Effect of heat treatment and deviation from stoichiometry on the structure and physical properties of titanium nickelide

Abstract

1. Alloys containing 48–50 at. % Ni are not hardened from 980°, while β phase is formed after quenching of alloys with >50.8% Ni. 2. The properties of quenched alloys do not change as the result of holding at room temperature for as long as 5500 h. 3. Prolonged annealing at 500–450° leads to formation of finely dispersed phase and lower electrical resistivity of alloys with 50.2–51.8 at. % Ni. Alloys with 49.8–50.2 at. % Ni are insensitive to all the heat treatments tested.