Influence of Nb Addition on Phase Transformation of TiNiFe Shape Memory Alloy

Abstract:

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The influence of Nb addition on phase transformation, especially the intermediate R phase transformation and microstructure of TiNiFe shape memory alloys were investigated by means of electrical resistivity, optical microscope, energy dispersive spectroscopy and X-ray diffraction. The results showed that the R phase transformation was inhibited with the increase of Nb content. The martensite start transformation temperature decreased from 227K to 158K when the Nb content increased from 0.5 at.% to 2 at.%. The microstructure of the alloys were mainly characterized by TiNi matrix phase in which Fe and Nb resolved.

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Periodical:

Edited by:

Chengming Li, Chengbao Jiang, Zhiyong Zhong and Yichun Zhou

Pages:

494-499

DOI:

10.4028/www.scientific.net/MSF.687.494

Citation:

H. M. Lai and F. S. Liu, "Influence of Nb Addition on Phase Transformation of TiNiFe Shape Memory Alloy", Materials Science Forum, Vol. 687, pp. 494-499, 2011

Online since:

June 2011

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$35.00

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