J0404-6-2 Actuator of Shape Memory Alloy added two-way performance by shot-peening treatment

Abstract

To obtain the two-way shape memory effect, a shot-peening treatment is applied to a shape memory alloy. The shot-peening region works as a bias spring. The experimental result shows that 0.2 % two-way strain can be obtained by this treatment. In addition, a simple model which can estimate the residual stress measure and the effective depth of the shot-peening is proposed.