Dissimilar Laser Welding of a NiTi Shape Memory Alloy to Ti2AlNb

NiTi-based shape memory alloys and the Ti2AlNb alloy have gained increasing importance in aerospace field. The joining of these two materials can further increment usage relevant engineering expand their potential applications. However, when to Ti-based alloys, formation brittle Ti-rich intermetallic compounds often occurs, significantly limiting functionality use. Dissimilar joints between a NiTi were obtained using 0.1 mm thick Niobium (Nb) interlayer via laser welding. By process optimization, sound obtained. microstructure evolution was assessed by means electron microscopy, whereas mechanical strength evaluated lap shear tensile testing. best performing seen fracture at maximum loads above 1230 N, thus allowing us consider this dissimilar pair for structural