J. Phys. IV France
Volume 112, October 2003
Page(s) 717 - 719

J. Phys. IV France
112 (2003) 717
DOI: 10.1051/jp4:2003983

Influence of casting technology on the phase transformation in NiTiNb alloys

V.N. Slipchenko, Yu.N. Koval and O.V. Koshovy

Institute of Metal Physics, National Academy of Sciences of Ukraine, Vernadsky St. 36, Kiev 03680, Ukraine

The casting properties of NiTi alloyed with Nb are investigated in this paper. Experimental data confirm that the method of alloy fabrication, the remelting technology and mould materials are very important. Master ingots from alloys containing Ni (50)Ti $_{(\rm 50-x)}$Nb $_{\rm x}$, ( $\rm 5<X<10$) have been produced by arc-melting. The remelting was performed in arc-fumace, too. For elaboration of the samples under study, the alloys were poured in the copper mould. Experimentally established temperature intervals of the martensite transformations as well as characteristics of shape recovery for ingots confirm the possibility of using the NiTi-based shape memory alloys as raw materials for casting.

© EDP Sciences 2003