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

Haußmann L, Bresler J, Neumeier S, Pyczak F, Göken M (2024)

Publication Type: Journal article

Publication year: 2024

Journal

DOI: 10.1007/s11669-024-01105-y

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.

Authors with CRIS profile

Involved external institutions

Helmholtz-Zentrum Hereon Germany (DE)

How to cite

APA:

Haußmann, L., Bresler, J., Neumeier, S., Pyczak, F., & Göken, M. (2024). Interdiffusion Coefficients and Strengthening Effects of Nb, Ta, and Zr in the α2-Ti3Al Phase. Journal of Phase Equilibria and Diffusion. https://doi.org/10.1007/s11669-024-01105-y

MLA:

Haußmann, Lukas, et al. "Interdiffusion Coefficients and Strengthening Effects of Nb, Ta, and Zr in the α2-Ti3Al Phase." Journal of Phase Equilibria and Diffusion (2024).

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