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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.07147 |
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| _version_ | 1866917587318734848 |
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| author | Noutack, Martin S. Talla Amann, Fabienne Nowak, Sophie Poulain, Régis Guillou, Raphaëlle Delannoy, Stéphanie Guillot, Ivan Prima, Frédéric Clouet, Emmanuel |
| author_facet | Noutack, Martin S. Talla Amann, Fabienne Nowak, Sophie Poulain, Régis Guillou, Raphaëlle Delannoy, Stéphanie Guillot, Ivan Prima, Frédéric Clouet, Emmanuel |
| contents | Variations with oxygen concentration of titanium lattice parameters are obtained by means of ab initio calculations, considering the impact of oxygen ordering. The quasiharmonic approximation is used to take into account the thermal expansion at finite temperature. Results show that lattice parameters depend mainly on oxygen concentration and, to a lesser extent, on the ordering state. Knowing these theoretical variations, one can get insights into the composition of ordered compounds existing in Ti-O binary alloys from their lattice mismatch measured experimentally by x-ray diffraction. The approach is used in a binary alloy containing 6000 ppm in weight of oxygen. It is concluded that the ordered compounds, which are observed after a recrystallization heat treatment, do not have the expected Ti6O stoichiometry but have a composition close to the nominal concentration. Oxygen ordering proceeds, therefore, before oxygen partitioning in titanium. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_07147 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Impact of oxygen ordering on titanium lattice parameters Noutack, Martin S. Talla Amann, Fabienne Nowak, Sophie Poulain, Régis Guillou, Raphaëlle Delannoy, Stéphanie Guillot, Ivan Prima, Frédéric Clouet, Emmanuel Materials Science Variations with oxygen concentration of titanium lattice parameters are obtained by means of ab initio calculations, considering the impact of oxygen ordering. The quasiharmonic approximation is used to take into account the thermal expansion at finite temperature. Results show that lattice parameters depend mainly on oxygen concentration and, to a lesser extent, on the ordering state. Knowing these theoretical variations, one can get insights into the composition of ordered compounds existing in Ti-O binary alloys from their lattice mismatch measured experimentally by x-ray diffraction. The approach is used in a binary alloy containing 6000 ppm in weight of oxygen. It is concluded that the ordered compounds, which are observed after a recrystallization heat treatment, do not have the expected Ti6O stoichiometry but have a composition close to the nominal concentration. Oxygen ordering proceeds, therefore, before oxygen partitioning in titanium. |
| title | Impact of oxygen ordering on titanium lattice parameters |
| topic | Materials Science |
| url | https://arxiv.org/abs/2402.07147 |