Effect of heat-treatment conditions on the structure and phase transformations in the shape-memory 45Ti–45Ni–10Nb alloy in as-cast and extruded states

Abstract

The effect of the types and conditions of heat treatment on the element composition, microstructure, phase composition, kinetics and temperatures of phase transformations, crystal lattice and substructure parameters, and mechanical characteristics of the shape-memory 45Ti–45Ni–10Nb (at %) alloy in the ascast and extruded states was studied. The interrelation between the structure features of the alloy and its mechanical characteristics was found. The conditions of heat treatment and the state of the alloy, which assure its high mechanical characteristics, were determined.