Diffusion bonding is an effective method that can avoid microcracks and reduce residual stress obtained between dissimilar materials, so it is chosen for the preparation of TiAl/Ti2AlNb annular component. A new diffusion bonding method is proposed to obtain sufficient and adjustable bonding pressure on the annular interface. The bonding interface is designed as oblique surface, which allows TiAl part dropping. The diffusion bonding finite element (FE) model is established, and the influences of dropping distance and cone angle on bonding pressure are investigated and optimized. The results show that the bonding pressure generates after the dropping and gets stable during the holding. Too large cone angle will cause great bonding pressure difference along the interface. Considering the machine precision, the ideal cone angle is 3°. The best dropping distance is about 3–4% of the radius of the Ti2AlNb component, which will obtain sufficient bonding pressure and avoid great stress concentration at the interface.
TiAl Annular structural component Diffusion bonding Finite element simulation
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This work was financially supported by the National Natural Science Foundation of China (No. 51771150), the National key Research and Development Program of China (No. 2016YFB0701303), and the Natural Science Basic Research Project of Shanxi (No. 2018JM5174).
H. Clemens, W. Smarsly et al., Light-weight intermetallic titanium aluminides—status of research and development. Adv. Mater. Res. 278, 551–556 (2011)CrossRefGoogle Scholar
A. Brotzu, F. Felli, D. Pilone, High temperature oxidation behaviour of TiAl-Cr-Nb-Mo alloys. Intermetallics 43, 131–137 (2013)CrossRefGoogle Scholar
S. Mayer, P. Erdely, F.D. Fischer et al., Intermetallic β-solidifying γ-TiAl based alloys-from fundamental research to application. Adv. Eng. Mater. 19, 1600735 (2017)CrossRefGoogle Scholar
J. Kumpfert, Intermetallic alloys based on orthorhombic titanium aluminide. Adv. Eng. Mater. 11, 851–864 (2001)CrossRefGoogle Scholar
F. Kong, B. Li, Y. Chen et al., Essence of room temperature brittleness of TiAl based alloys and improving approaches. J. Adv. Mater. Covina 39, 33–40 (2007)Google Scholar
X.G. Song, J. Cao, C. Li et al., Interfacial microstructure and joining properties of TiAl/Si3N4 brazed joints. Mater. Sci. Eng. A 528, 7030–7035 (2011)CrossRefGoogle Scholar
H. Dong, Z. Yang, G. Yang et al., Vacuum brazing of TiAl alloy to 40Cr steel with Ti60Ni22Cu10Zr8 alloy foil as filler metal. Mater. Sci. Eng. A 561, 252–258 (2013)CrossRefGoogle Scholar
H.S. Ren, H.P. Xiong, B. Chen et al., Transient liquid phase diffusion bonding of Ti–24Al–15Nb–1Mo alloy to TiAl intermetallics. Mater. Sci. Eng. A 651, 45–54 (2016)CrossRefGoogle Scholar
D. Herrmann, F. Appel, Diffusion bonding of γ (TiAl) alloys: influence of composition, microstructure, and mechanical properties. Metall. Mater. Trans. A 40, 1881–1902 (2009)CrossRefGoogle Scholar
G. Chen, B. Zhang, W. Liu et al., Crack formation and control upon the electron beam welding of TiAl-based alloys. Intermetallics 19, 1857–1863 (2011)CrossRefGoogle Scholar
X.S. Qi, X.Y. Xue, B. Tang et al., Microstructure evolution at the diffusion bonding interface of high Nb containing TiAl alloy. Mater. Sci. Forum 817, 599–603 (2015)CrossRefGoogle Scholar
B. Dogan, X. Zheng, K.H. Bohm, Characterisation of diffusion bond TiAl-Ti 6242 joints. High Temp. Technol. 23, 179–185 (2006)CrossRefGoogle Scholar
H. Li, C. Yang, L. Sun et al., Hot press bonding of γ-TiAl and TC17 at a low bonding temperature by imposing plastic deformation and post heating. Mater. Lett. 187, 4–6 (2017)CrossRefGoogle Scholar
J.Y. Zou, Y.Y. Cui, R. Yang, Diffusion bonding of dissimilar intermetallic alloys based on Ti2AlNb and TiAl. J. Mater. Sci. Technol. 25, 819–824 (2009)CrossRefGoogle Scholar
U. Raab, S. Levin, L. Wagner et al., Orbital friction welding as an alternative process for blisk manufacturing. J. Mater. Process. Technol. 215, 189–192 (2015)CrossRefGoogle Scholar
M.X. Song, H. Zhao, The numerical simulation of residual stress in the diffusion bonding joints by different coefficients of linear expansion. Adv. Mater. Res. 472–475, 1197–1200 (2012)CrossRefGoogle Scholar
Z. Zeng, X. Li, Y. Miao et al., Numerical and experiment analysis of residual stress on magnesium alloy and steel butt joint by hybrid laser-TIG welding. Trans. China Weld. Ins. 50, 1763–1769 (2011)Google Scholar
X. Shen, Y. Li, U.A. Putchkov et al., Finite-element analysis of residual stresses in AlO-TiC/W18Cr4V diffusion bonded joints. Comput. Mater. Sci. 45, 407–410 (2009)CrossRefGoogle Scholar