Influence of Nb, Ta and Zr on the Interdiffusion Coefficients and Solid Solution Strengthening of γ-TiAl Single Phase Alloys
نویسندگان
چکیده
The alloying elements Nb, Ta and Zr improve the creep properties of fully lamellar γ/α2 titanium aluminides significantly. Since high temperature deformation mainly occurs in γ-phase aluminides, diffusivity solid solution hardening effect these three is studied by analyzing concentration gradients resulting hardness across interdiffusion zone diffusion couples energy dispersive X-ray diffraction nanoindentation. results reveal that has highest coefficient but also largest coefficient. mechanical single Ti-54Al-5X alloys were investigated strain rate jump tests. addition 5 at.% Nb or lead to an increased strength compared a binary γ-Ti-54Al alloy. Zr-containing γ-TiAl alloy reveals at 750 °C 900 °C, which discussed be due strong Zr. However, comparison other alloys, Ti-54Al-5Zr shows quite brittle behavior up °C. lower leads higher Ta-modified
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ژورنال
عنوان ژورنال: Metals
سال: 2022
ISSN: ['2075-4701']
DOI: https://doi.org/10.3390/met12050752