Influence of casting technology on the phase transformation in NiTiNb alloys

Abstract
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 Nb , ( ) 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.