam interaction with the target surface resulted in various morphological alterations and as a result crater formation and presence of microcracks and hydrodynamic structures were observed. Moreover, different chemical changes on the target materials surfaces were induced resulting in the titanium oxide formation in the irradiation affected area and consequently increasing the irradiation energy absorption. Due to the higher energy absorption at the site of the interaction, the dimensions of the surface damaged area increased. Consequently, surface roughness increased. Appearance of the surface oxides also leads to the increase of the material hardness in the surface-modified area. Observed chemical and morphological changes were more pronounced after laser irradiation of the Ti-13Nb-13Zr alloy surface.

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