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A two-layer process and the optimal blank design for the hollow titanium wide-chord fan blade with complex geometries
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College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics

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Science and Technology Support Program of Jiangsu Province (BE2013123)

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    Abstract:

    This paper concentrates on the forming of a hollow wide-chord titanium fan blade with complex geometries by a more efficient and simple way. A new two-layer process based on hot forming and diffusion bonding is developed. An essential approach for optimal blank design is proposed. The presented process employed a more reliable and controllable method to construct the internal ribbons, instead of the complicated superplastic forming in contemporary multi-layer approaches. To evaluate the practicability, the numerical method is used to investigate the thickness uniformity, structural integrity and skin defects of forming results by ABAQUS. A series of experiments were conducted to validate the simulation results. The Ti-6Al-4V alloy was adopted as the forming material, and blanks optimal designed by the proposed approach were used. The scaled-down version of the hollow wide-chord fan blade was successfully formed without defects. In addition, it is observed that the experimentation and simulation agree well.

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[Minghe Chen, Xinchen Wu, Lanshen Xie, Ning Wang, Nan Su. A two-layer process and the optimal blank design for the hollow titanium wide-chord fan blade with complex geometries[J]. Rare Metal Materials and Engineering,2019,48(6):1717~1724.]
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History
  • Received:January 06,2018
  • Revised:March 01,2018
  • Adopted:March 12,2018
  • Online: July 26,2019
  • Published: