Cyclic Response and Fatigue Life of TiAl Alloys at High Temperatures

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Fatigue properties of the new generation of TiAl alloys with 8at.% of Nb were studied and compared with those reported in the literature for previous generation with 2at.% of Nb. The high Nb content improves substantially the fatigue life time in the Basquin representation. Nevertheless, the fracture behaviour is still rather brittle even at 750°C. TEM study of the material after the fatigue testing was performed. The dislocation activity is concentrated in the  phase. The properties and behaviour of individual dislocations seem to be similar as those observed in single -phase TiAl alloys.

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Periodical:

Key Engineering Materials (Volumes 417-418)

Edited by:

M.H Aliabadi, S. Abela, S. Baragetti, M. Guagliano and Han-Seung Lee

Pages:

585-588

Citation:

T. Kruml et al., "Cyclic Response and Fatigue Life of TiAl Alloys at High Temperatures", Key Engineering Materials, Vols. 417-418, pp. 585-588, 2010

Online since:

October 2009

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$38.00

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