Abstract
In the present work, tensile loading-unloading tests have been carried out using Ti-50.3at%Ni alloys heat-treated at 673K, 723K and 773K for 3.6ks, 36ks and 360ks under constant temperatures above reverse transformation finish temperature, in order to clarify effects of heat treatment temperature and time on superelastic behavior of the Ti-50.3at%Ni alloy. An increase in the heat treatment temperature decreases the critical stress for slip. The critical stresses for slip of 673K and 723K decrease with increasing heat treatment time. The critical stress for slip of 773K decreases with increasing heat treatment time until 36ks, and it increases at 360ks. The critical stresses for inducing the transformation decrease with increasing heat treatment temperature and time.
