Superelasticity of Nitinol Wires

Overview of Nitinol Powder

Nitinol is a metal alloy of nickel and titanium in which the atomic percentages of the two elements are approximately equal. Different alloys are named according to the weight percent of nickel, such as nickel. Nitinol 55 and Nitinol 60. Displays shape memory effect and superelasticity at different temperatures. Miron Nitinol powder, Ni-Ti alloy powder particle size: 15-53 microns Ni:Ti:5:5

What memory alloy is Nitinol? Nitinol is a shape memory alloy, a special alloy that can automatically restore its plastic deformation to its original shape at a certain temperature. Its expansion rate is more than 20%, its fatigue life is 7 times that of 1*10, its damping characteristics are 10 times that of ordinary springs, and its corrosion resistance is better than the best medical stainless steel at present, so it can meet various requirements in engineering It is an excellent functional material that can meet the needs of medical applications.

In addition to its unique shape memory function, memory alloys also have excellent properties such as wear resistance, corrosion resistance, high damping and superelasticity.

What are the properties of Nitinol? Nitinol has two closely related and unique properties: the shape memory effect and superelasticity (also known as pseudoelasticity). Shape memory is the ability of Nitinol to deform at a certain temperature, retain its deformed shape after the external force is removed, and then return to its original undeformed shape when heated above its "transition temperature". Superelasticity is the ability of a metal to undergo large deformations and immediately return to its undeformed shape after removal of an external load. The amount of deformation of Nitinol is 10 to 30 times that of ordinary metals, and it can restore its original shape. Whether Nitinol exhibits shape memory effect or superelasticity depends on whether it is above a specific transformation temperature of the alloy. Below the transition temperature, it exhibits a shape memory effect.

Superelasticity of Nitinol Wires

This "superelastic" effect allows the use of nitinol wire devices that have been bent or shaped to allow for introduction or use in vivo. Tools such as small grasping and biopsy devices can protrude from the tube and extend over a much larger area than devices made from standard alloys. Nitinol's reduced weight and unique properties make it particularly attractive for biomedical applications including heart valve tools, stents, nails, bone anchors, complex septal defect devices and various implants.

 However, heat-treating nitinol is delicate—critical for fine-tuning the transition temperature. Aging time and temperature control the precipitation of various nickel-rich phases, thereby controlling the nickel content in the nickel-titanium lattice. Aging increases the transition temperature by depleting the nickel matrix. The combination of heat treatment and cold working is very important to control the properties of Nitinol.

Applications of Nitinol Powder

Nitinol powder can meet the needs of various engineering and medical applications and is an excellent functional material. In addition to its unique shape memory function, memory alloys also have excellent functions such as wear resistance, corrosion resistance, high damping and superelasticity.

The tensile strength of Nitinol can reach 1000 MPa, which means that it takes more than 100 grams per square millimeter to break it. This force is stronger than ordinary steel, and it also has good "memory" properties and corrosion resistance.

Nitinol is 50% nickel and 50% titanium, which means 50% nickel and 50% titanium. The temperature range of the shape memory can be adjusted by the control element. Generally, the higher the nickel content of Nitinol, the lower the working temperature. When it contains 55% nickel and 45% titanium, the memory alloy can work at room temperature.

People take advantage of this property of shape memory alloys to make pearl necklaces and bracelets made of shape memory alloy wires, as well as bras woven from shape memory alloy wires. Wearing these decorations and health products on the body will restore the original curvature and rigid body temperature under the action, thus playing the role of decoration and health care. In addition, you can use Nitinol to make orthodontic wires to straighten deformed teeth according to the human oral temperature.

Nitinol can be used to replace traditional actuators (solenoid valves, servo motors, etc.), such as the simple hexapod robot Stiquito.

Nitinol springs are used in fluid thermal valves, where the material acts as both a temperature sensor and an actuator.

The alloy is used as autofocus actuators in action cameras and optical image stabilizers in mobile phones.

Alloys are used in pneumatic valves for a comfortable seat, which has become the industry standard.

The alloy Chevrolet Corvette contains a Nitinol actuator that replaces the heavier electronic transmission to open and close the hatch to release air in the torso, making it more accessible.

Nitinol powder price

The price of nickel-titanium alloy powder will change randomly with production cost, transportation cost, international situation, exchange rate and supply and demand of nickel-titanium alloy powder market. Tanki New Materials Co.,Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for Nitinol powder, please feel free to send an inquiry to get the latest Nitinol powder price.

Supplier of Nitinol Powder

As a global supplier of Nitinol powders, Tanki New Materials Co.,Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including water-based stearic acid emulsion, water-based calcium stearate, zinc stearate, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.