Modeling of Titanium Oxide Layer Growth Produced by Fiber Laser Beam

Abstract

In this paper, we study the oxidation process during the heating of a titanium metallic surface by a Nd-YAG fiber pulsed laser beam under air environment. For this, we adopted an approach that considers a three-dimensional heat diffusion model coupled with an oxidation parabolic law (oxidation kinetics). The heat diffusion equation solved numerically, gives the temperature field. The oxide film growth is simulated by implementing a dynamic mesh technique. We developed computational procedures UDFs (User Defined Function) running interactively with the Fluent fluid dynamics software [ that implements the finite volume method. These UDFs are developed to insert the oxidation law, the temperature field, the specific boundary conditions and the mesh deformation into the calculation.

Chromium oxide formation on nanosecond and femtosecond laser irradiated thin chromium films

“…The nanosecond and femtosecond laser beams interact differently with the chromium thin films due to a difference in the heat profiles during energy deposition [18,19]. In the case of nanosecond laser beam, initially, the nanosecond beam is absorbed by the electronic gas of the atoms in the coating, thus resulting in a rapid increase of the electronic temperature.…”