Welding of NiTi alloy with dissimilar metals and its application in aerospace equipment manufacturing

NiTi alloy is a shape memory material with significant industrial value, boasting excellent shape memory properties, wear resistance, superelasticity, and biocompatibility. It holds extremely broad application prospects in many fields. However, due to its inherent high processing difficulty, in order to meet the lightweight requirements of NiTi shape memory alloy structural parts in the use process, NiTi shape memory alloy often needs to be welded with another easily processable material. The welding of heterogeneous materials can not only give full play to the performance advantages of the material itself, but also greatly reduce the problem of system integration caused by the material. This article primarily introduces fusion welding and solid-state welding methods for joining NiTi shape memory alloys with dissimilar metals, analyzing the main challenges faced during the welding process and their corresponding solutions. Finally, based on the welding of NiTi shape memory alloys with dissimilar metals, the article discusses their applications in the field of aerospace equipment manufacturing. The aim of this article is to provide readers with an understanding of the research progress in welding NiTi shape memory alloys with dissimilar metals, while offering insights for optimizing the quality of heterogeneous metal welded joints.