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The Finite Element Simulation of Diffusion Bonding for TiAl/Ti2AlNb Annular Structural Component

  • Xiaoqiang ZhangEmail author
  • Bin TangEmail author
  • Jinshan Li
  • Hongchao Kou
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 217)

Abstract

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.

Keywords

TiAl Annular structural component Diffusion bonding Finite element simulation 

Notes

Acknowledgements

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).

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’anChina

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