Heusler Type CoNiGa Alloys with High Martensitic Transformation Temperature


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A strong need exists to develop new kinds of high-temperature shape-memory alloys. In this study, two series of CoNiGa alloys with different compositions have been studied to investigate their potentials as high-temperature shape-memory alloys, with regard to their microstructure, crystal structure, and martensitic transformation behavior. Optical observations and X-ray diffractions confirmed that single martensite phase was present for low cobalt samples, and dual phases containing martensite and γ phase were present for high cobalt samples. It was also found that CoNiGa alloys in this study exhibit austenitic transformation temperatures higher than 340°C, showing their great potentials for developing as high-temperature shape-memory alloys.



Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.




Y. Q. Ma et al., "Heusler Type CoNiGa Alloys with High Martensitic Transformation Temperature", Materials Science Forum, Vols. 546-549, pp. 2241-2244, 2007

Online since:

May 2007




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