Titanium-Nickel Alloy Wire

Titanium-nickel alloy wire is a type of shape memory metal. Shape memory alloys are special alloys that can automatically recover their original shape from plastic deformation at a certain specific temperature.

It has a stretch rate of over 20%, a fatigue life of up to 1×10⁷ cycles, and damping characteristics ten times higher than ordinary springs. Its corrosion resistance is superior to the best medical stainless steel currently available, making it suitable for various engineering and medical applications. It is an excellent functional material.
 

As the name suggests, Application Of Titanium-Nickel Alloy Wire in Eyeglass Frames is a binary alloy composed of titanium and nickel. It has two different crystal structure phases due to changes in temperature and mechanical stress: the austenite phase and the martensite phase. The phase transformation sequence during cooling of titanium-nickel alloy is parent phase → R phase → martensite phase. The R phase is rhombohedral, while austenite appears at higher temperatures (above the austenite start temperature) or under unloaded conditions. Austenite is cubic, hard, and relatively stable in shape. The martensite phase occurs at relatively lower temperatures or under loading, is hexagonal, ductile, reversible, less stable, and more prone to deformation.

Shape Memory Effect: Shape memory refers to the phenomenon where a parent phase of a certain shape, after being cooled from above the Af temperature to below the Mf temperature to form martensite, can be deformed at temperatures below Mf and then automatically return to the original shape of the parent phase upon heating back to above Af temperature, accompanied by reverse phase transformation. In fact, the shape memory effect is a thermally induced phase transformation process of nickel-titanium alloy.

Superelasticity: Superelasticity refers to the phenomenon where the specimen exhibits strains much greater than the elastic limit under external force, and the strain automatically recovers upon unloading. That is, in the austenite state, due to the applied stress, a stress-induced martensitic transformation occurs, which gives the alloy mechanical behavior different from ordinary materials. Its elastic limit is far higher than ordinary materials and no longer follows Hooke's law. Compared to the shape memory effect, superelasticity does not involve heat. In summary, superelasticity refers to the condition where stress does not increase with increasing strain within a certain deformation range. Superelasticity can be divided into linear superelasticity and nonlinear superelasticity.

With the increasing demand for comfort and durability in eyewear,Application Of Titanium-Nickel Alloy Wire in Eyeglass Frames memory glasses frames are gradually gaining popularity in the market. Especially for sports glasses, children's glasses, and situations where glasses need frequent adjustments, titanium-nickel alloy memory frames are favored for their unique advantages.

Titanium-nickel alloy memory glasses frames are popular among consumers due to their lightweight, durable, and comfortable characteristics. In the market, there are many brands offering titanium-nickel alloy memory glasses frames, such as Yingfeilaisi, Lanshuweiting, Dikelang, Xiangshihengji, and Jiamiliwei.

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