Nickel Titanium Shape Memory Alloy Plate and Sheet

We make Nickel-titanium shape memory alloy plates and sheets according to standard ASTM F 2063 for Medical Devices and Surgical Implants. This specification covers the chemical, physical, mechanical, and metallurgical requirements for wrought nickel titanium bars, flat rolled products, and tubing containing nominally 54.5 % to 57.0 % nickel and used for producing medical devices and surgical implants. Requirements are for mill products, measuring 6 to 130 mm (0.24 to 5.12 in.) in diameter or thickness, in their annealed condition.

Nickel-titanium shape memory alloy(Nitinol shape memory alloys) is a functional titanium alloy with a shape memory effect. The object is deformed by force at a certain temperature, and after removing the external force it still maintains the shape after deformation, but it can automatically recover to the original shape before deformation at a higher temperature, this phenomenon is known as the shape memory effect.

Titanium-nickel shape memory alloy titanium-nickel is an intermetallic compound of equal atomic ratio (Ti50Ni50), the practical alloy composition is Ti-(49-51)%Ni (atomic fraction). The titanium-nickel intermetallic compound is ductile and can be hot and cold worked, with a cold working rate of 10% to 25% and a recrystallization temperature of 500 to 600°C. Titanium-nickel alloy has excellent corrosion resistance in the high-temperature phase, good damping in the low-temperature phase, and peculiar memory properties and superelasticity in the phase change region. The physical properties, mechanical properties, and memory properties of titanium-nickel alloy are shown in Table 1 and Table 2, respectively. (AS is the beginning temperature of martensite reversal into the parent phase, and Af is the end temperature of martensite reversal into the parent phase).

Table 1 Physical and mechanical properties of Nickel-titanium shape memory alloy plates and sheets（Niti Nitinol SMA）

Table 2. Performance property of Nitinol SAM sheets and plates( Nickle-titanium shape memory alloy)

Advantages and applications:

Nickel-titanium alloy plates have a smooth surface, high dimensional accuracy, good plasticity, and cold processing deformation of up to 40% or more, after treatment can obtain excellent super elasticity, widely used in medical bone plates, collection antenna, dental orthodontics, eyeglass frame and foot wire, bra bracket, instrumentation, aviation, aerospace, electronics, petroleum, chemical, pharmaceutical, and other fields, our company uses the multi-directional special processing technology and advanced performance testing instruments to ensure the quality of products and we win trust and support from our many customers.

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Keywords

Nickel-titanium shape memory alloy plates and sheets; NiTi,  Nickel-titanium alloy, TiNi; nitinol; Titanium-nickel alloys; titanium-nickel alloys; orthopedic medical devices; shape memory alloys; stents; superelastic alloys; surgical implants; vascular devices;