The function of NiTinol-titanium shape memory alloy
志联
2025-04-20
Due to its unique shape memory alloy properties, NiTinol-titanium shape memory alloy also possesses advantages such as superelasticity, wear resistance, and corrosion resistance, thus finding extremely wide applications in multiple fields.
(1) Mechanical Engineering
The application of NiTinol-titanium shape memory alloy in the mechanical industry initially focused on pipe joints and fasteners. Specifically, in the connection of mechanical parts, pipelines, etc., the interface for in-flight refueling of aircraft uses NiTinol-titanium shape memory alloy processed into sleeves with an outer diameter 3% larger than the inner diameter, and the diameter is expanded by about 8% at a certain temperature. During assembly, the sleeve is taken out from liquid nitrogen, and the pipe is inserted from both ends. If the temperature rises to room temperature, the temperature can be changed using electric heating. The NiTinol-titanium shape memory alloy deforms at the in-flight refueling interface, and the sleeve made of NiTinol-titanium shape memory alloy shrinks to form a tight seal, thus achieving a tight, leak-proof effect, far superior to traditional welding. Therefore, NiTinol-titanium shape memory alloy is particularly suitable for aerospace, shipbuilding, oil pipelines, and other fields. In locations where construction is inconvenient, NiTinol-titanium shape memory alloy can be used to make pins, which are inserted into holes and heated. Therefore, using the temperature-sensitive driving multiple functions of NiTinol-titanium shape memory alloy, robots and manipulators can be made.
(2) Construction Industry
As mentioned earlier, the various characteristics of NiTinol-titanium shape memory alloy, combined with its structure, can enhance the system's damping and reduce the dynamic response of the structure, thus creating various forms of damping energy dissipation devices. It can also be used to design vibration isolators, using the deformation of the NiTinol-titanium shape memory alloy to increase energy dissipation through deformation displacement, preventing the transmission of seismic energy from the structure to the upper structure, thus protecting the upper structure and truly enhancing the seismic performance of the structure.
(3) Aerospace Industry
In aircraft hydraulic systems, almost every aircraft requires the use of eight hundred NiTinol-titanium shape memory alloy connectors. Since the 1970s, most US Navy aircraft have used this type of pipe connector, and there is no record of failure. In addition, NiTinol-titanium shape memory alloy can also be used in spacecraft antennas and electromechanical actuators.
(4) Automotive Industry
NiTinol-titanium shape memory alloy is mainly used in engine heat dissipation fan clutches, exhaust nozzles, and diesel radiator.
(5) Medical Field
NiTinol-titanium shape memory alloy has high mechanical properties and biocompatibility, making it widely used in the medical field. For example, in orthodontics, cosmetic surgery, minimally invasive cardiovascular procedures; thrombus filters are actually a new product of NiTinol-titanium shape memory alloy; the straightened filter, after being implanted in the vein, gradually forms a network over time, preventing more than 90% of blood clots from flowing to the heart, lungs, and other organs. In addition, NiTinol-titanium shape memory alloy is also used in medical clinical trials for surgical sutures, artificial joints, and artificial hearts.
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