Research on the Weathering Ability of NITI Shape Memory Alloys

Abstract

In engineering practice, shape memory alloys need to keep stable basic properties such as memory effect and super elasticity in a different climate environment. In order to get the weather resistance of SMA, this article uses the high/low temperature test chamber to simulate different climate environments. The same parameters and the same batch of the SMA wires are taken as experimental objects. SMA wires static stretching experiments are performed after environmental box test. The experimental research shows, the SMA materials do not loss the basic mechanical properties for the environmental changes. The SMA wire stress changes can be neglected. The more cycles it takes, the larger residual strain it remains. After more than 120 cycles, the residual strain becomes stable and the SMA wires show good weathering ability.