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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2007, Vol. 28 ›› Issue (5): 1206-1209.

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Effect of Nb on Strengthening Mechanism of Tirich TiNiAl Intermetallics

Meng Lingjie,Li Yan,Zhao Xinqing,Xu Huibin   

  1. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics
  • Received:2006-07-13 Revised:2006-12-04 Online:2007-10-15 Published:2007-10-15
  • Contact: Li Yan

Abstract:

The effects of Nb on the microstructure and properties of Ti50Ni42Al8 alloys are studied through compressive test, scanning electronic microscopy and Xray diffraction measurements. The results indicate that the compressive strength of Ti50Ni42Al8Nb2 in the range from room temperature to 700 ℃ significantly increases with the Ni content. The compression strength and specific strength at 600 ℃ are 1 237 MPa and 216 MPa/(g·cm-3), respectively, exceeding those of superalloy Rene95.

Key words: intermetallic , compound,  , strengthening , mechanism,  , compressive , test,  , high , temperature , strength, TiNiAl

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