# First experimental evidence of oxygen ordering in dilute titanium-oxygen alloys

3 LA2M - Laboratoire d'Analyse Microstructurale des Matériaux
SRMA - Service des Recherches Métallurgiques Appliquées : DEN/DMN/SRMA
Abstract : Small addition of oxygen is currently used to improve the mechanical properties of titanium. It has been thought, until now, that oxygen fully dissolves in the titanium matrix, thus leading to a solid solution. However, we show here, with transmission electronic microscopy and X-ray diffraction, that oxygen can also form ordered precipitates with a Ti$_6$ O-type structure, even for a concentration as low as 0.15 wt% O. The ordered precipitates found in a series of pure binary Ti-O alloys are also visible in commercially pure titanium, including grades 2 and 4, two compositions widely used for technological applications.
Document type :
Journal articles

https://hal-cea.archives-ouvertes.fr/cea-03652064
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Submitted on : Tuesday, April 26, 2022 - 11:37:32 AM
Last modification on : Wednesday, June 1, 2022 - 9:06:05 AM

### File

Poulain2022_MRL.pdf
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### Citation

Régis Poulain, Stéphanie Delannoy, Ivan Guillot, Fabienne Amann, Raphaelle Guillou, et al.. First experimental evidence of oxygen ordering in dilute titanium-oxygen alloys. Materials Research Letters, Taylor & Francis, 2022, 10, pp.481-487. ⟨10.1080/21663831.2022.2057202⟩. ⟨cea-03652064⟩

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