Nb对富钛TiNiAl金属间化合物强化机制的影响

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

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

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

CLC Number:

V252
TG139+6

Meng Lingjie;Li Yan;Zhao Xinqing;Xu Huibin. Effect of Nb on Strengthening Mechanism of Tirich TiNiAl Intermetallics[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2007, 28(5): 1206-1209.

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

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