Effects of Nb on the High Temperature Mechanical Properties of TiNiAl Alloys


Article Preview

A series of NiTiAl based alloys with different amount of Nb addition were prepared and the effects of Nb on both the mechanical properties and microstructure evolution were investigated. The addition of Nb can remarkably enhance the high temperature yield strength of these alloys. The highest yield strength of the alloys with 10 at% Nb reaches 1237MPa at 873K and 875MPa at 973K, respectively. The Ti2Ni(Al,Nb) precipitates and the solution strengthening effect might be responsible for the high yield stress achieved at high temperature.



Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.




G. S. Qiu et al., "Effects of Nb on the High Temperature Mechanical Properties of TiNiAl Alloys", Materials Science Forum, Vols. 546-549, pp. 1477-1480, 2007

Online since:

May 2007




[1] K.J. Hemker, D.M. Dimiduk, H. Clemens, R. Darolia, et. al. See, for example, Structural Intermetallics 2001. TMS, (2001).

[2] T.W. Duerig , K. Melton, J.L. Proft , Engineering Aspects of Shape Memory Alloys, London: Btterworth-Heinemann, 1990: 130.

DOI: https://doi.org/10.1016/b978-0-7506-1009-4.50015-9

[3] Y. Koizumi, Y. Ro, S. Nakazawa, H. Harada, Materials science and Engineering A223(1997)36-41.

[4] P. Warren,Y. Murakami,Y. Koizumi, H. Harada, Materials Science and Engineering A223 (1997)17-2.

[5] J. Jung, G. Ghosh, G,B. Ohson. Acta Materialia 51(2003)6341-63.

[6] H.B. Xu, L.J. Meng, J. Xu, Y. Li, X.Q. Zhao�The 6th International Workshop on Advanced Intermetallics and Metallic Materials. submitted for publication, (2006).

[7] Gogia A K, Banerjee D, Nandy T K. Room temperature tensile properties and microstructure of Ti3Al-Nb alloys. Metallurgical Trans, 1990, 21A: 609~616.

[8] H.T. Wegkamp, D.R. Baker, D.M. Paxton, etal. Continuous cooling transformations in Ti3Al+Nb alloys. Scripta Metall Mater, 1990, 24(3): 445~450.

DOI: https://doi.org/10.1016/0956-716x(90)90180-o

[9] Y.W. Kim, etal. Niobium for High Temperature Applications[C]. TMS, 2004. 153.

[10] Y.Z. Yang, X.Q. Zhao, etal. Acta Metall Sinca, VOl41No. 6, June 2005: 627-631. 0 10 20 30 40 0 160 320 480 (a) 2at% Nb (b) 4at% Nb (c) 6at% Nb (d) 8at% Nb (e) 10at% Nb (e) (d) (c) (b) (a) Compresive stress (MPa) Strain(%) 1073K.