Superelasticity preservation in dissimilar joint of NiTi shape memory alloy to biomedical PtIr

Laser microwelding was used to join, for the first time, superelastic NiTi biomedical PtIr which can be in multicomponent devices. By process optimization, it possible control formation of B2 NiTiPt phase, with no intermetallic compounds being formed. The phase inside fusion zone had a strong metallurgical bonding base material due smooth transition its grain orientation towards ?111? NiTi. major finding present work is preservation response welded joint as evidenced by load/unloading cycling up 6% strain, significantly higher than typically required applications.