Abstract
In general, reusable heat energy is wasted in most power plans. We have been developing a heat engine that utilizes shape memory alloy (SMA) wires that are supplied with hot and cold water. So, it is important to investigate the fatigue strength of SMA wires under different conditions. The purpose of this research is to test the fatigue strength of the SMA wires under thermal pressure during phase transformations. As a result, the fatigue tests and the FEM analysis show that the fatigue life increases with lowering the heating temperature and wire diameter.
