Ricerc@Sapienza

NiTi shape memory alloys are widely used in various medical and aerospace products because of their outstanding preparties, namely superelasticity and shape memory effect. Joining of dissimilar NiTi shape memory wires can be applied in the design of smart components made up of different functionalities or properties. However, preserving the shape memory effect of the welded regions is really challenging due to the influence of laser heat on the microstructure and consequently activation temperature of the welded samples.

NiTi shape memory alloy (SMA) are widely applied in many industrial domains, such as biomedical, aerospace, automotive and power plants, due to its outstanding functionality including superelasticity (SE) and shape memory effect (SME). The machining process of this material is challenging with a lot of barriers. Accordingly, joining techniques can be an alternative approach to design the shape memory components with more flexibility. Among all methods, laser welding process is a reliable and economical technique for joining of NiTi alloys.