Thermo-Mechanical Properties of Ti-Ni-Cu Shape Memory Alloy Fabricated by Pulse-Current Sintering Method

Abstract

This paper aims to find the influence of Cu addition (replacing Ni fraction) up to 14% on mechanical properties and material properties of Ti-Ni shape memory alloy fabricated by pulse-current sintering method. The properties examined here are microstructure, the thermo-mechanical properties, the cyclic deformation characteristics and others. The temperature-response of the alloy was fairly improved by Cu addition. Increasing in adding amount of Cu resulted in a decreasing in the stress level at cyclic deformation testing. It was found that the cyclic deformation relatively made the thermo-mechanical behaviors of the alloy stable.