Mechanical and Thermomechanical Properties of the Ti50Pd40Ni10 Alloy with a High-Temperature Shape-Memory Effect Studied on a Workpiece in the Form of a Bar in the Annealed State

Abstract

Abstract—Complex studies of the properties of the Ti₅₀Pd₄₀Ni₁₀ alloy (at %) with a high-temperature shape memory effect have been performed using specimens prepared from a 5.86-mm bar in the initial annealed state. Information on the temperatures of phase transformations and mechanical and thermomechanical characteristics of the alloy have been obtained. The maximum values of the shape-memory effect and of the degree of shape recovery were 1.5 and 21%, respectively. This is insufficient to create workable safety devices at this stage. The thermomechanical characteristics determined in this study are comparable with the data we obtained earlier on samples cut out from a 2.04-mm-thick strip. In spite of the rather low values of the thermomechanical characteristics obtained at the first stage of research, this alloy is a promising material, and if obtaining optimum values of working characteristics by varying manufacturing conditions and regimes of heat treatment and deformation, it can be used to create working elements of various safety devices for objects of nuclear power engineering.