All About Nitinol Shape Memory Sheet
Nitinol Shape Memory Sheet is unique in comparison to earlier SMAs in that it is low-cost, corrosion-resistant, and has no harmful effects. The exact ratio of nickel and titanium is 55% and 45%, respectively, and, while appearing to be relatively equal proportions, a minor difference has a tremendous effect on the transition temperature.
Nitinol Shape Memory Sheet is the most well-known example of a shape memory alloy. It’s a nickel-titanium alloy. The novel compound was named NiTiNOL by the team of researchers that found it. It is a nickel-titanium alloy with nearly equimolar proportions that possess exceptional memory qualities. Shape memory occurs when a material, following plastic deformation, returns to its original shape after light heating. Solid phase transitions can be caused by two completely different causes. The most prevalent is the displacement of atoms from their equilibrium locations by a process known as diffusion in order to adopt a more stable new structure under the pressure and temperature conditions found in the material.
Nitinol Shape Memory Sheet Metal Properties
Nitinol possesses all of the qualities associated with shape memory alloys.
- Memory in general
- Martensitic thermoelastic transition
- Memory duplication
- Pseudoelasticity
- Superplasticity
- Damping ability
- Density: 6.45 grams per cubic centimeter
- Temperature range for transformation: -200 to 100oC
- Melting point: 1300oC (2370oF)
- Excellent corrosion performance
Applications of Nitinol Shape Memory Sheet
- Nitinol’s qualities have proven beneficial in a variety of domains, including military applications, security, and robotics. However, the most inventive and relevant use appears in the medical sphere. Tweezers and scissors for orthodontic procedures, as well as wire guides and vascular probe guides, have all been improved.
- Nitinol is one of the most often utilized alloys due to its biocompatibility and low cost, but other alloys with shape memory include copper-aluminum-nickel, copper-zinc-aluminum, and iron-manganese-silicon.
- Lens frames, golf clubs, coffee container thermostats, electrical connectors, solar screens, clamps, and structural vibratory elements to decrease the influence of earthquakes are further examples of its usage. A spoon that twists when it comes into touch with boiling water has been designed for amusement.
- Memory alloys are also used to deploy solar panels and satellite antennae, as well as to control the balance of helicopter blade rotors
Most Important Applications
Applications In Medicine
The most essential feature for medical applications is that Nitinol is compatible with the human body and does not cause rejection. Nitinol wires, for example, have been used to construct micropumps that can replace functions of the heart or kidneys, as well as to decongest obstructed arteries (stents), and are frequently employed in orthodontics.
Coating Tight
The Cryofit hydraulic connection is without a doubt the best example of application in this industry. These anchors are made as sleeves that are only slightly smaller than the metal pipe to be joined. Its diameter expands during martensite then shrinks and holds securely after heating to austenite. Because of the tubes, the coupling cannot recover its original diameter, and the tension generated is often greater than that of a weld.
Force of Action
In some applications, the memory component is designed to exert force in a variety of movements across a number of cycles. Memory alloys are utilized in these electrical connector systems to force the spring open when the connector is hot. This allows for the force-free insertion or removal of a circuit card from the connector. The NiTi weakens after cooling, and the spring easily deforms it while the board is tightly closed and the connections are made.
Applications with high elasticity
A number of goods having pseudo-elastic (or super-elastic) qualities have entered the market. NiTi eyeglass frames have been created to withstand massive deformations without breaking. Others are orthodontic wires, which must tolerate a significant deal of adjustments.
