Shape Memory Characteristics in Welded SMA Alloys

Abstract

Abstract This paper mainly studies the laser welding properties of shape memory alloys. Phase transformation of the laser welded SMA alloys was investigated through XRD and DSC. The stress-strain behaviors and shape memory effects of the laser weld joints were investigated with tensile tests at room temperature or variable temperature, respectively. DSC test project is the result of the effect and influence of the test welding process on the heat affected zone. The results show that laser welding alloy is beneficial to the refinement of weld structure and improves the mechanical properties and shape memory of weld.