The effects of shape-setting on transformation temperatures of pseudoelastic shape memory alloy springs

Since shape memory alloy (SMA) wires can hardly ever be reliably employed under compressive loadings, SMA springs are developed as axial actuators with the ability of withstanding both tension and compression. In this paper, shape memory alloy helical springs are produced by shape-setting two types of wires: One with shape memory effect (SME) and the other with pseudoelasticity (PE) at the ambient temperature.