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Interdiffusion Coefficients and Strengthening Effects of Nb, Ta, and Zr in the α2-Ti3Al Phase.

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Title: Interdiffusion Coefficients and Strengthening Effects of Nb, Ta, and Zr in the α2-Ti3Al Phase.
Authors: Haußmann, L.1 (AUTHOR) lukas.haussmann@fau.de, Bresler, J.1 (AUTHOR), Neumeier, S.1 (AUTHOR) steffen.neumeier@fau.de, Pyczak, F.2 (AUTHOR), Göken, M.1 (AUTHOR)
Source: Journal of Phase Equilibria & Diffusion. Aug2024, Vol. 45 Issue 4, p764-771. 8p.
Subjects: Titanium aluminides, Strain rate, Kirkendall effect, Low temperatures, Solid solutions
Abstract: The creep properties of fully lamellar γ/α2 titanium aluminides can be significantly improved by alloying with Nb, Ta or Zr. While the influence of these alloying elements on the γ-phase has already been examined, their diffusivity and strengthening properties in the α2-phase are still lacking. In order to study the effect of Nb, Ta and Zr in α2-Ti3Al, the alloys Ti-33Al, Ti-33Al-5Nb, Ti-33Al-5Ta and Ti-33Al-5Zr were investigated using a diffusion couple approach and strain rate jump tests. The results show that Zr diffuses the fastest, followed by Nb and Ta. Furthermore, these alloying elements also increase the strength compared to a binary Ti-33Al alloy, from which Zr leads to the highest strength increase followed by Ta and Nb. The lower diffusivity of Ta becomes increasingly important at higher temperatures and lower strain rates resulting in a higher strengthening potential than Nb and Zr under such conditions. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Phase Equilibria & Diffusion is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Interdiffusion Coefficients and Strengthening Effects of Nb, Ta, and Zr in the α<subscript>2</subscript>-Ti<subscript>3</subscript>Al Phase.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Phase+Equilibria+%26+Diffusion%22">Journal of Phase Equilibria & Diffusion</searchLink>. Aug2024, Vol. 45 Issue 4, p764-771. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Titanium+aluminides%22">Titanium aluminides</searchLink><br /><searchLink fieldCode="DE" term="%22Strain+rate%22">Strain rate</searchLink><br /><searchLink fieldCode="DE" term="%22Kirkendall+effect%22">Kirkendall effect</searchLink><br /><searchLink fieldCode="DE" term="%22Low+temperatures%22">Low temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Solid+solutions%22">Solid solutions</searchLink>
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  Data: The creep properties of fully lamellar γ/α2 titanium aluminides can be significantly improved by alloying with Nb, Ta or Zr. While the influence of these alloying elements on the γ-phase has already been examined, their diffusivity and strengthening properties in the α2-phase are still lacking. In order to study the effect of Nb, Ta and Zr in α2-Ti3Al, the alloys Ti-33Al, Ti-33Al-5Nb, Ti-33Al-5Ta and Ti-33Al-5Zr were investigated using a diffusion couple approach and strain rate jump tests. The results show that Zr diffuses the fastest, followed by Nb and Ta. Furthermore, these alloying elements also increase the strength compared to a binary Ti-33Al alloy, from which Zr leads to the highest strength increase followed by Ta and Nb. The lower diffusivity of Ta becomes increasingly important at higher temperatures and lower strain rates resulting in a higher strengthening potential than Nb and Zr under such conditions. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Phase Equilibria & Diffusion is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11669-024-01105-y
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        Text: English
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      – SubjectFull: Titanium aluminides
        Type: general
      – SubjectFull: Strain rate
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      – SubjectFull: Kirkendall effect
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      – SubjectFull: Solid solutions
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      – TitleFull: Interdiffusion Coefficients and Strengthening Effects of Nb, Ta, and Zr in the α2-Ti3Al Phase.
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              M: 08
              Text: Aug2024
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              Y: 2024
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