First experimental evidence of oxygen ordering in dilute titanium–oxygen alloys

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, tha...

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Bibliographic Details
Published inMaterials research letters Vol. 10; no. 7; pp. 481 - 487
Main Authors Poulain, Régis, Delannoy, Stéphanie, Guillot, Ivan, Amann, Fabienne, Guillou, Raphaëlle, Lartigue-Korinek, Sylvie, Thiaudière, Dominique, Béchade, Jean-Luc, Clouet, Emmanuel, Prima, Frédéric
Format Journal Article
LanguageEnglish
Published Taylor & Francis 03.07.2022
Taylor & Francis Group
Subjects
Condensed Matter
Materials Science
nanoparticles
ordering
oxygen addition
Physics
precipitation
Titanium alloys
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Summary: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.
ISSN:2166-3831
2166-3831
DOI:10.1080/21663831.2022.2057202