Three-Dimensional Printing of Shape Memory Alloys


Article Preview

A novel variant of the three-dimensional printing technique has been developed and used to manufacture NiTi parts. Instead of metal powder the process uses granules, which consist of a mixture of metal powder and organic binder. These granules are spread on a working table. Then a solvent is dispensed with a printer head to consolidate a selected area of the granule bed and the table is moved down. The "solvent on granule" printing process is repeated until a threedimensional green body is obtained. The green part is finally debinded and sintered to obtain a dense and fully metallic part. NiTi parts have been successfully produced by this technique with densities of about 95% of the theoretical density. Detailed information on the microstructure has been obtained by X ray diffraction. Sintered parts exhibit shape memory effect, which has been measured during thermal cycling under tensile stress.



Materials Science Forum (Volumes 534-536)

Edited by:

Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim




E. Carreño-Morelli et al., "Three-Dimensional Printing of Shape Memory Alloys", Materials Science Forum, Vols. 534-536, pp. 477-480, 2007

Online since:

January 2007




[1] D. E. Aslanidis, Proc. of the First European Conference on Shape Memory and Superelastic Technologies, SMST 99, Antwerp Zoo, Belgium (1999) pp.384-411.

[2] K. Otsuka and C.M. Wayman, Shape Memory Materials, Cambridge University Press, (1998).

[3] E. Sachs, J. Haggerty, M. Cima, and P. Williams, Three-Dimensional Printing Techniques U.S. Patent No. 5204055 (1993).

[4] E. Carreño-Morelli and S. Martinerie, Proc. of European Conference on Powder Metallurgy, Prague, 2-5 October 2005, pp.61-65.

[5] B. Bertheville, S. Martinerie and J. -E. Bidaux, Proc. of European Conference on Powder Metallurgy, Valencia, 20-22 October 2003, pp.61-416.

[6] J. C. Hey, A. P. Jardine, Mater. Sci. Eng. (1994) A188, 291-300.